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  • What are the best options for a root filesystem hosted on SSD under Linux

    - by stsquad
    I'm working on an embedded system which is going to be booting and hosting it's rootfs on an SSD disk. We are currently looking at using Intel X-18M SSDs. The file system structure will have a fairly static /usr section (modulo software upgrades) and an active /var and /var/log for maintaining state and logging. Given the wear-levelling done by the underlying flash does having separate partitions help or hinder? As modern SSDs appear as straight block devices and hide their mapping magic behind their firmware is there any point trying to optimise the choice of file-system that sits on-top of the SSD? Finally does enable SMART monitoring make any sense in this context or are their SSD specific ways of determining the underlying health of the storage hardware?

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  • Log - Server kernel: INFO: task httpd:000000 blocked for more than 120 seconds

    - by valter
    Almost everyday my server is crashing due to hight server load, and even restarting apache or mysql can't solve the problem. I need to reboot the server to solve, or it crash again due to the high load. The log system records something like this when it crashes: Aug 11 18:33:53 server kernel: INFO: task httpd:20008 blocked for more than 120 seconds. Aug 11 18:33:53 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 11 18:33:53 server kernel: httpd D ffffffff801538ac 0 20008 5816 20066 19809 (NOTLB) Aug 11 18:33:53 server kernel: ffff81025a299dc8 0000000000000082 ffff81033b4c0740 ffffffff80009a14 Aug 11 18:33:53 server kernel: ffff8101063f8d80 0000000000000009 ffff8100b758f7e0 ffff8101c57187e0 Aug 11 18:33:53 server kernel: 00009436d4100b6c 000000000001d50f ffff8100b758f9c8 000000083b531588 Aug 11 18:33:53 server kernel: Call Trace: Aug 11 18:33:53 server kernel: [<ffffffff80009a14>] __link_path_walk+0x173/0xfb9 Aug 11 18:33:53 server kernel: [<ffffffff8002cc16>] mntput_no_expire+0x19/0x89 Aug 11 18:33:53 server kernel: [<ffffffff80063c4f>] __mutex_lock_slowpath+0x60/0x9b Aug 11 18:33:53 server kernel: [<ffffffff80023908>] __path_lookup_intent_open+0x56/0x97 Aug 11 18:33:53 server kernel: [<ffffffff80063c99>] .text.lock.mutex+0xf/0x14 Aug 11 18:33:53 server kernel: [<ffffffff8001b21f>] open_namei+0xea/0x712 Aug 11 18:33:54 server kernel: [<ffffffff8002768a>] do_filp_open+0x1c/0x38 Aug 11 18:33:54 server kernel: Firewall: *UDP_IN Blocked* IN=eth1 OUT= MAC=ff:ff:ff:ff:ff:ff:00:30:48:9e:6e:99:08:00 SRC=208.43.135.158 DST=255.255.255.255 LEN=151 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=38354 DPT=6112 LEN=131 Aug 11 18:33:54 server kernel: [<ffffffff8001a061>] do_sys_open+0x44/0xbe Aug 11 18:33:54 server kernel: [<ffffffff8005d28d>] tracesys+0xd5/0xe0 I googled a lot trying to find a solution. But it looks that the solution is just to update the kernel or disk driver, thinks that I don't know how to do. In this url http://bugs.centos.org/view.php?id=4515 a lot o people report similar problems, except the fact that they are not related to httpd like mine. According to one member, one solution would be to add "elevator=noop " to /etc/grub.conf like in this example: title CentOS (2.6.18-238.12.1.el5xen) root (hd0,0) kernel /vmlinuz-2.6.18-238.12.1.el5xen ro root=/dev/VolGroup00/LogVol00 elevator=noop initrd /initrd-2.6.18-238.12.1.el5xen.img Would this really solve the problem? My disk are working in RAID. Can this cause some problem to my server? Is there any other solution?

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  • What resources are best for staying current about information security?

    - by dr.pooter
    What types of sites do you visit, on a regular basis, to stay current on information security issues? Some examples from my list include: http://isc.sans.org/ http://www.kaspersky.com/viruswatch3 http://www.schneier.com/blog/ http://blog.fireeye.com/research/ As well as following the security heavyweights on twitter. I'm curious to hear what resources you recommend for daily monitoring. Anything specific to particular operating systems or other software. Are mailing lists still considered valuable. My goal would be to trim the cruft of all the things I'm currently subscribed to and focus on the essentials.

