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• Determining the health of a Cisco switch port?

  - by ewwhite

  I've been chasing a packet-loss and network stability issue for a handful of end-users on an internal network for the past few days... These issues surfaced recently, however, the location was struck by lightning six weeks ago. I was seeing 5-10% packet loss between a stack of four Cisco 2960's and several PC's and phones on the other side of a 77-meter run. The PC's were run inline with the phones over a trunked link. We were seeing dropped calls and interruptions in client-server applications and Microsoft Exchange connectivity. I tried the usual troubleshooting steps remotely, having a local technician do the following during breaks in user and production activity: change cables between the wall jack and device. change patch cables between the patch panel and switch port(s). try different switch ports within the 2960 stack. change end-user devices with known-good equipment (new phones, different PC's). clear switch port interface counters and monitor incrementing errors closely. (Pastebin output of sh int) Pored over the device logs and Observium RRD graphs. No link up/down issues from the switch side. change power strips on the end-user side. test cable runs from the Cisco 2960 using test cable-diagnostics tdr int Gi4/0/9 (clean)* test cable runs with a Tripp-Lite cable tester. (clean) run diagnostics on the switch stack members. (clean) In the end, it took three changes of switch ports to find a stable solution. The only logical conclusion is that a few Cisco 2960 switch ports are bad or flaky... Not dead, but not consistent in behavior either. I'm not used to seeing individual ports die in this manner. What else can I test or check to determine if these devices are bad? Is it common for single ports to have problems, rather than a contiguous bank of ports? BTW - show cable-diagnostics tdr int Gi4/0/14 is very cool... Interface Speed Local pair Pair length Remote pair Pair status --------- ----- ---------- ------------------ ----------- -------------------- Gi4/0/14 1000M Pair A 79 +/- 0 meters Pair B Normal Pair B 75 +/- 0 meters Pair A Normal Pair C 77 +/- 0 meters Pair D Normal Pair D 79 +/- 0 meters Pair C Normal

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• Need to increase nginx throughput to an upstream unix socket -- linux kernel tuning?

  - by Ben Lee

  I am running an nginx server that acts as a proxy to an upstream unix socket, like this: upstream app_server { server unix:/tmp/app.sock fail_timeout=0; } server { listen ###.###.###.###; server_name whatever.server; root /web/root; try_files $uri @app; location @app { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://app_server; } } Some app server processes, in turn, pull requests off /tmp/app.sock as they become available. The particular app server in use here is Unicorn, but I don't think that's relevant to this question. The issue is, it just seems that past a certain amount of load, nginx can't get requests through the socket at a fast enough rate. It doesn't matter how many app server processes I set up, it doesn't even matter what the app is (tried it with a dummy app with just a single endpoint that returned an empty page with status 404). The bottleneck seems to be the socket, not the app. I'm getting a flood of these messages in the nginx error log: connect() to unix:/tmp/app.sock failed (11: Resource temporarily unavailable) while connecting to upstream Many requests result in status code 502, and those that don't take a long time to complete. The nginx write queue stat hovers around 1000. Anyway, I feel like I'm missing something obvious here, because this particular configuration of nginx and app server is pretty common, especially with Unicorn (it's the recommended method in fact). Are there any linux kernel options that needs to be set, or something in nginx? Any ideas about how to increase the throughput to the upstream socket? Something that I'm clearly doing wrong? Additional information on the environment: $ uname -a Linux app1 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux $ ruby -v ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux] $ unicorn -v unicorn v4.3.1 $ nginx -V nginx version: nginx/1.2.1 built by gcc 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) TLS SNI support enabled Current kernel tweaks: net.core.rmem_default = 65536 net.core.wmem_default = 65536 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.tcp_mem = 16777216 16777216 16777216 net.ipv4.tcp_window_scaling = 1 net.ipv4.route.flush = 1 net.ipv4.tcp_no_metrics_save = 1 net.ipv4.tcp_moderate_rcvbuf = 1 net.core.somaxconn = 8192 net.netfilter.nf_conntrack_max = 131072

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• Why do I see a large performance hit with DRBD?

  - by BHS

  I see a much larger performance hit with DRBD than their user manual says I should get. I'm using DRBD 8.3.7 (Fedora 13 RPMs). I've setup a DRBD test and measured throughput of disk and network without DRBD: dd if=/dev/zero of=/data.tmp bs=512M count=1 oflag=direct 536870912 bytes (537 MB) copied, 4.62985 s, 116 MB/s / is a logical volume on the disk I'm testing with, mounted without DRBD iperf: [ 4] 0.0-10.0 sec 1.10 GBytes 941 Mbits/sec According to Throughput overhead expectations, the bottleneck would be whichever is slower, the network or the disk and DRBD should have an overhead of 3%. In my case network and I/O seem to be pretty evenly matched. It sounds like I should be able to get around 100 MB/s. So, with the raw drbd device, I get dd if=/dev/zero of=/dev/drbd2 bs=512M count=1 oflag=direct 536870912 bytes (537 MB) copied, 6.61362 s, 81.2 MB/s which is slower than I would expect. Then, once I format the device with ext4, I get dd if=/dev/zero of=/mnt/data.tmp bs=512M count=1 oflag=direct 536870912 bytes (537 MB) copied, 9.60918 s, 55.9 MB/s This doesn't seem right. There must be some other factor playing into this that I'm not aware of. global_common.conf global { usage-count yes; } common { protocol C; } syncer { al-extents 1801; rate 33M; } data_mirror.res resource data_mirror { device /dev/drbd1; disk /dev/sdb1; meta-disk internal; on cluster1 { address 192.168.33.10:7789; } on cluster2 { address 192.168.33.12:7789; } } For the hardware I have two identical machines: 6 GB RAM Quad core AMD Phenom 3.2Ghz Motherboard SATA controller 7200 RPM 64MB cache 1TB WD drive The network is 1Gb connected via a switch. I know that a direct connection is recommended, but could it make this much of a difference? Edited I just tried monitoring the bandwidth used to try to see what's happening. I used ibmonitor and measured average bandwidth while I ran the dd test 10 times. I got: avg ~450Mbits writing to ext4 avg ~800Mbits writing to raw device It looks like with ext4, drbd is using about half the bandwidth it uses with the raw device so there's a bottleneck that is not the network.

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• OpenBSD pf 'match in all scrub (no-df)' causes HTTPS to be unreachable on mobile network

  - by Frank ter V.

  First of all: excuse me for my poor usage of the English language. For several years I'm experiencing problems with the 'match in all scrub (no-df)' rule in pf. I can't find out what's happening here. I'll try to be clear and simple. The pf.conf has been extremely shortened for this forum posting. Here is my pf.conf: set skip on lo0 match in all scrub (no-df) block all block in quick from urpf-failed pass in on em0 proto tcp from any to 213.125.xxx.xxx port 80 synproxy state pass in on em0 proto tcp from any to 213.125.xxx.xxx port 443 synproxy state pass out on em0 from 213.125.xxx.xxx to any modulate state HTTP and HTTPS are working fine. Until the moment a customer in France (Wanadoo DSL) couldn't view HTTPS pages! I blamed his provider and did no investigation on that problem. But then... I bought an Android Samsung Galaxy SII (Vodafone) to monitor my servers. Hours after I walked out of the telephone store: no HTTPS-connections on my server! I thought my servers were down, drove back to the office very fast. But they were up. I discovered that disabling the rule match in all scrub (no-df) solves the problem. Android phone (Vodafone NL) and Wanadoo DSL FR are now OK on HTTPS. But now I don't have any scrubbing anymore. This is not what I want. Does anyone here understand what is going on? I don't. Enabling scrubbing causes HTTPS webpages not to be loaded on SOME ISP's, but not all. In systat, I strangely DO see a state created and packets received from those ISP's... Still confused. I'm using OpenBSD 5.1/amd64 and OpenBSD 5.0/i386. I have two ISP's at my office (one DSL and one cable). Affects both. This can be reproduced quite easily. I hope someone has experience with this problem. Greetings, Frank

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• How to reference a Domain Controller out of the Local Network?

