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• USB Device Not Recognized

  - by Franky Chanyau

  Ok this one gets a little bit complicated but bare with me :D A client brought her computer in to be fixed about a week ago, she says she tried charging a new phone she bought from china and immediately after her usb keyboard and mouse stopped working (typical). I had a quick look at it but because I did not have time, I did a simple system restore and it seemed as if the issue was fixed. I promptly sent it back to her but a few days back she called saying that the issue has returned. Turns out the computer was riddled with some virus that also corrupted her XP install so I had to format the whole thing(yes I tried repairing). I hoped that the format would fix the keyboard and mouse issue but the whole thing has escalated and the computer will throw the "USB Device not recognized" error when I plug anything into the many usb ports it has. I have installed all the drivers (including the chip set drivers) for the pc and even tried the unplugging from the power for a while trick, still no luck. I am sure it is not a hardware issue, but may be wrong. This is way over my head. Can anyone help? Computer: HP Compaq DC7100, Intel Pentium 4, 512mb RAM OS: Windows XP Professional SP2

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• Is Gmail Being Blocked by my ISP (wait till you read this)?

  - by James

  This is the strangest thing I have ever encountered. I have a desktop on which I cannot access Gmail and also youtube sign in (I believe since youtube is owned by google they both use the same sign in system). So okay, maybe my ISP is blocking these for some reason or maybe my firewall is, or maybe there is something wrong with my connectivity, right? NO. On other computers that uses the same connection via a wireless router I can access both gmail and youtube sign in just fine. On this computer which doesn't have a wireless card and so I have to connect via Ethernet cable (connected to a USB converter since the Ethernet port doesn't work anymore) I can access all sites and services including things like aol and hotmail. But only when it comes to gmail, do I get complete and utter throttling. I even turned off my AV ad Firewall momentarily and no luck. The gmail ages starts to load and by mid point it just stays there loading and loading and loading... never ends. I tried everything, I reset the modem and router multiple times. I reinstalled my operating system from a vista to a windows 7 hoping a complete reinstall would solve the issue, but no luck. So can anyone for the life of them figure out why this could be? And yes, I am going to call my ISP but not to solve this issue, but to cancel them. I want to upgrade to cabel from DSL anyway. I didn't mention my ISP because I'm not sure if that is within the rules (if it's okay some one let me know and I will). P.S. All this happened one day, before gmail was perfectly accessible in this computer. I can't remember anything special that happened on that day prior to this. The only thing I can think of is, my ISP or Google itself is blocking this computer based on it's mac address, but I don't know if that's even done. Additional info: PC: Windows 7 Ultimate 32 bit Connection Type: DSL Connecting Medium: Ethernet cable via USB converter

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• CentOS Installation on a Cisco MCS 7800

  - by William

  I'm having some problems installing CentOS 5.5 Final (i386) onto my server, a Cisco MCS 7800. The problem comes very early into the installation. When the welcome screen comes up and gives you the option on how to boot into the DVD, I'll press enter to go into the graphical installer. The screen will then have a blinking cursor in the top left of the screen and will never go away (I thought that it just might need time but I let it sit for over 5 hours). I then booted into it again and tried using Linux Text thinking it was a problem with the graphical installer. That didn't work, same problem. Then I tried a DVD of RHEL 5 and got the same problem, both graphical and Linux text. At this point I think it's a hardware problem. The server has 2GB of ECC RAM, 1 Pentium 4 CPU @ 3.06GHZ and 2 WD Hard Drives (80GB) configured for RAID 0. (There is also an option in the BIOS for what OS type and that is set to Linux.) If anyone has any idea what is going on, it would be helpful. Edit Typing "text" doesn't change a thing. Still stuck at the blinking cursor. I looked it up and it's really the same thing as typing "linux text", which as stated in the first part of my question, I've already done.

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• Is there an SSL equivelent to an ssh agent?

  - by Matthew J Morrison

  Here is my situation: There are a number of developers who all need to have access to be able to install ruby gems and python eggs from a remote source. Currently, we have a server inside our firewall that hosts the gems and eggs. We now want the ability to be able to install things hosted on that server outside of our firewall. Since some of the gems and eggs that we host are proprietary I would like to somewhat lock access to that machine down, as unobtrusively as possible to the developers. My first thought was using something like ssh keys. So, I spent some time looking at SSL mutual authentication. I was able to get everything set up and working correctly, testing with curl, but the unfortunate thing was that I had to pass extra arguments to curl so it knows about the certificate, key and certificate authority. I was wondering if there is anything like the ssh agent that I can set up to provide that information automatically so that I can push the certificates and keys to the developer's machines so the developers don't have to log in or provide keys each time they try to install something. Another thing that I want to avoid is having to modify the 'gem' command and the 'pip' command to provide keys when they make the http connection. Any other suggestions that may solve this problem (not related to ssl mutual auth) are also welcome. EDIT: I've been continuing to research this and I came across stunnel. I think this may be what I'm looking for, any feedback regarding stunnel would also be great!

