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• SLES 11 - ocfs2 - Locking does not appear to work

  - by Autobyte

  Hi I have two SLES 11 servers that are SAN attached to a Clarion CX-340. The SAN partition has been formatted with ocfs2 and I have both machines setup in a cluster and the cluster is running (all appears to be normal). I have a small java application as a locking test and when I run the application on both machines at the same time, I should get the lock on one server and the other should refuse the lock since the first already holds a lock on that file but in this case both servers get a lock on the same file. Basically my cluster.conf looks like this: node: ip_port = 7777 ip_address = 192.168.10.121 number = 1 name = osrsles10node1 cluster = osrsles10 node: ip_port = 7777 ip_address = 192.168.10.122 number = 2 name = osrsles10node2 cluster = osrsles10 cluster: node_count = 2 name = osrsles10 Please ask for any other info - I really need these locks to be exclusive to each server. Thanks.

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• Recover Windows 7 from Linux Ubuntu?

  - by macha

  I have two partitions and have Linux Ubuntu running on one partition and Windows 7 running on the other. Now when I try to boot from Windows 7, I get an error saying the /system32/winload.exe file is corrupted or deleted. Now I have Windows 7 files on my system but do not have the DVD, I have made USB bootable with Windows 7, but when I boot it with the USB stick, a blue screen is coming on with weird errors messages. Now I am trying to restore my Windows instance to a restore point where it can work normally. How can I do that in my situation?

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• How to (hardware) RAID 10 on Ubuntu 10.04 LTS with 4 drives and motherboard with RAID contoller

  - by lollercoaster

  I have 4 500GB hard drives. I set up a RAID 10 in BIOS, much like shown here: http://www.supermicro.com/manuals/other/RAID_SATA_ESB2.pdf Then I followed these instructions: http://www.unrest.ca/Knowledge-Base/configuring-mdadm-raid10-for-ubuntu-910 Basically I cannot get it to work. I go through the instructions when I get to the "partition" section of the install, creating 4 RAID 1's (2 partitions on each drive, one for primary and one for swap space), then combining to make a RAID 10. Unfortunately it still shows 2 partitions, one 500 GB and another being 36GB for some reason. Any ideas? I think best would be if anyone had found good instructions (step by step) for how to do this...I've been googling for hours and haven't found anything...

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• page allocation failure - am I running out of memory?

  - by mfriedman

  Lately I've noticing entries like this one in the kern.log of one of my servers: Feb 16 00:24:05 aramis kernel: swapper: page allocation failure. order:0, mode:0x20 This is what I'd like to know: What exactly does that message mean? Is my server running out of memory? The swap usage is quite low (less than 10%), and so far I haven't noticed any processes being killed because of lack of memory. Additional information: The server is a Xen instance (DomU) running Debian 6.0 It has 512 MB of RAM and a 512 MB swap partition CPU load inside the virtual machine shows an average of 0.25

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• Restore XP on Acer Aspire One netbook

  - by Imran

  I have an Acer Aspire One D250 netbook which came with Windows XP (but no CD) on which I have since installed Xubuntu 9.10. Now I am trying to sell it, but I cannot find a way to recover XP. I have read in a lot of different places that holding Alt+F10 during boot should send me to a recovery menu (which will allow me to restore XP from a "secret partition"), but I have tried many times to no avail. The best I can do is get the BIOS setup screen by holding F2, but there doesn't seem to be any recovery option there. After the initial option to go into the BIOS setup GRUB starts loading and there don't seem to be any more opportunities to enter a system setup screen. Please help!

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• Finder Sidebar Icons - How do I duplicate?

  - by Wilco

  I've noticed that some system directories, when dragged to the Finder's sidebar, utilize special small-scale icons not visible in any other place. Even when looking at one of these folders in a Finder window using the smallest possible icon size, these "special" icons don't appear (so it's not just the small version of the folder's icon). So my question is, where is this information stored? If I wanted to duplicate this behavior for an arbitrary folder, where would I need to look? I like to replace my home directory with a symlink to a location on another partition, but when I do this, I lose this sidebar icon behavior. I would love to get this back if I can.

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• RAID FS detection at boot time

  - by alex

  An excerpt from dmesg: md: Autodetecting RAID arrays. md: Scanned 2 and added 2 devices. md: autorun ... md: considering sdb1 ... md: adding sdb1 ... md: adding sda1 ... md: created md1 md: bind<sda1> md: bind<sdb1> md: running: <sdb1><sda1> raid1: raid set md1 active with 2 out of 2 mirrors md1: detected capacity change from 0 to 1500299198464 md: ... autorun DONE. md1: unknown partition table EXT3-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT2-fs (md1): error: couldn't mount because of unsupported optional features (240) EXT4-fs (md1): mounted filesystem with ordered data mode Is it OK that kernel tries to mount an ext4 raid as ext3, ext2 first? Is there a way to tell it to skip those two steps? Just in case: /dev/md1 / ext4 noatime 0 1 TIA.