  - by Adrian

  We have multiple servers scattered over different hosting providers. For learning, experimenting and, ultimately, production purposes, I set one of them as a Domain Controller. That went well, most of our services are now authenticating via AD, which helps us a lot. What I want to do now is to simplify the authentication for the multiple servers, by making each of them look at the Domain Controller. This way, our Devs can log into (Remote Desktop) the multiple servers with the same credentials from AD. I know I have to configure each server to look at the Domain Controller. But when I try to add the Domain Controller to the Computer, it cannot find it, although the Domain Controller address is a valid, reachable internet sub-domain (as in "ad.ourcompany.com"). This is the detailed error message: Note: This information is intended for a network administrator. If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\Windows\debug\dcdiag.txt. The following error occurred when DNS was queried for the service location (SRV) resource record used to locate an Active Directory Domain Controller for domain ad.ourcompany.com: The error was: "DNS name does not exist." (error code 0x0000232B RCODE_NAME_ERROR) The query was for the SRV record for _ldap._tcp.dc._msdcs.ad.ourcompany.com Common causes of this error include the following: - The DNS SRV records required to locate a AD DC for the domain are not registered in DNS. These records are registered with a DNS server automatically when a AD DC is added to a domain. They are updated by the AD DC at set intervals. This computer is configured to use DNS servers with the following IP addresses: 109.188.207.9 109.188.207.10 - One or more of the following zones do not include delegation to its child zone: ad.ourcompany.com ourcompany.com com . (the root zone) For information about correcting this problem, click Help. What am I missing? I'm an experienced Dev, but a newbie Sysdamin experimenting with new stuff. Disclaimer All IP addresses and domains/subdomains were changed to preserve security. If by any chance you still can see private information, please let me know so that I can change it.

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• Linux buffer cache effect on IO writes?

  - by Patrick LeBoutillier

  I'm copying large files (3 x 30G) between 2 filesystems on a Linux server (kernel 2.6.37, 16 cores, 32G RAM) and I'm getting poor performance. I suspect that the usage of the buffer cache is killing the I/O performance. To try and narrow down the problem I used fio directly on the SAS disk to monitor the performance. Here is the output of 2 fio runs (the first with direct=1, the second one direct=0): Config: [test] rw=write blocksize=32k size=20G filename=/dev/sda # direct=1 Run 1: test: (g=0): rw=write, bs=32K-32K/32K-32K, ioengine=sync, iodepth=1 Starting 1 process Jobs: 1 (f=1): [W] [100.0% done] [0K/205M /s] [0/6K iops] [eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=4667 write: io=20,480MB, bw=199MB/s, iops=6,381, runt=102698msec clat (usec): min=104, max=13,388, avg=152.06, stdev=72.43 bw (KB/s) : min=192448, max=213824, per=100.01%, avg=204232.82, stdev=4084.67 cpu : usr=3.37%, sys=16.55%, ctx=655410, majf=0, minf=29 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued r/w: total=0/655360, short=0/0 lat (usec): 250=99.50%, 500=0.45%, 750=0.01%, 1000=0.01% lat (msec): 2=0.01%, 4=0.02%, 10=0.01%, 20=0.01% Run status group 0 (all jobs): WRITE: io=20,480MB, aggrb=199MB/s, minb=204MB/s, maxb=204MB/s, mint=102698msec, maxt=102698msec Disk stats (read/write): sda: ios=0/655238, merge=0/0, ticks=0/79552, in_queue=78640, util=76.55% Run 2: test: (g=0): rw=write, bs=32K-32K/32K-32K, ioengine=sync, iodepth=1 Starting 1 process Jobs: 1 (f=1): [W] [100.0% done] [0K/0K /s] [0/0 iops] [eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=4733 write: io=20,480MB, bw=91,265KB/s, iops=2,852, runt=229786msec clat (usec): min=16, max=127K, avg=349.53, stdev=4694.98 bw (KB/s) : min=56013, max=1390016, per=101.47%, avg=92607.31, stdev=167453.17 cpu : usr=0.41%, sys=6.93%, ctx=21128, majf=0, minf=33 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued r/w: total=0/655360, short=0/0 lat (usec): 20=5.53%, 50=93.89%, 100=0.02%, 250=0.01%, 500=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.12% lat (msec): 100=0.38%, 250=0.04% Run status group 0 (all jobs): WRITE: io=20,480MB, aggrb=91,265KB/s, minb=93,455KB/s, maxb=93,455KB/s, mint=229786msec, maxt=229786msec Disk stats (read/write): sda: ios=8/79811, merge=7/7721388, ticks=9/32418456, in_queue=32471983, util=98.98% I'm not knowledgeable enough with fio to interpret the results, but I don't expect the overall performance using the buffer cache to be 50% less than with O_DIRECT. Can someone help me interpret the fio output? Are there any kernel tunings that could fix/minimize the problem? Thanks a lot,

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• Why is my cron daemon is being killed every few minutes? OpenVZ?

  - by user113215

  As of about a week ago, my cron daemon refuses to stay running. I'm using Debian 6. Running something like pgrep cron shows that the daemon isn't running. I start the service with service cron start or /etc/init.d/cron start and it launches, but it disappears from the running process list after a few minutes (varying anywhere between 1 - 30 minutes before the process is killed again). Using strace -f service cron start, I can see that the process is being killed for some reason: nanosleep({56, 0}, 0x7fffa7184c80) = 0 stat("crontabs", {st_mode=S_IFDIR|S_ISVTX|0730, st_size=4096, ...}) = 0 stat("/etc/crontab", {st_mode=S_IFREG|0644, st_size=1100, ...}) = 0 stat("/etc/cron.d", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 stat("/etc/cron.d/php5", {st_mode=S_IFREG|0644, st_size=475, ...}) = 0 stat("/etc/cron.d/anacron", {st_mode=S_IFREG|0644, st_size=244, ...}) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGCHLD, NULL, {0x4036f0, [CHLD], SA_RESTORER|SA_RESTART, 0x2b0e8465f230}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({60, 0}, <unfinished ...> +++ killed by SIGKILL +++ There's nothing relevant in /var/log/syslog, /var/log/messages, /var/log/auth.log, or /var/log/kern.log to explain why the the process is dying. The system has about 500 MB of free memory, and cat /proc/loadavg returns 0.10 0.21 0.45 so resources shouldn't be the issue. I also tried removing and reinstalling the cron package using apt-get. What else should I check? How do I find out what's killing my crond? Edit: I'm on a virtual machine under OpenVZ (and as such, I have no swap). With cron running, free -m reports: total used free shared buffers cached Mem: 1024 465 558 0 0 0 -/+ buffers/cache: 465 558 Swap: 0 0 0 My OpenVZ User Beancounters via cat /proc/user_beancounters: Version: 2.5 uid resource held maxheld barrier limit failcnt 172087: kmemsize 8275718 25561636 51200000 51200000 0 lockedpages 0 968 2048 2048 0 privvmpages 113442 266465 262200 262200 3740757 shmpages 788 4004 128000 128000 0 dummy 0 0 0 0 0 numproc 39 98 600 600 0 physpages 50521 208434 0 9223372036854775807 0 vmguarpages 0 0 512000 512000 0 oomguarpages 50521 208447 512000 512000 0 numtcpsock 7 323 4096 4096 0 numflock 7 64 2048 2048 0 numpty 1 4 32 32 0 numsiginfo 0 23 1024 1024 0 tcpsndbuf 137984 17878480 20480000 20480000 0 tcprcvbuf 114688 6983504 20480000 20480000 0 othersockbuf 162960 1074440 20480000 20480000 0 dgramrcvbuf 0 24208 10240000 10240000 0 numothersock 101 353 2048 2048 0 dcachesize 459171 747444 10240000 10240000 0 numfile 1010 4221 50000 50000 0 dummy 0 0 0 0 0 dummy 0 0 0 0 0 dummy 0 0 0 0 0 numiptent 39 424 2048 2048 0

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• Windows 8.1 IRQL_NOT_LESS_OR_EQUAL with Asus PCE-n53