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• RDP or SSH connection trough Windows 2008 server VPN hang after a while

  - by xt4fs

  I have been experiencing a very strange issue with our VPN setup on Windows Server 2008. That server is running as a Xen Virtual Machine. We use it for two purposes, permit our mobile workers to connect to another server hosted somewhere else that only allow that ip, and use it to RDP or ssh to many other virtual machine on the same server. The server has no performance issue and still a load of memory free. All other virtual machine has no problem whatsoever. Many of those virtual machine have public IP (web servers) and all their firewall are set to allow only ssh connection or RDP connection from their local interface. When I am connecting directly with either ssh or RDP to one of the other virtual machine everything run without any issues. However, when I am doing so through the VPN after some time the connection just hang, it usually continue after some time (5 or 10 minutes). It seems as more there is network usage more often it happen to a point where it is completely unusable. The worst thing I can do to hang it faster is to actually ping the vpn client IP from the local network, after some time the latency increase until it hang. This happen even if I do RDP to the local ip of the VPN server trough the VPN. The server report no problem and if I disconnect to the vpn and reconnect right away everything is alright. There is nothing wrong in the VPN server log. I have taught at the beginning that it could have been an issue with the Host server so I try to RDP,ssh directly to the guest and I have experience no issue while doing this, so it really seems to be a problem with the VPN server on Windows server 2008. Another very weird thing is it does not seems to be of any issue if you only do Internet (NAT) without trying to connect to any local ips.

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• How to convert an MKV to AVI with minimal loss

  - by Linux Jedi

  To convert an MKV to AVI, I do two things. The first thing I do is this: ffmpeg -i filename.mkv -vcodec copy -acodec copy output.avi This converts the MKV to an AVI, but the problem is that the video does not play smoothly for some reason. That's fine, because if I do one more thing it gets fixed: ffmpeg -i output.avi -vcodec mpeg4 -b 4000k -acodec mp2 -ab 320k converted.avi After I do this then the file plays without problem. I had success doing it this way for one file, but then I tried it on another file, and there is a slight, but noticeable loss in video quality. This is the output I get when doing the second step: FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers built on Dec 29 2010 18:02:10 with gcc 4.2.1 (Apple Inc. build 5664) configuration: libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2 libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.11. 0 / 0.11. 0 Seems stream 0 codec frame rate differs from container frame rate: 359.00 (359/1) -> 29.92 (359/12) Input #0, avi, from 'output.avi': Metadata: ISFT : Lavf52.64.2 Duration: 00:04:17.21, start: 0.000000, bitrate: 3074 kb/s Stream #0.0: Video: mpeg4, yuv420p, 704x480 [PAR 229:189 DAR 5038:2835], 29.92 fps, 29.92 tbr, 29.92 tbn, 359 tbc Stream #0.1: Audio: vorbis, 48000 Hz, stereo, s16 Output #0, avi, to 'nidome_no_kanojo.avi': Metadata: ISFT : Lavf52.64.2 Stream #0.0: Video: mpeg4, yuv420p, 704x480 [PAR 229:189 DAR 5038:2835], q=2-31, 4000 kb/s, 29.92 tbn, 29.92 tbc Stream #0.1: Audio: mp2, 48000 Hz, stereo, s16, 320 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 I just used arbitrarily large settings on the second step and it worked nicely before but not in this case. What settings should I use?