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  • XP Pro product keys

    - by Bill
    I have a very serious problem. After my XP Home OS was trashed by rogue software - a trial of a thing named TuneUp - I did a clean install, including HDD reformat of Windows XP Pro from a purchased OEM disk. This was Service Pack 2, subsequently upgraded to SP3. I had conclusively mislaid the product key. I had to access data on the machine VERY urgently and I did not then know that under some circumstances Microsoft might agree to provide a replacement. I found what I now know must have been a pirate key on the Net which enabled installation but NOT activation. This of course left me functional but 30 days before meltdown - about 20 days left as I write this. Various retailers want around £100 for retail with matching product key. - this would be paying twice over just to continue use on the same computer. I have neither need nor intention of installing XP Pro on any other computer. I have tried a number of applications claiming to deal with this problem but none of them work. A Belarc profile shows that the pirate key has replaced the original one on the system. I have now found two keys, one of which might be the original, but neither work. I am about to upgrade the HDD and it looks like I will just be passing the problem on when I install XP. I have retrieved a key from the disk, but it is seemingly one Microsoft use in production and does not work. It is 76487-OEM-0015242-71798. The keys I have, one of which which might or might not be the original, are CD87T-HFP4G-V7X7H-8VY68-W7D7M and FC8GV-8Y7G7-XKD7P-Y47XF-P829W (or P819W - I believe it to be the latter, but the box will not accept it). The pirate key which has enabled this install and which is now stored on the system but will not activate is QQHHK-T4DKG-74KG7-BQB9G-W47KG. In these circumstances is it likely that Microsoft would issue a replacement? Is there any other solution? I am not trying to defraud anyone, just to keep on using the product I legitimately bought. Bill

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  • norton ghost error in virtual box

    - by Nrew
    I'm trying out norton ghost on my virtual box guest os windows xp, dual boot with fedora 12. I've boot norton ghost iso. And tried to backup the partition where win xp and fedora is installed but I get this error. I'm backing it up on another virtual disk created through virtual box. What might be the cause of this error, and how to solve it.

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  • Making Linux smart about partition or filesystem moves with a UUID selection dialog?

    - by Luke Stanley
    It seems to me a major part of frustration n00bs have with Linux is due to UUID changes not matching peoples intuition and just working. Does anyone know a way of making GRUB and /etc/fstab just ASK PEOPLE about UUID changes, instead of just failing after people try moving hard disk? Could this be done in Bash or such? Is there a different flag or two somewhere we could simply change? Seems like this, if made to work in common practice could be a major advantage.

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  • Causes of hard crashes on Windows XP and how to debug

    - by Sam Brightman
    I am occasionally seeing hard lockups on XP: totally unresponsive to keyboard/mouse, screen freezes at time of crash, no SSH/VNC possible. Very intermittent, nothing in the logs. I never see a blue screen on any kind of error message. This morning I logged in via VNC, logged out again, 20 minutes later physically sat at PC and it crashed around the time of VNC logout. I tend to suspect video cards in these kind of situations but it's a modern-ish card with modern drivers (one revision back, but this has been happening for 5 revisions or more) and normally would at least see a blue screen I expect. What would you suspect? Where can I look or what can I set up for more information? Bear in mind that this happens about once every 3 or 4 weeks, so extensive logging or intrusive monitoring isn't really an option.

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  • lighttpd server-status

    - by krys
    I have enabled lighttpd mod_status as /server-status. When I go to the URL, I get the status page. I am interested in monitoring connections -- most specifically KeepAlive connections to make sure KeepAlive is working correctly. The problem is I only see the full connection info for the /server-status request itself. All other requests do not have the URI or hist columns filled in: X.X.X.X 0/0 0/4673 handle-req 0 test.mydomain.com /server-status (/server-status) This makes it difficult to know which URL was last handled by a particular connection. Is there something special that I need to do to show this information(URI) in /server-status?

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  • Multi-word dma 2

    - by Streki
    Hi, after installation of XP MODE I have in device manager in IDE ATA/ATAPI controler on my SSD disk Multi-word dma 2 mode/same mode like XP mode BIOS/. I using AHCI mode in bios and w7. Its any choice to get back Ultra DMA 6 mode? Thanks for help.

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  • Copying Windows 7 system onto Mac Pro partition?

    - by BEATFROMBRAIN
    Instead of installing a new Windows 7 system onto a mac pro partition, is it possible to copy over my complete Windows 7 system directly onto the partition, and get it to run? I just bought the mac pro, and it's running OSX 10.6... Copied from a comment: I wish to make a windows partition on the mac pro startup disk, but instead of installing windows, was wondering if I can copy over from my pc laptop byte for byte my windows system into said partition, and successfully run it

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  • drive not showing in Windows setup

    - by Binu V
    Hi, I accidentally formatted my OEM drive of M DELL Inspiron. After that I could not install Windows 7 on my laptop. Because the partitions of my hard disk are not showing to select an install drive. I downloaded the RAID driver from the Dell Support website for my laptop, but the driver is showing and I loaded the driver from a pen drive. But it's still not showing the drives.