  - by JArsenault89

  I saw the following question, and it is the exact same problem on my machine, I have tracked it to the ASUS PCE-n53 wireless card in my desktop. Does anyone know of a workaround? Windows 8.1 RTM installation crashes The adapter worked fine in windows 8... any ideas? EDIT: Crash Dump Analysis * Bugcheck Analysis * * IRQL_NOT_LESS_OR_EQUAL (a) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If a kernel debugger is available get the stack backtrace. Arguments: Arg1: 0000000000000000, memory referenced Arg2: 0000000000000002, IRQL Arg3: 0000000000000001, bitfield : bit 0 : value 0 = read operation, 1 = write operation bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status) Arg4: fffff801ef4f1316, address which referenced memory Debugging Details: WRITE_ADDRESS: 0000000000000000 CURRENT_IRQL: 2 FAULTING_IP: nt!KeReleaseSpinLock+16 fffff801`ef4f1316 f048832100 lock and qword ptr [rcx],0 DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT BUGCHECK_STR: AV PROCESS_NAME: System ANALYSIS_VERSION: 6.3.9600.16384 (debuggers(dbg).130821-1623) amd64fre TRAP_FRAME: ffffd00020d45550 -- (.trap 0xffffd00020d45550) NOTE: The trap frame does not contain all registers. Some register values may be zeroed or incorrect. rax=0000000000000001 rbx=0000000000000000 rcx=0000000000000000 rdx=0000000055920200 rsi=0000000000000000 rdi=0000000000000000 rip=fffff801ef4f1316 rsp=ffffd00020d456e0 rbp=ffffd00020d45768 r8=0000000055920222 r9=0000000035930000 r10=0000000055920222 r11=ffffd00020d456a8 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl zr na po nc nt!KeReleaseSpinLock+0x16: fffff801ef4f1316 f048832100 lock and qword ptr [rcx],0 ds:0000000000000000=???????????????? Resetting default scope LOCK_ADDRESS: fffff801ef6da360 -- (!locks fffff801ef6da360) Resource @ nt!PiEngineLock (0xfffff801ef6da360) Exclusively owned Contention Count = 6 Threads: ffffe000010ff040-01<* 1 total locks, 1 locks currently held PNP_TRIAGE: Lock address : 0xfffff801ef6da360 Thread Count : 1 Thread address: 0xffffe000010ff040 Thread wait : 0x1fbe LAST_CONTROL_TRANSFER: from fffff801ef5647e9 to fffff801ef558ca0 STACK_TEXT: ffffd00020d45408 fffff801ef5647e9 : 000000000000000a 0000000000000000 0000000000000002 0000000000000001 : nt!KeBugCheckEx ffffd00020d45410 fffff801ef56303a : 0000000000000001 0000000000000000 ffff0c83e3e25300 ffffd00020d45550 : nt!KiBugCheckDispatch+0x69 ffffd00020d45550 fffff801ef4f1316 : 00000000000a5890 0000000000000001 0000000000000000 ffffe00004c00000 : nt!KiPageFault+0x23a ffffd00020d456e0 fffff80003b430ad : 00000000000afe80 ffffe00004c00000 00000000000a2f80 0000000035720000 : nt!KeReleaseSpinLock+0x16 ffffd00020d45710 fffff80003ac249f : ffffe00004c00000 00000000000000a8 ffffe00004c85050 0000000000000800 : netr28x+0x840ad ffffd00020d457b0 fffff80000b76475 : ffffd00020d459e8 ffffd00020d459f0 ffffe00004ac2006 ffffe00004ac21a0 : netr28x+0x349f ffffd00020d459a0 fffff80000baa248 : ffffe00004ac2eb8 0000000000000000 ffffe00000000000 ffffe00004ac21a0 : ndis!ndisMInvokeInitialize+0x39 ffffd00020d459e0 fffff80000b74784 : 0000000000000050 ffffe00004907ba0 0000000000000000 01cecbbc328e6cde : ndis!ndisMInitializeAdapter+0x4dc ffffd00020d46050 fffff80000b74d3d : 0000000000000050 ffffe0000443e770 ffffc00000951480 ffffe00004ac21a0 : ndis!ndisInitializeAdapter+0x60 ffffd00020d460a0 fffff80000b74c14 : ffffe00004ac21a0 ffffe00004ac2050 ffffe000047ec2a0 0000000000000000 : ndis!ndisPnPStartDevice+0x89 ffffd00020d460f0 fffff80000b87695 : ffffe00004ac21a0 ffffe00004ac21a0 ffffd00020d461b0 ffffe000047ec2a0 : ndis!ndisStartDeviceSynchronous+0x58 ffffd00020d46140 fffff80000b6a760 : ffffe000047ec2a0 ffffe00004ac21a0 0000000000000000 0000000000000000 : ndis!ndisPnPIrpStartDevice+0x13471 ffffd00020d46170 fffff8000032576c : ffffe00004b11501 ffffe00004b11570 0000000000000001 fffff80000325880 : ndis!ndisPnPDispatch+0x140 ffffd00020d461e0 fffff8000030b40a : ffffe000047ec2a0 0000000000000106 ffffd00020d462f0 ffffe00004b116c0 : Wdf01000!FxPkgFdo::PnpSendStartDeviceDownTheStackOverload+0xe8 ffffd00020d46250 fffff80000305942 : 0000000000000106 ffffd00020d462f0 0000000000000105 ffffd00020d464d0 : Wdf01000!FxPkgPnp::PnpEventInitStarting+0xa ffffd00020d46280 fffff80000305a5a : ffffe00004b116c8 0000000000000002 ffffe00004b11570 ffffe00004b11600 : Wdf01000!FxPkgPnp::PnpEnterNewState+0x102 ffffd00020d46310 fffff80000305bc4 : 0000000000000000 ffffd00020d46400 ffffe00004b116a0 0000000000000000 : Wdf01000!FxPkgPnp::PnpProcessEventInner+0xc2 ffffd00020d46390 fffff8000030c27a : 0000000000000000 ffffe00004b11570 0000000000000000 ffffe00004b11570 : Wdf01000!FxPkgPnp::PnpProcessEvent+0xe4 ffffd00020d46430 fffff80000300936 : ffffe00004b11570 ffffd00020d464c0 0000000000000000 ffffe00004a0e630 : Wdf01000!FxPkgPnp::_PnpStartDevice+0x1e ffffd00020d46460 fffff800002fba18 : ffffe000047ec2a0 ffffe000047ec2a0 0000000000000000 ffffe0000486f020 : Wdf01000!FxPkgPnp::Dispatch+0xd2 ffffd00020d464d0 fffff801ef838796 : 0000000000000000 fffff801ef6aa101 0000000000000000 ffffd000208aa180 : Wdf01000!FxDevice::DispatchWithLock+0x7d8 ffffd00020d465b0 fffff801ef4d5bad : ffffe000011dc3a0 ffffd00020d46659 0000000000000000 fffff801ef7f5ba4 : nt!PnpAsynchronousCall+0x102 ffffd00020d465f0 fffff801ef838e57 : ffffe000011db8d0 ffffe000011db8d0 ffffe00004a8d060 ffffc00002b11200 : nt!PnpStartDevice+0xc5 ffffd00020d466c0 fffff801ef838fe7 : ffffe000011db8d0 ffffe000011db8d0 0000000000000000 ffffe000011db8d0 : nt!PnpStartDeviceNode+0x147 ffffd00020d46790 fffff801ef7fd19e : ffffe000011db8d0 0000000000000001 0000000000000001 ffffe00000000001 : nt!PipProcessStartPhase1+0x53 ffffd00020d467d0 fffff801ef897b17 : ffffe000011db8d0 0000000000000001 0000000000000000 fffff801ef7ef7b2 : nt!PipProcessDevNodeTree+0x3ce ffffd00020d46a50 fffff801ef4f5033 : 0000000100000003 0000000000000000 0000000000000000 0000000000000000 : nt!PiRestartDevice+0xaf ffffd00020d46aa0 fffff801ef44565d : fffff801ef4f4c90 ffffd00020d46bd0 0000000000000000 ffffe00004a10170 : nt!PnpDeviceActionWorker+0x3a3 ffffd00020d46b50 fffff801ef4eec80 : 0000000000000000 ffffe000010ff040 ffffe000010ff040 ffffe0000035c900 : nt!ExpWorkerThread+0x2b5 ffffd00020d46c00 fffff801ef55f2c6 : ffffd00020472180 ffffe000010ff040 ffffe00000608040 ffffc00000002710 : nt!PspSystemThreadStartup+0x58 ffffd00020d46c60 0000000000000000 : ffffd00020d47000 ffffd00020d41000 0000000000000000 0000000000000000 : nt!KiStartSystemThread+0x16 STACK_COMMAND: kb FOLLOWUP_IP: netr28x+840ad fffff800`03b430ad 4533e4 xor r12d,r12d SYMBOL_STACK_INDEX: 4 SYMBOL_NAME: netr28x+840ad FOLLOWUP_NAME: MachineOwner MODULE_NAME: netr28x IMAGE_NAME: netr28x.sys DEBUG_FLR_IMAGE_TIMESTAMP: 51de7a8d FAILURE_BUCKET_ID: AV_netr28x+840ad BUCKET_ID: AV_netr28x+840ad ANALYSIS_SOURCE: KM FAILURE_ID_HASH_STRING: km:av_netr28x+840ad FAILURE_ID_HASH: {a1f86ced-f566-ac23-afeb-1aa88ea5ab8f} Followup: MachineOwner