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• What is the replacement of the floppy

  - by alexanderpas

  While CD (and to an lesser extend DVD) disks have reached the price-point of the floppy, they have one significant downside, it is WORM (Write-Once Read-Many) media, allowing it to be used only one single time, and you need to be explicit in writing the data to the actual media (you need to burn it.) While CD-RW solves the "use only once" problem, it is still EWORM (Erasable Write-Once Read-Many) media, which still means you need to be explicit in writing the data to the actual media (you still need to burn it.), and also, you still need to be very explicit in erasing it. (simple delete is not possible.) Okay, we can use a CD-RW in Packet Writing mode, however the downside to that, is that this mode is not very universal, and also, not the native mode of the media. Now, while USB-sticks and SD-cards may not have the poblems of the CD, they have a whole other kind of problem: their PRICE! USB-sticks and SD cards are generally 10 to 100 times as expensive as diskettes per piece. SD-cards, in addition have an added problem, because they need a reader to operate. While it is a very standard thing, it is not default equipment on the computer like the CD drive or USB port (or historically the diskette drive). You wouldn't give out an USB stick or SD card with a 100 kB text file, not caring weither you would get it back or not. So, to recap: CD & DVD are basically WORM media. SD cards and USB sticks are relatively expensive. SD cards also needs special readers. Diskettes have a very low data-rate Diskettes have a very low storage capacity. Now, is there a media out there that solves all these problems, or is there a way to get (very) small USB sticks or SD cards for a very low price (as they're the closest thing to diskette).

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• APC (php accelerator). What situations should I use this?

  - by matthewsteiner

  So I've just got a small vps. I've installed apc, which sped up normal pages by 20% - 30%. I was reading about memcached and came to the conclusion that I can use apc for the same thing (caching objects from database results) if I'm not distributing over other servers. Since I only have the one server, apc will be just as beneficial for caching things in memory. I'm still in development mode, and I'm sure it's hard to tell what would be best for production mode. The thing is, my database queries seem pretty fast (between .0008 and .02). None of my pages are way database intensive. Would it be beneficial to me to cache results in memory? If the database is running well right now, is it going to be having a hard time later? Also, is connecting to the database at all something that costs speed (even if I cache most of my queries, every page has to have a little database interaction for session data). So, basically if I have a limited ram, and one machine, will using apc rather than just letting the database be uncached be much faster? Ideas?

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• why does mysql have so many more open and fragmented tables than tables in the DB?

  - by kswift

  I've been working making our database run a little smoother and had good results over the past week. But there are still some things I dont understand. For one thing, the database has 25 tables. But mysql status shows 512 are open: mysqladmin status Uptime: 212854 Threads: 1 Questions: 43041 Slow queries: 7 Opens: 2605 Flush tables: 1 Open tables: 512 Queries per second avg: 0.202 I've read that isam opens extra file descriptors and a few other reasons why the number of open tables might be higher than 25, but I am guessing that 512 is not a good thing. Any suggestions on why this might be or what I should be looking into? I've also been using mysqltuner and its been helpful. But it has consistently listed the number of fragmented tables at 207. In phpmyadmin I've selected all the tables and optimized them several times. It hasn't reduced the number of fragmented tables that mysqltuner reports. I think I am missing some important concept about how this all works. Does anyone have any suggestions to point me in the right direction or narrow down google searches or just generally help me be less clueless? Thanks!

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• IPSec tunnelling with ISA Server 2000...

  - by Izhido

  Believe it or not, our corporate network still uses ISA Server 2000 (in a Windows Server 2003 machine) to enable / control Internet access to / from it. I was asked recently to configure that ISA Server to create a site-to-site VPN for a new branch in a office about 25 km. away from it. The idea is basically to enable not only computers, but also Palm devices (WiFi-enabled, of course), to be able to see other computers in both sites. I was also told that a simple VPN-enabled wireless AP/router (in this case, a Cisco WRV210 unit) should be enough to establish communications with the main office. To be fair, the router looks easy to configure; it was confusing at first, but further understanding of how site-to-site VPNs work cleared all doubts about it. Now I need to make modifications to our ISA Server in order to recognize the newly installed & configured "remote" VPN site. Thing is, either my Googling skills are pathethically horrible, or there doesn't seem to be much (or any, at all) information about how to configure an ISA Server 2000 for this purpose. Lots of stuff on 2004, of course; also, I think I saw something for 2006. But nothing I could find about 2000. Reading about 2004, it seems that the only way I can do site-on-site with a Cisco router (read: a non-ISA-Server machine) is through something they call a "IPSec tunnel". Fair enough. However, I can't figure for the life of me how could I even start to find, leave alone configure, such a thing. Do you, people, happen to know how to do IPSec tunelling on a ISA Server 2000, so I can connect to a Cisco WRV210 VPN-enabled router, and build a site-to-site VPN for both networks? Or is this not possible at all? (Meaning I should change anything in this configuration to make it work...)

