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  • CentOS default installation gave 60% disk space to tmpfs partition

    - by garconcn
    I installed a CentOS server which will be used for xen hypervisor. The server has two Intel(R) Xeon(R) CPU E5620 and 148G memory. The OS was installed on a 120G SSD drive. After the installation, I found that the tmpfs partition occupied about 60% of the drive. Even though I don't need much space for the OS, will there be any problem with 71G tmp partition? Thanks for any comment. [root@cloud ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 55G 1.1G 51G 3% / /dev/sda1 99M 13M 82M 14% /boot tmpfs 71G 0 71G 0% /dev/shm

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  • linux: mount old ATA disk to USB adapter

    - by 130490868091234
    I am trying to recover data from an old Linux that was installed in a computer on an ATA hard drive. I found a ScanLogic Corp. SL11R-IDE IDE Bridge (04ce:0002), an ATA adapter to USB 1.0 like the one in the picture: and after switching it on, I plugged it into a laptop with Ubuntu 12.04. I am used to the drives being automatically mounted, but this one doesn't show up in /media. After doing a dmesg, all I got is this: [215298.671924] usb 2-1.1: new full-speed USB device number 5 using ehci_hcd [215298.767330] scsi19 : usb-storage 2-1.1:1.0 [215299.841701] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd [215300.017258] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd [215300.197050] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd [215300.372730] usb 2-1.1: reset full-speed USB device number 5 using ehci_hcd I tried plugging in the adapter to the three different USB ports in my laptop (one of them USB 3.0), but got no luck with any of them. I get different devices under, for example: /dev/bus/usb/003/002 or /dev/bus/usb/002/004, but I don't get any /dev/sdbN links. The output blkid -o list -c /dev/null is just the laptop's partitions. I have tried taking out the jumper, putting it as master and as CS Enabled, but didn't change the result. Any ideas?

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  • Disable disk caches in AWS EBS for PostgreSQL?

    - by Alexandr Kurilin
    It's my understanding that, without correctly disabling OS-level and drive-level caching, there is a chance that in case of system failure the Write-Ahead Log might not be saved correctly and in fact might get corrupted, possibly preventing data recovery. I've already made sure that wal_sync_method=fdatasync however I was unable to make any configuration changes with hdparm since I get the following: $ sudo htparm -I /dev/xvdf /dev/xvdf: HDIO_DRIVE_CMD(identify) failed: Invalid argument Looks like that option is not available in the kind of setup you get in EC2. Am I missing anything here? Are there any other obvious caches I have to disable to ensure the WAL's safety?

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  • Which events specifically cause Windows 2008 to mark a SAN volume offline?

    - by Jeremy
    I am searching for specific criteria/events that will cause Windows 2008 to mark a SAN volume as offline in disk management, even though it is connected to that SAN volume via FC or iSCSI. Microsoft states that "A dynamic disk may become Offline if it is corrupted or intermittently unavailable. A dynamic disk may also become Offline if you attempt to import a foreign (dynamic) disk and the import fails. An error icon appears on the Offline disk. Only dynamic disks display the Missing or Offline status." I am specifically wondering if, on the SAN, changing the path to the disk (such as the disk being presented to the host via a different iSCSI target IQN or a different LUN #) would cause a volume to be offlined in disk management. Thanks! Edit: I have already found two reasons why a disk might be set offline, disk signature collisions and the SAN disk policy. Bounty would be awarded to someone who can find further documented reasons related to changes in the volume's path. Disk signature collisions: http://blogs.technet.com/b/markrussinovich/archive/2011/11/08/3463572.aspx SAN disk policy: http://jeffwouters.nl/index.php/2011/06/disk-offline-with-error-the-disk-is-offline-because-of-a-policy-set-by-an-administrator/

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  • How to recover data from software RAID 5 disk partition

    - by Ali n
    I have CentOS 5.8 on my computer, with 5x 1TB hard drives. I used software RAID. (RAID 1 as a boot partition md0, RAID 0 as a root partition md1 and RAID 5 as /home partition md3). Unfortunately one of these hard drives failed lately and I want to replace it with a new one. I want to know that is it possible to change this hard drive without data loss? The important partition is RAID 5 so in theory if one of hard drives failed I should be able to recover its data without any problem. But in practice how can I do that?