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• Setting up a very mixed Active Directory network to work with PowerShell Remote Administration

  - by erictheavg

  Summary: I want to be able to monitor the computers on my network, but don't need it to be automated. We're too small to purchase anything like MOM, but too big to do anything manually (~100 machines in two locations). I just keep running into issues, and was wondering if there's a master list of Group Policy settings I can distribute to my environment to get Remote Powershell working. Environment: Our AD network is pretty mixed. The end users have XP SP3, Win 7, and Win 7 x64. The servers include Win2k3 SP2, Win2k8, Win2k8 x64, Win2k8 R2, and Win2k8 R2 x64. Details: I'm trying to get it to work with Remote Powershell, but I run into errors like the following: Connecting to remote server failed with the following error message : The WinRM client cannot process the request. Default authentication may be used with an IP address under the following conditions: the transport is HTTPS or the destination is in the TrustedHosts list, and explicit credentials are provided. Use winrm.cmd to configure TrustedHosts. Note that computers in the TrustedHosts list might not be authenticated. For more information on how to set TrustedHosts run the following command: winrm help config. For more information, see the about_Remote_Troubleshooting Help topic. + CategoryInfo : OpenError: (:) [], PSRemotingTransportException + FullyQualifiedErrorId : PSSessionStateBroken Then I go to the computer (Win2k3 SP2 server) and run winrm quickconfig per the recommendations via google, and it says: Make these changes [y/n]? y WinRM has been updated to receive requests. WinRM service started. WSManFault Message = The client cannot connect to the destination specified in the request. Verify that the service on the destination is running and is accepting requests. Consult the logs and documentation for the WS-Management service running on the destination, most commonly IIS or WinRM. If the destination is the WinRM service, run the following command on the destination to analyze and configure the WinRM service: "winrm quickconfig". Error number: -2144108526 0x80338012 The client cannot connect to the destination specified in the request. Verify that the service on the destination is running and is accepting requests. Consult the logs and documentation for the WS-Management service running on the destination, most commonly IIS or WinRM. If the destination is the WinRM service, run the following command on the destination to analyze and configure the WinRM service: "winrm quickconfig". That's right. It tells me to remedy my winrm quickconfig failure by running winrm quickconfig. I don't want to band-aid this project one google search at a time. I'm sure there is a step-by-step tutorial out there on how to set up a network for powershell remote administration. Does anyone know of one? Books are acceptable. Thanks in advance! I didn't think my question would get this long.

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• Benchmark MySQL Cluster using flexAsynch: No free node id found for mysqld(API)?

  - by quanta

  I am going to benchmark MySQL Cluster using flexAsynch follow this guide, details as below: mkdir /usr/local/mysqlc732/ cd /usr/local/src/mysql-cluster-gpl-7.3.2 cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysqlc732/ -DWITH_NDB_TEST=ON make make install Everything works fine until this step: # /usr/local/mysqlc732/bin/flexAsynch -t 1 -p 80 -l 2 -o 100 -c 100 -n FLEXASYNCH - Starting normal mode Perform benchmark of insert, update and delete transactions 1 number of concurrent threads 80 number of parallel operation per thread 100 transaction(s) per round 2 iterations Load Factor is 80% 25 attributes per table 1 is the number of 32 bit words per attribute Tables are with logging Transactions are executed with hint provided No force send is used, adaptive algorithm used Key Errors are disallowed Temporary Resource Errors are allowed Insufficient Space Errors are disallowed Node Recovery Errors are allowed Overload Errors are allowed Timeout Errors are allowed Internal NDB Errors are allowed User logic reported Errors are allowed Application Errors are disallowed Using table name TAB0 NDBT_ProgramExit: 1 - Failed ndb_cluster.log: WARNING -- Failed to allocate nodeid for API at 127.0.0.1. Returned eror: 'No free node id found for mysqld(API).' I also have recompiled with -DWITH_DEBUG=1 -DWITH_NDB_DEBUG=1. How can I run flexAsynch in the debug mode? # /usr/local/mysqlc732/bin/flexAsynch -h FLEXASYNCH Perform benchmark of insert, update and delete transactions Arguments: -t Number of threads to start, default 1 -p Number of parallel transactions per thread, default 32 -o Number of transactions per loop, default 500 -l Number of loops to run, default 1, 0=infinite -load_factor Number Load factor in index in percent (40 -> 99) -a Number of attributes, default 25 -c Number of operations per transaction -s Size of each attribute, default 1 (PK is always of size 1, independent of this value) -simple Use simple read to read from database -dirty Use dirty read to read from database -write Use writeTuple in insert and update -n Use standard table names -no_table_create Don't create tables in db -temp Create table(s) without logging -no_hint Don't give hint on where to execute transaction coordinator -adaptive Use adaptive send algorithm (default) -force Force send when communicating -non_adaptive Send at a 10 millisecond interval -local 1 = each thread its own node, 2 = round robin on node per parallel trans 3 = random node per parallel trans -ndbrecord Use NDB Record -r Number of extra loops -insert Only run inserts on standard table -read Only run reads on standard table -update Only run updates on standard table -delete Only run deletes on standard table -create_table Only run Create Table of standard table -drop_table Only run Drop Table on standard table -warmup_time Warmup Time before measurement starts -execution_time Execution Time where measurement is done -cooldown_time Cooldown time after measurement completed -table Number of standard table, default 0

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• Nagios3: Conditional operators for service checks?

  - by Dave

  I'm trying to setup Nagios to monitor my various using hostgroups to define 'machine roles', against which I run services to check the machines by role. However, I'd like to use conditional operators that would enable me to run the service check against an intersection of two host groups, rather than their unions... i.e. using &&, ||, or () operators. For example, imagine I have the following servers: www-eu: Linux WWW (Apache) server, in the EU www-us: Windows WWW (IIS) server, in the US (West coast) ftp-eu: Linux FTP server, in the EU ftp-us: Windows FTP server, in the US I would want to create the following host groups: US-Servers: www-us, ftp-us EU-Servers: www-eu, ftp-eu WWW-Servers: www-us, www-eu FTP-Servers: ftp-us, ftp-eu Now say I'm interested in checking the HTTP response time for my web servers. Then let's say this particular Nagios service is running from the US (West Coast), and that I have a command called *check_http_response_time*. This command will check the responsiveness of the HTTP server, which I can provide an argument which defines the max response time before raising critical. My command might look like: check_http_response_time $HOSTNAME$ 50 Now traditionally, I can run my checks by specifying a list of host or hostgroups. define service{ use local-service hostgroup_name WWW-Servers # Servers = www-us, www-eu servicegroups WWW Checks service_description Check HTTP Response Time check_command check_http_response_time!50 } However, with the above service definition, given my Nagios service is in US West, I could reasonably expect that my EU server will return critical. Really, I want different thresholds for each region (50 for US West, 200 for EU.) I would have to permutate my service for each host and set their custom threshold, or alternatively permutate out my service groups by role & region (i.e. WWW-Servers-EU), and run my specific thresholds against those. Though the latter is better, both are much messier than I'd like... What I would love, and what this post is asking for, is a way to use hostgroups to perform an intersection using conditional logic, rather than a simple union. It might look like: define service{ use local-service hostgroup_name WWW-Servers && US-Servers servicegroups WWW Checks service_description Check HTTP Response Time check_command check_http_response_time!50 } It then would run the check only against servers that are in both WWW-Servers and US-Servers, in my example, just www-us. The benefits of such a feature would be significant for Nagios services configured for large-scale. Is this feature available? If it isn't, will it be available in the future? Is there an alternative way to accomplish this given the most recent Nagios version? Any tips/suggestions are most appreciated! Dave