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• Windows Photo Viewer can't open this picture because you don't have the correct permissions to access the file location

  - by Software Monkey

  My system in Windows 7 and fully up to date with all patches and options (except for Microsoft Silverlight, which I refuse to install). I get this error whenever I try to open an image using Windows Photo Viewer, such as when previewing from Explorer or when opening an image attachment to an email. I have already verified correct permissions to the file and all folders in the path. The strange thing is that every other program I have seems to open the images fine, including "Slideshow" from Windows Explorer. Even more strange, in WPV there is an "Open" menu that lists the other programs for images including GIMP and MS Paint and they open the very file that WPV is complaining about just fine. That should eliminate permissions as being the problem, especially since (logically at least) they are read/write while WPV is read-only. I have even edited and saved the images that WPV does not open. I am out of ideas, and searching for answer on the Web has resulted only in the same tired repitition of some flavor of "take ownership and reset permissions for the entire drive", which I have already done. And which is counter-indicated by the fact that only Windows Photo Viewer seems to have a problem. The one thing which is slightly unusual is that for normal files they are all on a second HDD mounted into C:, however for email attachments the temporary folder is C:\Temp\, which is directly on that drive.

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• How to debug silent hang on shutdown of Solaris 10?

  - by jblaine

  We're experiencing a mysterious hang on shutdown of a newly-imaged Oracle/Sun Solaris 10 SPARC box. It is repeatable (in the same spot ... from what we can tell). We let it try to work itself out multiple times for 5-10 minutes and it never progressed. I've never seen this happen before. The last thing displayed on the console is that syslogd was sent signal 15. Prior to us disabling snmpdx on the box, the last thing on the console was that snmpdx was sent signal 15 (after syslogd was sent signal 15). While very rare to find, in Solaris days past, I'd have a better idea from experience where the problem might be, and could then narrow things down further with silly (but effective) debugging echo statments in /etc/*.d scripts. With SMF in the picture, I'm not really quite sure where to start. We forced a crash dump via sync at the {ok} prompt for later analysis, and then let the box come up because it's a production server and our scheduled outage window was closing. /var/adm/messages shows nothing of use. How would you debug this situation? mdb ps of the savecore shows the following processes were running at hang time (afsd is the OpenAFS client and that many are expected): > > ::ps S PID PPID PGID SID UID FLAGS ADDR NAME R 0 0 0 0 0 0x00000001 00000000018387c0 sched R 108 0 0 0 0 0x00020001 00000600110fe010 zpool-silmaril-p R 3 0 0 0 0 0x00020001 0000060010b29848 fsflush R 2 0 0 0 0 0x00020001 0000060010b2a468 pageout R 1 0 0 0 0 0x4a024000 0000060010b2b088 init R 1327 1 1327 329 0 0x4a024002 00000600176ab0c0 reboot R 747 1 7 7 0 0x42020001 0000060017f9d0e0 afsd R 749 1 7 7 0 0x42020001 00000600180104d0 afsd R 752 1 7 7 0 0x42020001 0000060017cb44b8 afsd R 754 1 7 7 0 0x42020001 0000060017fc8068 afsd R 756 1 7 7 0 0x42020001 0000060017fcb0e8 afsd R 760 1 7 7 0 0x42020001 00000600177f4048 afsd R 762 1 7 7 0 0x42020001 000006001800f8b0 afsd R 764 1 7 7 0 0x42020001 000006001800ec90 afsd R 378 1 378 378 0 0x42020000 0000060013aee480 inetd R 7 1 7 7 0 0x42020000 0000060010b28008 svc.startd R 329 7 329 329 0 0x4a024000 00000600110ff850 sh Z 317 7 317 317 0 0x4a014002 0000060013b3a490 sac

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• How do I install a different OS on a Compaq Presario cq56 with preinstalled SuSE 11?

  - by McCoy

  Thing is, I don't have a clue of Linux systems, I usually use WinXP. Bought a notebook with SuSE 11 on it, because I have my XP licence and thought I could install that if I found the chipset drivers for the hardware (which I'm not completely sure I have the right versions of). Then I thought I'd give it a shot with the SuSE, looked nice enough. But I can't get my external hd to work (tried force mount) and the banshee doesn't do anything like playing video. Since that is one of the two main purposes of this notebook, I need to get that to work. Tried downloading VLC player, but that only works with SuSE 11.1 upwards. So I downloaded a SuSE 11.3 and burned the iso. But surprise, no way the notebook would boot from cd. Same with the XP cd (considered setting up a dual boot). And no, I can't get to BIOS to reset to default, either. So I can basically do nothing else than going online with this thing and that's not enough for me (gamer in withdrawal, yikes!). I need at least to get to my firefox profile on the external hd and be able to watch video. Can somebody please help me? I think at this point I'd prefer to install XP and MAYBE the SuSE 11.3 after that. I'm not a native speaker, so please speak plainly, thanks. :) Edit: if this is impossible, could someone please help me with the external hd mount and video playback? Edit: Found out how to boot from cd by now. But still no XP, because I get bluescreen after bluescreen while setup is loading files. I guess it's the missing SATA drivers...