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• Grub install fails while installing Ubuntu on RAID

  - by Warren Pena

  I'm trying to install Ubuntu 9.10 using the alternate install CD, but I keep getting stuck. I get through the first few steps of the install process easily enough (telling it what partition to install to, what user ID and password to create, time zone, etc.), but then it suddenly pops up a menu asking me what the next step in the install process is. It has "Install the GRUB boot loader on a hard disk" selected by default. When I select it, it goes to another screen with a progress bar and a label "Installing the 'grub2' package." The progress bar gets to 16%, and then I get returned to the same menu. No matter how many times I try to install grub, the exact same thing happens. I'm trying to install Ubuntu on a two disk RAID-1 array. This is the RAID card I'm using: http://www.siig.com/ViewProduct.aspx?pn=SC-SAER12-S2. Any ideas what may be causing this to happen and how I can fix it? Thanks!

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• External Hard-Drive Randomly Ejects; Stays On

  - by Kaleb F.

  My 250GB I/O Magic USB external hard-drive randomly disconnects / ejects from the computer after between 2-30 minutes of use. When this happens, the blinking activity light on the front of the hdd turns off; however, the disks can still be heard spinning. Unplugging & replugging in the USB does not reconnect the device and the activity light remains unlit. The only way to continue using it is to flip off then on the power switch of the hdd. The hard-drive was formatted with MBR partition table and 2 NTFS volumes. I recently tried switching to GUID with two Mac OS Extended (Journaled), but the problem remains. This error occurs with my new Macbook Pro with Snow Leopard as well as with my DELL E520 with Windows 7 Ultimate.

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• Failover tmpfs mirroring. Am I doing it right?

  - by user45286

  My goal is to have a certain directory to be available as tmpfs. There will be some modifications during server uptime in this dir and those modifications must be synced to non-tmpfs persistent dir on HDD over rsync. After server boot the latest version from non-tmpfs persistent dir must be moved to tmpfs and rsync syncing to be started. I'm afraid that rsync will erase non-tmpfs backup if tmpfs dir will be empty.. I'm doing it in this way right now: create tmpfs partition in /etc/fstab cat /etc/rc.local (pseudocode) delete "tmpfs rsync" cronjob from /var/spool/cron/crontabs if there is any cp -r /path/to/non-tmpfs-backup /path/to/tmpfs/dir append /var/spool/cron/crontabs with "tmpfs rsync" cronjob What do you think?

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• Windows Vista wont recognize SSD drive

  - by Spiros

  I just bought an SSD drive for my Vista (32bit) box (120GB OCZ Agility 3). Unfortunately windows vista won't display it in the my computer window, and generally wont let me work on it. However, the bios recognizes the SSD drive correctly, and when I go on the windows device manager the drive is there as well. I can see the device properties. On the volumes, when I click on populate, I have: Disk: Disk1 Type: Uknown Status: not initialized Partition style: not avaiable Unallocated space: 0MB Reserved space: 0MB Any ideas what could be wrong? Thanks

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• Create NTFS symbolic links from within Linux

  - by rymo

  Is there a Linux utility that can create NTFS symbolic links? That is, a link on an NTFS partition that points to another NTFS folder - one that will work within Windows 7, specifically. I wish to relocate a folder that is normally in-use while Windows is running. This machine can already dual-boot into Ubuntu, so I'd like to leverage that. EDIT: To keep this from potentially turning into "which Windows Live CD is best", I will limit this question to "Is it possible with Linux, yes or no?"

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• Installing Windows XP sp3 into USB 2.0 WD 320Gb Hard Drive

  - by NetKabuki

  I have a HP laptop with support for 3 USB 2.0 ports. I also have a clean 320Gb WD USB 2.0 drive. The HP can boot from USB (Bios options). I used the install disk (XP SP3 bootable) and after a few stutters, was actually able to load up a partition on the 320Gb drive with Windows. I cannot consistently get the system to boot up off the USB drive. I am able to drop Ubuntu on that same WD drive and boot up. I can even get Grub2 on Ubuntu to recognize the Win OS. But booting the Win OS is an impossible task. What can I do differently - if anything?

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• Why Both 8GB USB Flash Drives Have Different Integrities?