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• MySQL Execution Time Spikes

  - by Brett

  I am having issues with MySQL all of the sudden today. Details: OS: CentOS release 5.7 Server type: Parallels virtuozzo container running on mediatemple DV 4.0 package Average total memory usage: <500mb Total memory usage allowed: 1gb (part of shared pool for emergency only, users are only guaranteed 500mb) Processor: 1ghz Main database sizes with most usage: 275mb & 107mb server stack: nginx 1.0.10, mysql 5.1.54, php 5.3.8 with php-fpm innodb_buffer_pool_size=100M php-fpm max children: 5 Webapps: custom php-based sites, magento & drupal slow query timeout is set to 1 second Steps I completed towards diagnosis: Cannot restart container yet - I will try later tonight when our domestic traffic has dropped Enabled mysql and php-fpm slowlog. Found functions that did DB queries in php-fpm slowlog were taking over 1s to complete at times Found some simple queries in mysql slowlog taking well over 1s to complete that should take less than 1s. Most interesting - execution time seems to spike at times. A query will take .2s a couple times, then one time it will take 8s to run the same query. These results were verified by running raw SQL queries through mysql command line. Top does not reveal anything too interesting Only resource related thing i can see is load averages much higher than normal Up until today, mysql has been fine, there have been no major changes to the db since yesterday. Sometimes things are so bad, I am seeing bad gateway errors after 60s of execution time. Innodb is doing on average 300-1400 reads/sec. Mysql is doing 3-10 queries/sec slow query count in 2 hours uptime is 171 (with slow timeout at 1 second) Tried restarting mysql, nginx, php-fpm multiple times For example: UPDATE `catalogsearch_query` SET `query_text` = 'EW 90', `num_results` = '7532', `popularity` = '99180', `redirect` = NULL, `synonym_for` = NULL, `store_id` = '1', `display_in_terms` = '1', `is_active` = '1', `is_processed` = '1', `updated_at` = '2012-05-08 21:38:31' WHERE (query_id='31'); This query took 17sec to complete one time, rest of the time around .079 sec. But varies, sometimes 1sec, sometimes .004 sec. This is running the same query, over and over with a couple seconds time in between each. Most tables are innodb, and sometimes I noticed the lock time taking 90% of the query execution time, but most of the time lock time is insignificant. Any idea what's going on here?

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• Varnish + Plesk : vhost broken

  - by Raphaël

  I have an e-commerce site with 300,000 products and 20,000 categories. It is slow and currently in production. I decided to install Varnish to speed up. The trouble is that during installation, I got a Guru Meditation. Since the site is in production, I am not allowed to leave this error more than a second, thinking to have made an enormous stupidity. I followed the following tutorial: http://www.euperia.com/linux/setting-up-varnish-with-apache-tutorial I'm sure I followed all without error. I say that there may be a specific configuration with plesk. Has anyone already installed Varnish on a ubuntu 11.04 server with plesk 10? Does anyone have a better resource? I know it is "very vague" as an error, but maybe some of you have had this problem. edit 24/11/2011 I continued to work on Varnish + Plesk ... but it still does not work. 1) I changed the port for apache in plesk General # mysql -uadmin -p`cat /etc/psa/.psa.shadow` -D psa -e'replace into misc (param, val) values ("http_port", 8008)' 1.1) I rebuild the server conf # /usr/local/psa/admin/bin/httpdmng --reconfigure-all 2) I changed the apache conf files (if those were not taking full plesk top) vim /etc/apache2/ports.conf NameVirtualHost *:8008 Listen 8008 2.1) I do the same with /etc/apache2/sites-enables/000-default 3) I changed the port of my vhost (a single server) vim /var/www/vhosts/MYDOMAIN.COM/conf/XXXXXXXXX.http.include Replace the port 80 by this I want. Rebuild the vhost conf /usr/local/psa/admin/sbin/websrvmng --reconfigure-vhost --vhost-name=<domain_name> with without www (See my issue in serverfault: Edit vhost port in plesk 10.3 ) 4) I installed varnish by following this tutorial : http://www.euperia.com/linux/setting-up-varnish-with-apache-tutorial 5) I restart apache 2 + varnish service apache2 restart service varnish restart When I go to my site, I come across a page of apache It works! This is the default web page for this server. The web server software is running but no content has been added, yet. Can somebody help me ? This means that my vhost does not point to the right place. Why? What to do? How?

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• Linux buffer cache effect on IO writes?

  - by Patrick LeBoutillier

  Hi, I'm copying large files (3 x 30G) between 2 filesystems on a Linux server (kernel 2.6.37, 16 cores, 32G RAM) and I'm getting poor performance. I suspect that the usage of the buffer cache is killing the I/O performance. To try and narrow down the problem I used fio directly on the SAS disk to monitor the performance. Here is the output of 2 fio runs (the first with direct=1, the second one direct=0): Config: [test] rw=write blocksize=32k size=20G filename=/dev/sda # direct=1 Run 1: test: (g=0): rw=write, bs=32K-32K/32K-32K, ioengine=sync, iodepth=1 Starting 1 process Jobs: 1 (f=1): [W] [100.0% done] [0K/205M /s] [0/6K iops] [eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=4667 write: io=20,480MB, bw=199MB/s, iops=6,381, runt=102698msec clat (usec): min=104, max=13,388, avg=152.06, stdev=72.43 bw (KB/s) : min=192448, max=213824, per=100.01%, avg=204232.82, stdev=4084.67 cpu : usr=3.37%, sys=16.55%, ctx=655410, majf=0, minf=29 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued r/w: total=0/655360, short=0/0 lat (usec): 250=99.50%, 500=0.45%, 750=0.01%, 1000=0.01% lat (msec): 2=0.01%, 4=0.02%, 10=0.01%, 20=0.01% Run status group 0 (all jobs): WRITE: io=20,480MB, aggrb=199MB/s, minb=204MB/s, maxb=204MB/s, mint=102698msec, maxt=102698msec Disk stats (read/write): sda: ios=0/655238, merge=0/0, ticks=0/79552, in_queue=78640, util=76.55% Run 2: test: (g=0): rw=write, bs=32K-32K/32K-32K, ioengine=sync, iodepth=1 Starting 1 process Jobs: 1 (f=1): [W] [100.0% done] [0K/0K /s] [0/0 iops] [eta 00m:00s] test: (groupid=0, jobs=1): err= 0: pid=4733 write: io=20,480MB, bw=91,265KB/s, iops=2,852, runt=229786msec clat (usec): min=16, max=127K, avg=349.53, stdev=4694.98 bw (KB/s) : min=56013, max=1390016, per=101.47%, avg=92607.31, stdev=167453.17 cpu : usr=0.41%, sys=6.93%, ctx=21128, majf=0, minf=33 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued r/w: total=0/655360, short=0/0 lat (usec): 20=5.53%, 50=93.89%, 100=0.02%, 250=0.01%, 500=0.01% lat (msec): 2=0.01%, 4=0.01%, 10=0.01%, 20=0.01%, 50=0.12% lat (msec): 100=0.38%, 250=0.04% Run status group 0 (all jobs): WRITE: io=20,480MB, aggrb=91,265KB/s, minb=93,455KB/s, maxb=93,455KB/s, mint=229786msec, maxt=229786msec Disk stats (read/write): sda: ios=8/79811, merge=7/7721388, ticks=9/32418456, in_queue=32471983, util=98.98% I'm not knowledgeable enough with fio to interpret the results, but I don't expect the overall performance using the buffer cache to be 50% less than with O_DIRECT. Can someone help me interpret the fio output? Are there any kernel tunings that could fix/minimize the problem? Thanks a lot,

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• Cannot browse network shares in Windows Explorer, but paths are still accessible