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• Windows 7 Won't Boot

  - by Vie

  I recently built a new computer, my fifth one. ASUS Maximus III Formula LGA 1156 Intel P55 ATX Motherboard EVGA 01G-P3-1452-TR GeForce GTS 450 Superclocked 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Video Card COOLMAX RM-1000B 1000W ATX psu Intel Core i7-875K lynnfield 2.93GHz LGA 1156 95w Quad-Core unlocked processor G.SKILL Ripjaws Series 16 (4x4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) memory WD VelociRaptor WD3000GLFS 300gb 10000 RPM SATA 3.0Gb/s Hard Drive Sony Optiarc CD/DVD Burner model AD-7261S-0B LightScribe Windows 7 Home Premium 64-bit It gets hung up on the starting windows screen. When I went to install the OS it did the same thing wouldn't go past the windows logo, so I put the new HDD into my old computer and installed windows 7 thinking it was just an installer error. Put the fully installed HDD back into my new machine and it still gets stuck on the starting windows screen. I've tried most everything I've looked up. Disabled USB, Disabled Turbo Boost, Disabled everything that wasn't essential(just about every configuration I can think of), took it apart and put it back together, took all the ram out save one 4g stick(wouldn't even boot when I did this), did a memory scan which came back successful, I don't know what could be wrong. Only thing I can think of is a compatibility issue somewhere, but I've ran over it again and again and I don't know where there would be an issue like that. Need Backup! .<

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• Getting rid of your server in a small business environment

  - by andygeers

  In a small business environment, is it still necessary to have a central server? Speaking for my own company (a small charity with about 12 employees) we use our server (Windows Server 2003) for the following: Email via Microsoft Exchange Central storage Acting as a print server User authentication / Active Directory There are significant costs associated with running a server like this: Electricity, first for the server itself then for the air conditioning required (this thing pumps out a lot of heat) Noise (of which there is a lot) IT support bills (both Windows Server and Exchange are pretty complicated, and there are many ways they can go wrong) I've found ways to replace many of these functions with cheaper (better?) alternatives: Google Apps / GMail is a clear win for us: we have so many spam related problems it's not even funny, and Outlook is dog slow on our aging computers You can buy networked storage devices with built in print servers, such as the Netgear ReadyNAS™ RND4210 that would allow us to store/share all of our documents, and allow us to access printers over the network The only thing that I can't figure out how to do away with is the authentication side of things - it seems to me that if we got rid of our server, you'd essentially have a bunch of independent PCs that had no shared pool of user accounts / no central administrator. Is that right? Does that matter? Am I missing any other good reasons to keep a central server? Does anybody know of any good, cost-effective ways of achieving the same end but without the expensive central server?

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• Can't upgrade NVIDIA GeForce 310M display driver on Acer Aspire 5745PG

  - by Emerson

  I've been for days already trying to update my video driver. I have an Acer Aspire 5745PG with a "NVIDIA GeForce 310M" board, and I was trying to run Sony Vegas video editor with Boris Continunn plugins. It happened that some of the plugins, like BCC Text Extrude wouldn't work, showing the message "Insufficient depth resolution to run Blue". I then read somewhere that updating the display driver would do the trick. That was when my nightmares started, I lost already good 3 nights trying to sort this out, without success :( The display driver that was before (and that I current have after restoring) was the version 8.16.11.8997. First thing I tried was downloading the 8.17.12.6619 driver directly from Acer, which was shown as the latest version from Acer website: http://support.acer.com/product/default.aspx?modelId=2466 Running it would say "Diver Package Failure - Setup failed to read the required Display Driver to be used with this package" I then tried directly the NVIDIA own driver, which the latest was version 296.10: http://us.download.nvidia.com/Windows/296.10/296.10-notebook-win7-winvista-64bit-international-whql.exe That gave me similar error message :/ So after some researching I found out that some people had the same issue and they had to change the configuration file to allow the installer to recognize this NVIDIA board: http://forums.nvidia.com/index.php?showtopic=222904 That topic said to look for the "Device Instance Id" property of the "NVIDIA GeForce 310M" display , which I couldn't find, instead I found the "Hardware Id", which seemed to be the right one. I followed the instructions and changed the inf file first for the Acer installation, and after for the NVIDIA own driver. It actually managed to go ahead with the installation in both instances, but the only thing I got was a black screen, while the computer still apeared to be running fine. I had to hard reset, and then it would come back with generic vga driver. I could only get my display back using the recovery function. I imagine thousands of this notebook was sold, and it can't have its driver updated?? Could someone help me with this?? Thanks Echo