  - by Boris_yo

  USB 3.0 SuperTalent Express DUO 8GB recently had its partition corrupted and declared itself "write-protected" and I was told in chat by @sidran32 that this usually means that flash drive gone bad due to writing cycles limit being reached. Having this thumbdrive for over a year being used infrequently, I was in doubt and referred to SuperTalent's support. I was given recovery tool which I executed but it failed first time prompting me to reinsert it. After that, I formatted it with Windows 7 integrated format utility since recovery tool offered to do this as well which was successful. The problem as I have noticed is with integrity of SuperTalent: Compare above to SanDisk's Micro Cruzer 8GB: Am I missing something? Both thumbdrives are of 8GB and have same FAT32 file system.

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• Slow NFS transfer performance of small files

  - by Arie K

  I'm using Openfiler 2.3 on an HP ML370 G5, Smart Array P400, SAS disks combined using RAID 1+0. I set up an NFS share from ext3 partition using Openfiler's web based configuration, and I succeeded to mount the share from another host. Both host are connected using dedicated gigabit link. Simple benchmark using dd: $ dd if=/dev/zero of=outfile bs=1000 count=2000000 2000000+0 records in 2000000+0 records out 2000000000 bytes (2.0 GB) copied, 34.4737 s, 58.0 MB/s I see it can achieve moderate transfer speed (58.0 MB/s). But if I copy a directory containing many small files (.php and .jpg, around 1-4 kB per file) of total size ~300 MB, the cp process ends in about 10 minutes. Is NFS not suitable for small file transfer like above case? Or is there some parameters that must be adjusted?

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• Windows XP boot: black screen with cursor after BIOS screen

  - by Radio

  Here is a weird one, Got computer with Windows XP. It's getting stuck on a black screen with cursor blinking. What did I do: - Boot from installation CD (recovery option - command line): chkdsk C: /R copy D:\i386\ntdetect.com c:\ copy D:\i386\ntldr c:\ fixmbr fixboot Chkdsk showed 0 bad sectors and no problems during scan. dir on C:\ shows all directories and files in place (Windows, Program Files, Documents and Settings). BIOS shows correct boot drive. Still does not boot. Not sure what to think of. Please help. UPDATE: Just performed these steps: Backed up current disk C: (without MBR) using True Image to external hard drive Ran Windows XP clean installation with deleting all partitions and creating new one. Hard drive booted fine into Windows GUI installation!!! Then: Interrupted installation. Booted from True Image recovery CD and restored archive of disk C to an new partition. Same issue with black screen.

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• Unable to copy files previously extracted from archives created on a Mac, even after claiming ownership

  - by Maxim Zaslavsky

  I reinstalled Windows on my computer today, and backed up my music to a USB drive. Now, I'm trying to copy the files onto my fresh Windows partition, but I'm unable to copy files that I obtained within my previous Windows installation from zip archives created on Macs. When I try to copy those previously-extracted files, I get an error saying that I need permission from S-1-5-21-...-1000 (a bizarre long ID). The first thing I tried was to take ownership of the files by setting my new user account as the owner, but that resulted in errors saying that I need permission from myself! Some Googling suggested adding antivirus suggestions, so I excluded the relevant folders from Microsoft Security Essentials, but the issue persists. For what it's worth, it seems that some program (so far I've only installed Chrome, Microsoft Security Essentials, and the latest Windows updates) created an empty folder named 601c8c7f0e0c03f725 at the root of my external USB hard drive. What gives?

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• Linux's best filesystem to work with 10000's of files without overloading the system I/O

  - by mhambra

  Hi all. It is known that certain AMD64 Linuxes are subject of being unresponsive under heavy disk I/O (see Gentoo forums: AMD64 system slow/unresponsive during disk access (Part 2)), unfortunately have such one. I want to put /var/tmp/portage and /usr/portage trees to a separate partition, but what FS to choose for it? Requirements: * for journaling, performance is preffered over safe data read/write operations * optimized to read/write 10000 of small files Candidates: * ext2 without any journaling * BtrFS In Phoronix tests, BtrFS had demonstrated a good random access performance (fat better than XFS thereby it may be less CPU-aggressive). However, unpacking operation seems to be faster with XFS there, but it was tested that unpacking kernel tree to XFS makes my system to react slower for 51% disregard of any renice'd processes and/or schedulers. Why no ReiserFS? Google'd this (q: reiserfs ext2 cpu): 1 Apr 2006 ... Surprisingly, the ReiserFS and the XFS used significantly more CPU to remove file tree (86% and 65%) when other FS used about 15% (Ext3 and ... Is it same now?