  - by Jeff Lockhart

  Windows Explorer has somehow corrupted itself and I'm not sure how to fix this problem. My Windows installation has been in use for a few years with network shares setup and working. Recently, I noticed that a program that I use to save network share paths to a database was no longer opening the explorer window to browse the path. It usually opens to the last path saved, but now it was just not opening at all. When I go to Windows Explorer to browse the network share directly, I get the error \\SERVER is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. The specified network provider name is invalid. The network shares are just shares on the server itself (once saved to the database, they're used on the server as well as clients to reach files). The strange thing is, the files are still accessible from the program that uses them if I type the network share path in manually. So it is only a problem with Windows Explorer browsing the path. The reason I think there is some sort of configuration or setting, possibly in the registry, corrupted is that when the problem first manifest itself, I was somehow able to open an explorer window to a network share path, but the breadcrumb in the address bar did not function properly. It duplicated the share name folder at the top of the breadcrumb stack and when I clicked the second of the duplicated share folder, it crashed explorer.exe. I haven't been able to browse any network share path since this happened. I have tried using the IP address directly \\192.168.1.# as well as \\localhost and neither of those work either. I have tried running sfc /scannow and it did not find any errors. I tried ipconfig /flushdns and this made no difference. Attempting to map the network share to a drive fails using either the explorer GUI or net use command. Is there some way to reset Windows Explorer somehow to resolve this? I'd really like to avoid reinstalling Windows entirely if I can.

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• Starting/Stopping Custom PHP Chat Server Linux Service (CentOS)

  - by chad

  I have been trying all night to get this service working properly. I created this script from a template and am very new to bash coding. I wrote a fully functioning chat server in php which runs endlessly, but now want to make it a dedicated service. I want to do this so that it starts on server boot and boots back up if possible when there are any down-times with the server. The issue is that I need this thing to run in a detached screen so that I can monitor packet data or send server commands via SSH when need-be. The main problem that i'm having is that it needs to have its own PID when it starts so that I can stop/restart it when needed. I am the type who grinds on coding until I figure it out, but this is so new to me that it seems the learning curve here is very steep and frustrating. Below is my code if anybody can please help me with this one, i've gotten so tired I can't even concentrate any more :( #!/bin/sh # # chatserver # # chkconfig: 345 20 90 # description: chatServer Linux Service Daemon \ # for general server handling ### BEGIN INIT INFO # Provides: chatserver # Required-Start: $local_fs $network $named $syslog # Required-Stop: $local_fs $syslog # Default-Start: 3 4 5 # Default-Stop: 0 1 2 6 # Short-Description: This service maintains the chatServer # Description: chatServer Linux Service Daemon # for general server handling ### END INIT INFO # Source function library. . /etc/rc.d/init.d/functions exec="screen php -q /var/www/html/chatServer.php" prog="chatserver" config="/etc/sysconfig/$prog" pidfile="/var/run/chatserver.pid" [ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog lockfile=/var/lock/subsys/$prog start() { #$exec || exit 5 echo -n $"Starting $prog: " daemon $exec --name=$exec --pidfile=$pidfile retval=$? echo [ $retval -eq 0 ] && touch $lockfile return $retval } stop() { echo -n $"Stopping $prog: " killproc -p $pidfile rm -f $pidfile retval=$? echo [ $retval -eq 0 ] && rm -f $lockfile return $retval } restart() { stop start } reload() { restart } force_reload() { restart } rh_status() { # run checks to determine if the service is running or use generic status status $prog } rh_status_q() { rh_status >/dev/null 2>&1 } case "$1" in start) rh_status_q && exit 0 $1 ;; stop) rh_status_q || exit 0 $1 ;; restart) $1 ;; reload) rh_status_q || exit 7 $1 ;; force-reload) force_reload ;; status) rh_status ;; condrestart|try-restart) rh_status_q || exit 0 restart ;; *) echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}" exit 2 esac exit $?

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• a hidden program (virus) send hundred e-mail - Can you have any experience on something similar ?

  - by Aristos

  In one tablet computer yesterday I make the usually automatic updates from ms. This tablet have comodo firewall, and and old nod32. After that I notice very soon, that something start sending hundred smtp e-mail the moment the tablet computer is connected to the internet. Also the previous t time I have make updates, some 'virus' gets on the computer but I find very easy and stop it from run. I find using the autostart from sysinternals, and the process explorer. This virus has also break the automatic update from ms, and lost a lot of time to fix it. This is my usually practice when some call me to delete a virus from xp, I use the process explorer and autostart to locate the program, and delete it from everywhere. How ever the last one is so hard to locate. 0.I delete everything from temp directorys and search for suspicious files everywhere, run the nod32, 1.I use the TCPView to see witch program sending the smpt (I see hundred open smpt connections sending emails) but the SMTP was opened by the main service program. 2. I use the process monitor to locate whats happens but find again the main service that do the job. 3.I start delete many thinks on process explorer, but did not found the one that send the emails 4.I open many times the autorun but did not find there also something suspicion, I stop some thinks, but nothing happends. 5.From the last time that I suspect that this virus come to my computer and I partial remove it, he has broke my windows update, to fix it I lost a lot of time, searching on Internet for the error - it was just a register to a dll. 6.From what I suspect something is trigger after the ms update. 7.For the moment I block the email ports, and try to find a way to locate it. I like to notice here that everything is genius - and I mean everything. I believe that this virus pass from a page, or from an e-mail that this computer receive it in the past. Any help or information are appreciate. If you know anything similar, if you know how this virus send emails and how can I locate it, if you know any anti-virus anti-spyware program that maybe can find it. If you know how a virus gets after the ms updates. Million thanks.

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• Need Windows XP VGA driver for i3 Haswell

  - by AFH

  Background: I have recently upgraded my hardware because the previous Pentium system started failing to the point that it would not run long enough to boot. It was obviously a hardware fault, but I had no way of knowing whether it was in the motherboard, CPU or memory. Not all the components were now available, so I decided to replace all three. In order to get some benefit from the expenditure, I though I would put in faster components, and for future-proofing went for recently released ones: MSI Z87-G41-PCMate and Intel i3-4130 with 4400 HD graphics. The system performs excellently with Ubuntu 13.10, so I know there are no hardware problems, but I need to continue running XP because it runs several thousand pounds (UK) worth of software, which meets my needs more than adequately: in some cases there is no longer support for later Windows releases, and in most others an expensive and to me unnecessary upgrade is required. Problem: The motherboard specifications claim Windows XP support for the live driver update utility, which misled me into believing that XP drivers were available. Not true: Intel have apparently refused to provide XP drivers for Haswell chips. The update program runs on XP, but finds no suitable Intel drivers. The system is more or less running on the default fail-safe VGA driver, but DirectX will not load, which stops a number of my applications from running. I have been trawling the internet for a month now, but I have not found a graphics driver which will load successfully: all show "This device cannot start. (code 10)". I don't need HDMI support: my monitor is 1280x1024 and connected through the VGA port, so all I need is a driver which will handle this resolution well enough to support DirectX. Has anyone found a driver which will do this? Please don't reply with information found from internet searches, unless you have actually solved this problem: be assured that I have been all round the houses looking at solutions which others have reported as working, but none of them does for me. Incidentally, I did find an Intel HD sound driver which XP accepts (winxp_145111.exe from Intel), though without connecting to an HDMI port on a TV or sound system I have no idea if it works in practice. However, the graphics section of the same driver fails, like all the others I've tried.

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• Some apps very slow to load on Windows 7, copy & paste very slow.