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• Setting up VPN with Snow Leopard Server and Linksys router

  - by SueP

  I'd like to get VPN going so I can log in to the office securely from home. I'm using Snow Leopard machines everywhere, and currently have Airport Extremes set up at home and at the office. I have a mac mini with Snow Leopard Server that I'm going to move to the office to act as my server. I just bought a Linksys 4-port router because it says it does VPN (model RVS4000). My problem is, I don't have a clue how to set this thing up, and the more reading I do, the more confused I get. Do I need two of these routers, one at each end? My laptop and iPad claim they can do VPN, so I was assuming I only needed one VPN router? At this point, I literally don't know what questions to ask, or where to plug this thing in. Presumably, between the modem and the airport, but...? If somebody can walk me thru some really basic setup, I'd be very grateful. Right now, I feel like going outside and screaming for a while. But that might attract the local cougar, and after the prints I saw on the arena this afternoon, I don't want to draw its attention. :-)

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• iSCSI performance questions

  - by RyanLambert

  Hi everyone, apologies for the long-winded post in advance... Attempting to troubleshoot some iSCSI sluggishness on a brand new vSphere deployment (still in test). Layout is as such: 3 VSphere hosts, each with 2x 10GB NICs plugged into a pair of Nexus 5020s with a 10gig back-to-back between them. NICs are port-channeled in an active/active redundant fashion (using vPC-mac pinning for those of you familiar with N1KV) Both NICs carry service console, vmotion, iSCSI, and guest traffic. iSCSI is on a single subnet/single VLAN that is not routed through our IP network (strictly layer2) Had this been a 1gig deployment, we probably would have split the iSCSI traffic off onto separate NICs, but the price/port gets rather ridiculous when you start throwing 4+ NICs to a server in a 10gigabit infrastructure, and I'm not really convinced it's necessary. Open to dialogue/tech facts re: this, though. At this point even a single VM guest will boot slowly to iSCSI storage (EMC CX4 on the same Nexus 5020 10gig switches), and restores of VMs from iSCSI take about twice as long as we'd expect them to. Our server folks mentioned that if we split the iSCSI off onto its own NIC, performance seems significantly better. From a network perspective, I've run through the variables I can think of (port configuration errors, MTU problems, congestion etc.) and I'm coming up dry. There really is no other traffic on these hosts other than the very specific test being performed at the time. Important thing to note is that guest traffic works just fine... it seems storage is the only thing affected by whatever gremlin exists. Concluding that we're not 'overutilizing' the network infrastructure since we're doing hardly anything, I'm just looking for some helpful tips/ideas we can use to resolve this... preferably without hurling extra 10gig NICs that are going to sit around 10% utilization while we've got 70+% left on our others.

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• Manipulating IIS7 Configuration with Powershell

  - by John Price

  I'm trying to script some IIS7 setup tasks in PowerShell using the WebAdministration module. I'm good with setting simple properties, but am having some trouble when it comes to dealing with collections of elements in the config files. As an immediate, example, I want to have application pools recycle on a given schedule, and the schedule is a collection of times. When I set this up via the IIS management console, the relevant config section looks like this: <add name="CVSupportAppPool"> <recycling> <periodicRestart memory="1024" time="00:00:00"> <schedule> <clear /> <add value="03:31:00" /> </schedule> </periodicRestart> </recycling> </add> In my script I would like to be able to accomplish the same thing, and I have the following two lines: #clear any pre-existing schedule Clear-WebConfiguration "/system.applicationHost/applicationPools/add[@name='$($appPool.Name)']/recycling/periodicRestart/schedule" #add the new schedule Add-WebConfiguration "/system.applicationHost/applicationPools/add[@name='$($appPool.Name)']/recycling/periodicRestart/schedule" -value (New-TimeSpan -h 3 -m 31) That does almost the same thing, but the resulting XML lacks the <clear/> element that is created with via the GUI, which I believe is necessary to avoid inheriting any default values. This sort of collection (with "add", "remove", and "clear" elements) seems to be fairly standard in the config files, but I can't seem to find any good documentation on how to interact with them consistently.