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  • hp DL380 G4 won't boot with disk plugged into front USB

    - by Kev
    We outgrew a few older external USB backup drives, and purchased WD My Passport 1 TB USB 3.0 drives to replace them. When they are plugged into the front of our G4, it will blink forever after the BIOS (which is current, BTW) and never boot, even though the USB disks are not "bootable" per se. Our old drives did not exhibit this behaviour (so I don't think it's this type of issue that I've read about other servers.) The old drives were USB 2.0, but this shouldn't make a difference, AFAICT--the specs say all of the G4's USB ports are the same, 2.0, anyway, so I'm not sure how one port would handle a USB 3.0 device better than another. If we plug the new drives in one of the back slots, it boots fine. What's the cause? My concern is that the front USB port, and possibly the motherboard, might be starting to die. (We are experiencing other strange issues with them, or were initially, like intermittent file permissions errors despite wide-open ACL on these local drives, but some serverfault users have me convinced they may be coincidental software/security related issues.)

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  • Computer sponteously reboots when doing heavy file copy to/from disk

    - by Mark Hosang
    I've been fighting with this problem for the last 3 weeks where my machine will just instantly reboot. No BSOD, and when i checked the event log all that was reported was the generic "Kernal-power" error with the detailed information pointing to a hard crash. This is a machine that was working for 18 months before these crashes started happening. When they started happening is after I added 3 HDs in a RAID-5, upped the memory to 12gb, moved to a new house, added a SSD and added about 5 case fans. I have thus eliminated the RAID, and determined that the SSD was not the cause (because it was still crashing even though the ssd wasn't connected). I've run memtest several times over night with no memory problems showing up. I've run IntelBurnTest to max out the cpu to see if it was a heat issue and at full tilt after 20 min it was only at 85C and the machine didn't crash. I also took a look at the voltages during this test, with a screenshot at the bottom of this post I've ruled out a software issue by reinstalling windows 7 ultimate x64 a total of 5 times, but even during that the install it crashes. Happens sometime during file copying at the beginning, or during uncompressing files, or sometimes during running windows update. The only discernible pattern i can see is that it seems to crash when hard disks might be spinning up or when they are accessed heavily from large file transfers. My current guess is that it is probably an issue with the MB, PSU or the power coming through the outlet. Any suggestions of what i could try to troubleshoot or what may be wrong? Specs PSU: Seasonic M12 700w Mem: 12gb CPU: i7-920 with stock heatsink MB: Asus P6T HDs: 3 green WD and 1 Corsair force 3 120b with 1.3.3 firmware Running full tilt voltages Idling Voltages

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  • Disk is apparently in use by the system

    - by Shaun
    I've just fitted two disks to my home server. I'm trying to format and then raid them but I'm getting a problem that hours of Googling hasn't resolved this. The error that I'm getting is: # mkfs.ext3 /dev/sdb1 mke2fs 1.39 (29-May-2006) /dev/sdb1 is apparently in use by the system; will not make a filesystem here! # df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 4.0G 1.9G 2.0G 49% / none 380M 0 380M 0% /dev/shm /opt/xensource/packages/iso/XenCenter.iso 51M 51M 0 100% /var/xen/xc-install # mount -t ext3 /dev/sdb1 /mnt/b mount: /dev/sdb1 already mounted or /mnt/b busy I'm new to this and it's got me beat. I wouldn't ask if I hadn't done my research first. Thanks.

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  • Storage disk format to use to be utilised by all OS

    - by ClothSword
    Aiming to have a large internal HDD to store files, and several OSes on separate disks. They all need to read and write to one storage drive. Ubuntu (13.04+) Mac OSX (10.8+) Windows (7+) What format should the drive be? Would like to avoid buying third party software, here's what I have discerned so far: NTFS - Can't be written to by Mac without buying third party software? ext3 - Windows can't read, third party software in development. Mac has OSXFUSE HFS+ - Buy third party and/or faff around to get working on windows exFAT - Cross platform, but breaks MS patents?

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  • Convert partition to Virtual Disk image

    - by Rick
    I have a 250 GB HD with a XP partition. I partitioned the XP Box to 112 GB, since the max Virtual PC can load is 127 GB. I have a new motherboard and can't load into the partition, so I am using Windows 7. I have tried using WinImage to create the image but it creates an image of the whole disc (250 GB) and will not load on Virtual PC cause of the size limit. What would be best to convert to VHD correctly?