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• Boot from VHD with windows7 - bcdedit trouble

  - by Michiel Overeem

  I'm running Windows7 Enterprise, x64 version. I've created a windows7 vhd file with help of the following blog post hanselman blog After that, I've added it to my boot menu with help of another blog post hanselman blog This worked great. After that, i've upgraded my hdd. With help of clonezilla i've copied the old disk to the new disk. Next step was to copy the vhd to another partition. Then i updated the boot menu. However, the step C:\>bcdedit /set {guid} device vhd=[driveletter:]\<directory>\<vhd filename> fails with the message An error has occurred setting the element data. The request is not supported. what is happening?

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• can 'Percona MySQL Data Recovery' be used to recover dropped tables if the datadir filesystem is mounted as /

  - by Tom Geee

  according to Percona: Unmount the filesystem or make it read-only if... You have filesystem corruption OR You have dropped tables in innodb_file_per_table format If I have innodb_file_per_table enabled, and accidently dropped a table, while the datadir is mounted as within the / partition , can data still be recovered? Obviously you can't work with an unmounted root filesystem. Our VPS host has a defaulted filesystem table which we cannot customize. I was wondering in case of any future scenario. edit: would mounting the / filesystem through NFS onto another system as read-only be a workaround? TIA.

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• Adding Windows 7 to grub4dos menu.lst

  - by antonio

  I am trying to create a multiboot USB drive with grub4dos. I started with a working bootable WinPE-like USB drive, based on Windows 7. I modified the drive MBR with grubinst.exe (hd1), copied in its root grldr and the menu menu.lst file: color blue/green yellow/red white/magenta white/magenta timeout 30 default 0 title Win 7 test rootnoverify (hd0, 0) chainloader /bootmgr I get the error: Try (hd0, 0). This partition is ntfs but with unknown boot record Try (hd0, 1) ... ... Cannot find GRLDR. If I hit a key, anyway it boots Windows 7. I would like to drop to the GRUB command shell, but when I hit "c" Grub boots into Windows.

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• How to increase hard drive transfer speed

  - by atif089

  This is my motherboard GA-M61PME-S2 (SATA upto 3.0 Gbps) and This is my Hard Disk Samsung hd502hi Capacity 500 GB Cache 16MB Disks / Heads 1 / 2 Interface SATA 3Gb/s Spindle Speed 5400 RPM Sustained Data Rate OD 100 MB/s Average Seek 8.9 ms Average Latency 5.56 ms Data Transfer Rate 300 MB/sec Weight 470 grams Power: Idle / Seek / R-W / Spin-up 3.9W / 4.8W / 5.1W / ~24W Acoustics (sound power) 2.2 / 2.7 Bel (idle / quiet seek / performance seek) When I copy things from one partition to another they transfer at a maximum of 30 MBps. However the drive supports upto 300 MBps right ? How do I increase the transfer speeds? P.S - Using Windows XP, All partitions are NTFS.

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• Cannot boot into Lucid Lynx

  - by xenon

  I upgraded from Karmic Koala to Lucid Lynx beta, was working fine for a while (was even rebooting). But, after some time, it is not booting and i cant find a solution. I have tried installing the grub again, doesn't help. Well, the problem is all my settings, bookmarks and passwords are blocked in that partition. I cant find where the Chrome stores bookmarks in Ubuntu. Can you help me either getting my system rebooted or getting the bookmarks ? Thanks. p.s. I am currently on liveusb.

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• Cannot format SD memory card

  - by cool

  Hello everyone I have a SD memory card which is of local manufacturer it allows to read & copy from it but not write as it is now write-protected so i want to format that card but could not. To format this card I have tried 1) DD command 2) mkfs -f vfat command 3) creating registry entry under storage device policy in window with write value 0 4) disk part command in window to clear attributes in which it show all attributes are clear ie no write protection 5) I format card in windows through control panel - administrative tools- computer management - disk management, then it show as formatted but when I tried to create new partition it give CYCLIC REDUNDANCY CHECK error 6) I downloaded a format utility from transcend site and formatted first it shows write protected again doing format it formats and tells to remove and reinsert after reinsertion it shows the previous data as it is

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• MySQL installation question.

  - by srtriage

  I am far from a DBA and have a question. Recently I installed MySQL. On my machine C:\ is a 50GB partition of two mirrored 10k SAS drives. The remaining space on those drives is allocated to D:. I also have a SSD mounted as E:. When I installed MySQL, I installed it to E:\ assuming that that is where the database information would be held since I had installed it there. I am now seeing C:\ProgramData\MySQL\MySQL Server 5.1\data\peq, peq being the name of my main database. Is my database being stored in C:\ and if so, how do I fix it to store the DB on the SSD?

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