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• Can any iSCSI NAS appliance replicate / clone a LUN to an external drive?

  - by Boden

  I would like to backup using Windows Imaging to some kind of NAS appliance. I believe this will require the NAS to support iSCSI. I would then like the appliance to support the replication of the iSCSI LUN to an external eSATA or USB disk connected directly to the appliance. I've found plenty of NAS appliances that can do iSCSI and replicate to an external drive, but none that I've found thus far can do both at once. That is, the devices can do iSCSI, but then the replication feature doesn't work. The idea here is to backup to an appliance located in a secure office far away from the server room. Offsite backups to external hard drive could be managed from the appliance. The benefits of such a setup would be: 1) very unlikely that fire or random theft would affect both server-room backup and "remote" backup appliance 2) offsite backups could be managed by multiple trusted people without granting access to server room 3) Windows imaging provides poor man's deduplication, so each backup volume can contain a decent backup history. I understand why this would be a non-trivial thing to implement, but I'm wondering if such a thing exists? Preferably a tabletop, low to medium cost device. Alternative solutions welcome. NOTE: I'm backing up very few but very large files, so file replication is not a good option.

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• Home Sharing and Remote on iTunes causing firewall nags

  - by BoltClock

  It seems that enabling Home Sharing and/or hooking up my iPhone's Remote to iTunes causes Mac OS X Snow Leopard's firewall to freak out and keep nagging every time I launch iTunes to ask if I'd like it to accept incoming connections. If I turn off Home Sharing and forget all Remotes, the nag dialog no longer comes up. I could also disable the firewall, but I think that's a silly thing to do. iTunes is already in the firewall whitelist, so the only thing I know that could cause Mac OS X to nag is a bad application bundle code signature. I checked with this Terminal command: $ codesign -vvv /Applications/iTunes.app/ And sure enough, this is what it outputs: /Applications/iTunes.app/: a sealed resource is missing or invalid /Applications/iTunes.app/Contents/Resources/English.lproj/AutofillSettings.nib/objects.xib: resource added /Applications/iTunes.app/Contents/Resources/English.lproj/iTunesDJSettings.nib/objects.xib: resource added /Applications/iTunes.app/Contents/Resources/English.lproj/MobilePhonePrefs.nib/objects.xib: resource added /Applications/iTunes.app/Contents/Resources/English.lproj/MobilePhoneSetup.nib/objects.xib: resource added /Applications/iTunes.app/Contents/Resources/English.lproj/UniversalAccess.nib/objects.xib: resource added I've tried reinstalling iTunes as suggested by this answer, but Mac OS X still nags about incoming connections and the exact same output is generated when I run the above command again. On my PC, Windows Firewall has never nagged whenever I turn on Home Sharing and hook up Remote on my iPhone. Both computers use iTunes 9.2.1. My Mac runs Mac OS X 10.6.4. Is there anything special I need to do that I might have missed? Or how do I resolve the issue? EDIT: I've updated to iTunes 10, but the nags on my Mac are still there and only go away if I turn off Home Sharing and Remote. EDIT 2: I've updated to Remote 2.0 on my iPhone, but the firewall nags are persisting. Has anyone else had this firewall issue at all?

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• How to find out what is causing a slow down of the application on this server?

  - by Jan P.

  This is not the typical serverfault question, but I'm out of ideas and don't know where else to go. If there are better places to ask this, just point me there in the comments. Thanks. Situation We have this web application that uses Zend Framework, so runs in PHP on an Apache web server. We use MySQL for data storage and memcached for object caching. The application has a very unique usage and load pattern. It is a mobile web application where every full hour a cronjob looks through the database for users that have some information waiting or action to do and sends this information to a (external) notification server, that pushes these notifications to them. After the users get these notifications, the go to the app and use it, mostly for a very short time. An hour later, same thing happens. Problem In the last few weeks usage of the application really started to grow. In the last few days we encountered very high load and doubling of application response times during and after the sending of these notifications (so basically every hour). The server doesn't crash or stop responding to requests, it just gets slower and slower and often takes 20 minutes to recover - until the same thing starts again at the full hour. We have extensive monitoring in place (New Relic, collectd) but I can't figure out what's wrong; I can't find the bottlekneck. That's where you come in: Can you help me figure out what's wrong and maybe how to fix it? Additional information The server is a 16 core Intel Xeon (8 cores with hyperthreading, I think) and 12GB RAM running Ubuntu 10.04 (Linux 3.2.4-20120307 x86_64). Apache is 2.2.x and PHP is Version 5.3.2-1ubuntu4.11. If any configuration information would help analyze the problem, just comment and I will add it. Graphs info phpinfo() apc status memcache status collectd Processes CPU Apache Load MySQL Vmem Disk New Relic Application performance Server overview Processes Network Disks (Sorry the graphs are gifs and not the same time period, but I think the most important info is in there)