  - by Mike

  Hello, I searched here and couldn't find a similar issue to mine but apologies if I missed it. I've searched the web and no one else seems to be having the same issue either. I'm running Windows 7 Ultimate 64bit on a pretty high spec. machine (well, apart from the graphics): Asus M4A79T Deluxe AMD Phenom II 965 black edition (quad core, 3.4GHz) 8GB Crucial Ballistix DDR 1333MHz RAM 80GB Intex X25 SSD for OS 500GB mechanical drive for data. ATi Radeon HD 4600 series PCI-e Be Quiet! 850W PSU I think those are all the relevant stats, if you need anything else let me know. I've updated chipset, graphics and various other drivers all to no avail, the problem remains. I have also unplugged and replugged every connection internally and cleaned the RAM edge connectors. The problems: Video LAN (VLC) and CDBurnerXP both take ages to load, I'm talking 30 seconds and 1 minute respectively which is really not right. Copy and paste from Open Office spread sheet into Fire Fox, for example, is really, really slow, I'll have pressed control V 5 or 6 times before it actually happens, if I copy and then wait 5 to 10 seconds or so it'll paste first time so it's definitely some sort of time lag. Command and Conquer - Generals: Zero Hour. When playing it'll run perfectly for about 10 or 20 seconds then it'll just pause for 3 or 4 then run for another 10 or 20 seconds and pause again and so on. I had the Task Manager open on my 2nd monitor whilst playing once and I noticed it was using about 25% of the CPU, pretty stable but when the pause came another task didn't shoot up to 100% like others on the web have been reporting (similar but not the same as my issue, often svchost.exe for them) but dropped to 2 or 3% usage then back up to 25% when it started playing properly again. Very odd! But it gets even odder... I had a BSOD and reboot last week, when it rebooted the problem had completely gone, I could play C&C to my heart's content and both the other apps loaded instantly, copy and paste worked instantly too. I did an AVG update earlier this week which required a reboot, rebooted and the problem's back. I don't think it's AVG related though, I think it was just coincidence that's the app that required a reboot. I think any reboot would have brought the issue back. A number of reboots later and it hasn't gone away again. If any one could make any suggestions as to the likely cause and solution to these issues I'd be most grateful, it's driving me nuts! Thanks, Mike....

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• SSD Fresh Does Not Start

  - by Jim Fell

  I recently installed a new 60GB SSD as my primary hard drive and re-installed Windows 7 Professional 64-bit. I then installed SSD Fress from Abelssoft to optimize Windows to run on the SSD. It seemed to install okay, but when I try to run the utility, its splash screen appears briefly before it quietly closes. No errors are displayed; the utility just fails to launch. I have run SSD Fresh on another SSD-equipped Windows 7 Pro x64 computer in the past without any problems. Does anyone know what might be preventing the program from running? I tried shutting down the Spybot Resident and disabling the firewall and virus scanner with no luck. I also tried running the tool as administrator; I even tried reinstalling it, running the installer as administrator. No luck. Every time I try to launch the program the Event Viewer logs this same set of errors: Error 4/2/2012 11:35:44 PM Application Error 1000 (100) Error 4/2/2012 11:35:43 PM .NET Runtime 1026 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None Error 4/2/2012 11:35:39 PM SideBySide 59 None For those who are interested, here is my system configuration: ASRock M3A770DE AM3 AMD 770 ATX AMD Motherboard AMD Athlon II X3 455 Rana 3.3GHz Socket AM3 95W Triple-Core Desktop Processor ADX455WFGMBOX G.SKILL Value Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model F3-10600CL9D-8GBNT Mushkin Enhanced Chronos Deluxe MKNSSDCR60GB-DX 2.5" 60GB SATA III Synchronous MLC Internal Solid State Drive (SSD) (Primary/Boot HD) Western Digital Caviar Blue RFHWD1600AAJS 160GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive (Secondary HD) Sony Optiarc CD/DVD Burner Black SATA Model AD-7261S-0B LightScribe Support RAIDMAX RX-850AE 850W ATX12V v2.3 / EPS12V SLI Certified CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply ASUS HD7850-DC2-2GD5 Radeon HD 7850 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card Asus ML228H 21.5" Full HD LED BackLight LED Monitor Slim Design (x3)

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• How can I play my MP3 files through my stereo system?

  - by Joel Coehoorn

  Here's the situation. Like many others I have my entire CD collection ripped to my PC, along side other music I've acquired through iTunes or Amazon MP3. Also like many others the speakers at my PC are underpowered, and likely included in my monitor as an afterthought. This is fine for most use: system sounds, YouTube, etc. Even games sounds and music. But I'd like something a little better for when I really want to listen to music. And I have it; in the next room — barely 25 feet away as the crow flies — sits a nice 400 watts stereo system. The stereo supports MP3 CDs, so up to this point I've just kept a few CD-RW disks around to keep most of my collection available. But it's time to move on to something a little more sophisticated. What are my options for using the MP3 files available on my computer as an input for this stereo? Some notes: I want to be able to control what song the stereo is playing without having to go to the PC, including setting up and retrieving playlists. Ideally this should even be able to wake the PC from sleep mode to start playing. I primarily use Windows Media Player on the PC (which runs Windows Vista). However, the files themselves live on a server running Windows Server 2008, and so I could also install something on the server and run everything from there. The axillary input on the stereo is unfortunately limited to a 1/8 inch stereo mini-plug. I'm loath to run wires across two rooms, and I'm considering moving the stereo to the garage at some point. Therefore a wireless solution that can easily cover about 100 ft or so is preferred. I already have a Wi-Fi network ready, but it's secured so anything using Wi-Fi should make it easy to set up security. Bonus points for doing it in under $85 shipped at Amazon (I'm hoping to pay for this via $85 worth of Amazon gift cards). I know this a pretty tight budget, so just getting close is okay. Bonus points for something that remembers multiple profiles (keep my favorite songs separate from the wife's). Bonus points for a remote that can also replace my stereo remote, so I only need one device to control everything. I'm not holding my breath on this one given my price range, though. Bonus points if I can also use for Internet radio. Doing some research on my own as well. This looks like it'll do exactly what I want, but it lists at an outrageous $299: http://www.linksysbycisco.com/US/en/products/DMP100

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• Remote installing an msi on citrix servers using WMI

  - by capn

  OK, I'm a C# programmer that is trying to streamline the deployment of a custom windows form app I inherited and built an installer for with WiX (this app will need to be reinstalled regularly as I'm making changes to it). I'm not really used to admin type things (or vbs, or WMI, or terminal servers, or Citrix, and even WiX and MSI are not things I usually deal with) but so far I put together some vbs and have an end goal in mind. The msi does work, and I've installed it from the mapped O: drive on my dev machine and while RDP'd to a citrix machine. End Goal: Deploy code written on my dev machine and compiled into an MSI (that I can improve upon within the confines of WiX and whatever the Windows Installer Engine allows) to the cluster of Citrix machines my users have access to. What am I missing in my script to get the MSI to execute on the remote machines? Layout: Machine A is my dev machine, and has the vbs script and the msi file (XP SP3) Machines C1 - C6 are the Citrix Servers that need the application installed them via the msi (Server 2003 R2 SP2) There is also optionally a shared network resource that all the machines can access. Script: 'Set WMI Constants Const wbemImpersonationLevelImpersonate = 3 Const wbemAuthenticationLevelPktPrivacy = 6 'Set whether this is installing to the debug Citrix Servers Const isDebug = true 'Set MSI location 'Network location yields error 1619 (This installation package could not be opened.) msiLocation = "\\255.255.255.255\odrive\Citrix Deployment\Setup.msi" 'Directory on machine A yields error 3 (file not found) 'msiLocation = "C:\Temp\Deploy\Setup.msi" 'Mapped network drive (on both machines) yield error 3 (file not found) 'msiLocation = "O:\Citrix Deployment\Setup.msi" 'Set login information strDomain = "MyDomain" Wscript.StdOut.Write "user name:" strUser = Wscript.StdIn.ReadLine Set objPassword = CreateObject("ScriptPW.Password") Wscript.StdOut.Write "password:" strPassword = objPassword.GetPassword() 'Names of Citrix Servers Dim citrixServerArray If isDebug Then citrixServerArray = array("C4") Else 'citrixServerArray = array("C1","C2","C3","C5","C6") End If 'Loop through each Citrix Server For Each citrixServer in citrixServerArray 'Login to remote computer Set objLocator = CreateObject("WbemScripting.SWbemLocator") Set objWMIService = objLocator.ConnectServer(citrixServer, _ "root\cimv2", _ strUser, _ strPassword, _ "MS_409", _ "ntlmdomain:" + strDomain) 'Set Remote Impersonation level objWMIService.Security_.ImpersonationLevel = wbemImpersonationLevelImpersonate objWMIService.Security_.AuthenticationLevel = wbemAuthenticationLevelPktPrivacy 'Reference to a process on the machine Dim objProcess : Set objProcess = objWMIService.Get("Win32_Process") 'Change user to install for terminal services errReturn = objProcess.Create _ ("cmd.exe /c change user /install", Null, Null, intProcessID) WScript.Echo errReturn 'Install MSI here 'Reference to a product on the machine Set objSoftware = objWMIService.Get("Win32_Product") 'All users set in option parameter, I'm led to believe that the third parameter is actually ignored 'http://www.webmasterkb.com/Uwe/Forum.aspx/vbscript/2433/Installing-programs-with-VbScript errReturn = objSoftware.Install(msiLocation,"ALLUSERS=2 REBOOT=ReallySuppress",True) Wscript.Echo errReturn 'Change user back to execute errReturn = objProcess.Create _ ("cmd.exe /c change user /execute", Null, Null, intProcessID) WScript.Echo errReturn Next I also tried using this to install, it doesn't return an error code, but doesn't install the msi either, and it makes me wonder if the change user /install command is even really working. errReturn = objProcess.Create _ ("cmd.exe /c msiexec /i ""O:\Citrix Deployment\Setup.msi"" /quiet") Wscript.Echo errReturn

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• How do I troubleshoot root cause of a hung windows (2003) server?