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  • SQL Server Log File Size Management

    - by Rob
    I have all my databases in full recovery and have the log backups happening every 15 minutes so my log files are usually pretty small. question is if there is a nightly operation that causes lots of transactions to happen and causes my log files to grow, should i shrink them back down afterward? Does having a gigantic log file negatively affect the database performance? Disk space isn't an issue at this time.

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  • Unable to use TweetDeck on Windows due to "Ooops, TweetDeck can't find your data" and "Sorry, Adobe

    - by Matt
    I'm running Adobe AIR 1.5.2 (latest) on Windows 7 (64-bit RTM) and downloaded TweetDeck 0.31.1 (latest). When I run TweetDeck I get the following errors: Ooops, TweetDeck can't find your data and Sorry, Adobe AIR has a problem running on this computer Other AIR applications install and run fine. I've uninstalled both TweetDeck and AIR and reinstalled. Following the uninstalls I've also removed all on-disk references to both TweetDeck and AIR, but no luck. UPDATE: Using Process Monitor I did a trace of Tweetdeck from the moment it launched until the first error occurred. I saw the following information in the output of the trace: 1 5:22:18.6522338 PM TweetDeck.exe 5580 CreateFile D:\ProgramData\Microsoft\Windows\Start Menu\Programs\rs\??\d:\Use\myusername\AppData\Roaming\Adobe\AIR\ELS\TweetDeckFast.F9107117265DB7542C1A806C8DB837742CE14C21.1\PrivateEncryptedDatak NAME INVALID Desired Access: Generic Write, Read Attributes, Disposition: OverwriteIf, Options: Synchronous IO Non-Alert, Non-Directory File, Attributes: N, ShareMode: Read, Write, AllocationSize: 0 In this trace output, Tweetdeck.exe is trying to create the file D:\ProgramData\Microsoft\Windows\Start Menu\Programs\rs\??\d:\Use\myusername\AppData\Roaming\Adobe\AIR\ELS\TweetDeckFast.F9107117265DB7542C1A806C8DB837742CE14C21.1\PrivateEncryptedDatak but the path specified is invalid. When looking at the path you can see that it is indeed an invalid path. First, there’s the “??” portion which doesn’t exist in the file system since the “?” is an invalid character in Windows/NTFS file systems. Additionally, looking at this path, it actually seems to be composed of two parts (is the "??" a delimiter?): Part 1: D:\ProgramData\Microsoft\Windows\Start Menu\Programs\rs\?? Part 2: d:\Use\myusername\AppData\Roaming\Adobe\AIR\ELS \TweetDeckFast.F9107117265DB7542C1A806C8DB837742CE14C21.1\PrivateEncryptedDatak (the problem here is that d:\Use... doesn’t even exist. What seems to be happening here is that Tweetdeck is looking for the user credentials (the “PrivateEncryptedDatak” file) but it’s looking in the wrong place, can’t find the file, and hence the error that Tweetdeck is giving (shown in the screenshot). I'm trying to determine how TweetDeck is getting this path. I searched the contents of all files on my hard disk hoping to find some TweetDeck or Adobe AIR configuration file containing this incorrect path, but I was unable to find anything. UPDATE: See Carl's comment regarding directory junctions and symbolic links under my accepted answer. This ended up being the problem. Edit by Gnoupi: People, the answer section is there to provide an actual ANSWER, not to say you have the same issue. It doesn't help anyone that you have the same problem. Eventually, if you think this is really worth mentioning, put it as a comment under the question. But simply, if what you want to add is not an answer to the question, then don't post it as an answer. This is not a forum, I recommend new users to read the FAQ: http://superuser.com/faq

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  • Windows 8 Installation doesn't detect my SATA Maxtor 6V250F0 HDD

    - by dosaki
    I've been using Ubuntu on a desktop computer I have in my house and I'd like to try to install Windows 8 and replace the Ubuntu system. In the installation wizard of Windows 8 I get stuck in the point where I have to specify the HDD to install the OS to. The problem is that I cannot see any hard disk drive to select. I believe this may be related to drivers but I don't know where to get them. Can anyone help me with this?