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• 500 Error when logining into subdomain using codeigniter

  - by itsdanprice

  I have a website that has been setup and working fine for ages. It's built using Code Igniter. It's run using .htaccess files to restrict access and hide urls. All fine. Until a couple of days ago when we try to access http://admin.dealersupport.co.uk we get a 500 error (this is the back end of the site, held in a seperate subdomain.) Nothing else has changed on the server. I have tried restoring from a back up from when I know it was working. The problem persists. The only thing I can think of is that we recently upgraded to Plesk 11.0.9 and since then we have been seeing some Apache instabilities. The only thing that is thrown up by the error logs is this: Wed Nov 21 08:40:17 2012] [error] [client 94.31.24.129] Options FollowSymLinks or SymLinksIfOwnerMatch is off which implies that RewriteRule directive is forbidden: /var/www/vhosts /dealersupport.co.uk/admin/index.pl, referer: http://admin.dealersupport.co.uk/login I have now added this to my .htaccess files Options +FollowSymLinks +SymLinksIfOwnerMatch RewriteEngine On And that seems to have eliminated that error from the error logs, but we are still getting a 500 error when we have logged into the backend. Can anyone help?

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• windows 7 turns off itself everyday at about 9am

  - by Radek

  I was given this comp at work and after a week or so this strange thing started to happen in the middle of doing something :-( It turns off itself at about 9.10am every morning Just once a day and it works fine after it had it little nap. it happens both if the comp was on all night or I turned it off before leaving the office. I tried to swapped the memory as I was told that there was an issue with memory. But moving or removing any memory did not make any difference. I am not aware that I would install any program that could cause that. I installed AVG and set it up to do every day scan about 8am + if restart is needed it requires user confirmation. 'The Software Protection service has stopped' few minutes before it turned off itself but it happened also at other times without the computer turned off. I turned off Windows automatic updates as the first thing when I got the comp configuration Windows 7 Ultimate Intel Core2 Quad Q9550 at 2.8GH, 8GB RAM ST31000528AS Barracuda 7200.12 SATA 3Gb/s 1TB Update Below message are logged when I turn the comp on again. Message 1: The previous system shutdown at 9:08:54 AM on ?6/?29/?2010 was unexpected. Message 2: Level:Critical Source: Kernel Power EventID 41 Task Category (63) The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. Log after manual restart Update 2 (task scheduler)

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• Django apache + mod_wsgi with virtualenv

  - by ArgsKwargs

  I have some questions running multiple Django sites on a VPS I have a server that uses openPanel to automatically create VirtualHosts within apache2. My ideal situation is that I would have multiple virtualenvs with different dependencies installed so the python dist-packages directory isn't contaminated for different Django sites. For example: /home/user/virtualenv1 /home/user/virtualenv2 My django applications reside at /var/www, so For example: /var/www/djangosite1 /var/www/djangosite2 Now I've read upon openPanel docs and figured out the best thing todo is create a django.conf file inside the mydomain.com.inc folder, which looks something like: /etc/apache2/openpanel.d/mydomain.com.inc/django.conf DocumentRoot /var/www/djangosite1/project WSGIScriptAlias / /var/www/djangosite1/project/wsgi.py WSGIDaemonProcess mydomain python-path=/home/user/virtualenv1/lib/python2.6/site-packages <Directory /var/www/djangosite1/project> Order allow,deny Allow from all </Directory> Alias /static /var/www/djangosite1/project/static-root Now my problem is that this setup seems unable to find the virtualenv site-packages thus not recognizing any dependencies available in the given virtualenv Also, commenting out this line doesn't seem to break or change a thing: WSGIDaemonProcess mydomain python-path=/home/user/virtualenv1/lib/python2.6/site-packages For example: > service apache2 start ImportError: No module named South When I install South outside the virtualenv everything works

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