  - by GregW

  I have a pair of Windows (2003 Server) servers both running MS SQL Server (2008 EE) that each hang every few months. This has been occurring intermittently :( for the past 15 months pretty much since we started using the servers. The symptoms are as-follows: I cannot remote desktop in to troubleshoot; when I attempt to, I get stuck on a blank black screen and am never offered a login prompt I can still ping the servers I can still open a SQL connection to the server, and, CURIOUSLY/BIZARRELY, when I do a "select getdate()", the time it returns appears to be stuck on the exact fraction of a second when (I presume) the server hung. Repeated attempts to do "select getdate()" keep getting that same date, suggesting that the clock is frozen. Filesharing attempts to connect to the hung server fail with the error message: "\ServerName is not accessible. You might not have permissions to use this network resource. Contact the administrator of this server to find out if you have access permissions. The server's clock is not synchronized with the primary domain controller's clock." This is consistent with a frozen clock. Post-reboot, if I investigate the Windows Event Viewer logs, I can see many security accesses (coming from me and others) that I recognize were login attempts during the "down" period, but all of them in the security log are associated with that same timestamp of when the server hung. This also suggests the clock is frozen. There is not a clear cause in the Application or System event logs. I have a local Admin account on the server and am in the process of getting a domain-credentialed Admin account for better remote admin access. HP is supposed to be supporting these machines and has some low-level ILO2 access but they seem incapable of finding the root cause. A reboot will "fix" the problem but I would like to get to the root cause and solve the issue. Has anyone ever seen something like this odd clock behavior?! (If it were just one server I'd perhaps say a bad hardware clock, but two?) Can anyone advise me on what I should try to troubleshoot this sort of situation to find the root cause (or what I should tell HP to try?)

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• Tomcat with virtual hosts - 404

  - by Thardas

  I have a CentOS 5.2 server set up with Apache 2.2.3 and Tomcat 5.5.27. The server hosts multiple virtual hosts connected to multiple Tomcats. For instance we have one tomcat for development and testing and one tomcat for production. project.demo.us.com points to dev tomcat and project.us.com points to production tomcat. Here's the virtual host's configuration: <VirtualHost *:80> ServerName project.demo.us.com CustomLog logs/project.demo.us.com/access_log combined env=!VLOG ErrorLog logs/project.demo.us.com/error_log DocumentRoot /var/www/vhosts/project.demo.us.com <Directory /var/www/vhosts/project.demo.us.com> Allow from all AllowOverride All Options -Indexes FollowSymLinks </Directory> ########## ########## ########## JkMount /project/* online </VirtualHost> JkMount line defines that we use online worker and our workers.properties contains this: worker.list=..., online, ... worker.online.port=7703 worker.online.host=localhost worker.online.type=ajp13 worker.online.lbfactor=1 And tomcat's conf/server.xml contains: <Connector port="7703" enableLookups="false" redirectPort="8443" protocol="AJP/1.3" URIEncoding="UTF-8" maxThreads="80" minSpareThreads="10" maxSpareThreads="15"/> I'm not sure what redirectPort is but I tried to telnet to that port and there's no one answering, so it shouldn't matter? Tomcat's webapps directory contains project.war and the server automatically deployed it under project directory which contains index.jsp and hello.html. The latter is for static debugging purposes. Now when I try to access http://project.demo.us.com/project/index.jsp, I get Tomcat's HTTP Status 404 - The requested resource () is not available. The same thing happens to hello.html so it's not working with static content either. Apache's access_log contains: 88.112.152.31 - - [10/Aug/2009:12:15:14 +0300] "GET /demo/index.jsp HTTP/1.1" 404 952 "-" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2" I couldn't find any mention of the request in Tomcat's logs. If I shutdown this specific tomcat, I no longer get Tomcat's 404 but Apache's 503 Service Temporarily Unavailable, so I should be configuring the correct Tomcat. Is there something obvious that I'm missing? Is there any place where I could find out what path the Tomcat is using to look for requested files?

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• Secret, unlogged, transparent, case-sensitive proxy in IIS6?

  - by Ian Boyd

  Does IIS have a secret, unlogged, transparent, case-sensitive proxy built into it? A file exists on the web-server: GET http://www.stackoverflow.com/javascript/ModifyQuoteArea.js HTTP/1.1 Accept: text/html, application/xhtml+xml, */* Accept-Language: en-US User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0) Accept-Encoding: gzip, deflate Connection: Keep-Alive Host: www.stackoverflow.com HTTP/1.1 200 OK Connection: Keep-Alive Content-Length: 29246 Date: Mon, 07 Mar 2011 14:20:07 GMT Content-Type: application/x-javascript ETag: "5a0a6178edacb1:1c51" Server: Microsoft-IIS/6.0 Last-Modified: Fri, 02 Tue 2010 17:03:32 GMT Accept-Ranges: bytes X-Powered-By: ASP.NET ... Problem is that a changes made to the file will not get served, the old (i.e. February of last year) version keeps getting served: HTTP/1.1 200 OK Connection: Keep-Alive Content-Length: 29246 Date: Mon, 07 Mar 2011 14:23:07 GMT Content-Type: application/x-javascript ETag: "5a0a6178edacb1:1c51" Server: Microsoft-IIS/6.0 Last-Modified: Fri, 02 Tue 2010 17:03:32 GMT Accept-Ranges: bytes X-Powered-By: ASP.NET ... The same old file gets served, even though we've: renamed the file deleted the file restarted IIS The request for this file does not appear in the IIS logs (e.g. C:\WINNT\System32\LogFiles\W3SVC7\) And this only happens from the outside (i.e. the internet). If you issue the request locally on the server, then you will: - get the current file (file there) - 404 (file renamed) - 404 (file deleted) But if i change the case of the requested resource, i.e.: GET http://www.stackoverflow.com/javascript/MoDiFyQuOtEArEa.js HTTP/1.1 Accept: text/html, application/xhtml+xml, */* Accept-Language: en-US User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0) Accept-Encoding: gzip, deflate Connection: Keep-Alive Host: www.stackoverflow.com Note: MoDiFyQuOtEArEa.js verses ModifyQuoteArea.js Then i do get the proper file (or get the 404 as i expect if the file is renamed or deleted). But any subsequent changes to the file will not show up until i change the case of the file i'm asking for. Checking the IIS logs all indicate that the (internet) requests are all coming the correct client on the internet (i.e. not from some intermediate proxy). Since the file doesn't exist on the hard drive anymore, i conclude that there is a proxy. The requests serviced from this proxy are not logged in the IIS logs. The requests for new files are logged, and from the client IP, not a proxy IP. The proxy is case sensitivie. This does not sound like something Microsoft, or IIS, would do: - a transparent proxy - case-sensitivie - unlogged - surviving restarts of IIS - surviving in a cache for hours i can't believe that our customer's IIS is doing these things. i'm assuming there is some other transparent proxy in front of IIS. Or, does IIS have a transparent, unlogged, case-sensitive, memory based, proxy, that caches content for at least 7 hours? (Come Monday morning, IIS is serving the correct file, unlogged).

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