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  • How to: mirror a staging server from a production server

    - by Zombies
    We want to mirror our current production app server (Oracle Application Server) onto our staging server. As it stands right now, various things are out of sync, and what may work in testing/QA can easily fail in production because of settings/patch/etc inconsistencies. I was thinking what would be best is to clone the entire disk daily and push it onto the staging server... Would this be the best method...? (note: these are all windows servers)

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  • 7-Zip on multi-core computers

    - by Peter Mortensen
    Does 7-Zip take advantage of multiprocessor or multi-core systems? For example, would there be a close to 16 times speed-up on a 16 core system assuming no disk or memory bottlenecks? Or is it is limited to 2 threads (2 times speed-up on systems with more than one CPU or core)?

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  • Windows 7: Cannot format drive

    - by aximili
    I was using windows XP, and I just installed Windows 7 on another partition. Now I want to format the partition containing Windows XP, but it says "Windows was unable to complete the format". Under disk management, Format is disabled. Screenshot: http://home.exetel.com.au/aximili/tmp/format-disabled.jpg How can I format this partition (D:) and merge it with the current one (C:)? Thanks in advance.

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  • Match Hard Dusk Partition Table?

    - by MA1
    Hi All What is the efficient way to match the two different hard disk partition tables? I have save the partition tables using dd command in linux. The partition tables are from Windows system. Regards,

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  • SNMP - Value of CPU processor load not reflecting reality

    - by Ovesh
    Trying to plot CPU load on my server, with the following hardware: ProLiant DL360p Gen8 (same behavior on ProLiant DL360 G7). The machine is running VMWare ESXi5.1 To create a CPU spike I run dd if=/dev/zero of=/dev/null, and I know the CPU is overloaded, because I can see a correlating spike in the graphs displayed on vCenter. However, running this snmpwalk: snmpwalk -v 1 -c ******** 192.168.MY_IP 1.3.6.1.2.1.25.3.3.1.2 Shows the following results: iso.3.6.1.2.1.25.3.3.1.2.1 = INTEGER: 3 iso.3.6.1.2.1.25.3.3.1.2.2 = INTEGER: 2 iso.3.6.1.2.1.25.3.3.1.2.3 = INTEGER: 2 iso.3.6.1.2.1.25.3.3.1.2.4 = INTEGER: 3 Am I not looking into the right MIB? Should I be multiplying these by a constant? By the way, using HP Agentless Monitoring I was able to get some cpu stats, but not what I'm looking for, at least nothing I could find wading through these MIBs.

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  • SQL Server 2005, Huge LDF file.

    - by Scott Jackson
    Hi, I have a database running on SQL Server 2005. The database is 20Gb and the LDF file is 35Gb ! I'm now running low on disk space and want to shrink the log file. How can I do this and how can I stop this happening again ? Many thanks Scott

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  • Error ORA-01034: Oracle not available

    - by Mark Hardcastle
    I have an old Novell server which runs DocsOpen. I know very little about this system, basically we had a disk fault which halted the system. The server was rebooted and came up, I had to manually mount the DATA volume and then reboot again. All seems to be working but nobody can get in to DocsOpen, getting the error ORA-01034: Oracle not available.

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  • Copying Windows 7 system onto Mac Pro partition?

    - by BEATFROMBRAIN
    Instead of installing a new Windows 7 system onto a mac pro partition, is it possible to copy over my complete Windows 7 system directly onto the partition, and get it to run? I just bought the mac pro, and it's running OSX 10.6... Copied from a comment: I wish to make a windows partition on the mac pro startup disk, but instead of installing windows, was wondering if I can copy over from my pc laptop byte for byte my windows system into said partition, and successfully run it

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  • my 4 month old 500 GB SATA HDD making noise

    - by Jitendra vyas
    my 4 month old 500 GB SATA HDD making noise, somrtime and pc hangs when it make noise when noise is over then desktop work fine. it's not happens daily but it happens. IS something wrong with HDD, or Data, power cable, or my Cabinet's power supply. should i run scandisk, defragmentation to whole disk.

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  • Xubuntu 9.10 LiveCD on USB fails with error can't open /dev/sr0: no medium found

    - by EricJLN
    Using Ubuntu's USB Startup Disk Creator (usb-creator-gtk), I created a LiveUSB from the Xubuntu 9.10 LiveCD. When booting, it stalls up with the Xubuntu mouse splash screen displayed. In attempting to troubleshoot, I used Ctrl-Alt-F1 to check out the first virtual terminal. On that screen, I see over and over again the lines: stdin: I/O error stdin: error 0 /init: line 1: can't open /dev/sr0: No medium found

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