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  • Windows 7 Home Premium x64 Disk Partitioning

    - by Tamir
    Hi all, I'm having new Dell studio 1749 laptop with one partition (C). there is another backup partition - hidden. How can I create new partition for all the files and the other stuff to be seperated from the C partition? I'm looking for a clean and simple way to do it, thanks!

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  • Reimage several of the same model PC by copying the hard disk

    - by Tim Lehner
    I have several of the same machine (Dell Precision T3500) that originally came with Windows 7 Pro (there is a Windows 7 Pro OA product key sticker on top of each one). These were initially downgraded to XP by a former IT colleague, but are now back in the pool of unused machines. I am looking to format and install Windows 7 Pro on one of them using the latest official Win7 installer ISO with SP1 and then clone the hard drive to the other machines. The questions then, are: Does this even make sense, or is there a better way to do this considering I'm only doing it to 6 machines? Does this jive with MS licensing (we are the original purchaser of the machines, and thus, presumably, the license holder...but I'm no expert)? Is it possible to apply the individual 25-char product keys to the cloned machines after cloning? How far can I go in the config process (installing corporate standard apps and such) before I have to clone to the other machines considering the licensing/key questions?

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  • How do I log file system read/writes by filename in Linux?

    - by Casey
    I'm looking for a simple method that will log file system operations. It should display the name of the file being accessed or modified. I'm familiar with powertop, and it appears this works to an extent, in so much that it show the user files that were written to. Is there any other utilities that support this feature. Some of my findings: powertop: best for write access logging, but more focused on CPU activity iotop: shows real time disk access by process, but not file name lsof: shows the open files per process, but not real time file access iostat: shows the real time I/O performance of disk/arrays but does not indicate file or process

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  • Easier way to create floppy disk images?

    - by Bryan
    I'm using Vyatta routers with KVM and want to attach a floppy drive with a config file for Vyatta when I boot the image. I'll be doing this over and over again, and as such am looking for an automated way of creating the floppy images. Right now, I'm doing the following: Create floppy image with qemu-img create Format floppy image with mkdosfs Mount floppy image with mount -t fat /tmp/floppy.img /media/floppy Populate floppy image with cp -r /tmp/configs/ /media/floppy/ Unmount floppy image with umount /media/floppy Save floppy image with mv /tmp/floppy.img ~/floppies/ Any chance there's an easier way to do this?! Perhaps a shortcut application that I can give a directory to and it will do all this for me w/out having to mount the image?

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  • SQL Server database on an external hard disk drive

    - by Achilles
    Due to some security problems, My boss has asked me to store all sensitive data in external/removable storages like USB stick or external HDD and this specially includes the MDF/NDF/LDF files of SQL Server 2008 we're running. I've been reading for these last three days with no luck to find a solution. Is there any solution at all? Has ever anybody done such thing?

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  • Optimal Disk Setup for OLTP SQL Server

    - by Chris
    We have a high transaction (lots of reads and writes) database server (running SQL 2005) that is currently set up with a RAID 1 OS partition (C:) and a RAID 5 data/log/tempdb partition (D:). The C: has 2 drives and the D: has 4 drives. The server has around 300 databases ranging from 10MB to 2GB in size. I have been reading up on best practices for partioning the disks, but would like some opinions on our setup since we are so limited in the number of disks. It seems like RAID 10 is popular, but I dont think we could use it with only 6 total disks to work with. Thanks. Update I went with 3 RAID 1 Partitions (2 disks each) Partition 1: OS, TempDB, Backups Partition 2: Logs Partition 3: Data

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  • Suppress "running out of disk space" Message (per drive) on Windows Server 2003

    - by Shoeless
    We have a database server with separate drives for OS, various data files and the transaction log. Our transaction log spills over onto other volumes as well- this is expected behavior. The problem is that we are constantly getting popups that our transaction log drive is out of space (and that I can free space by deleting old or unnecessary files). Is there some way to prevent this message from popping up for this particular drive?

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  • Solaris 10 5/09 can't find SATA disk

    - by anon
    We need to run standard Solaris 10 on a few development servers (Dell 530s) because we can't get a commercial application running on OpenSolaris (we're still trying). However, we are finding that sometimes when Solaris 10 goes to do the install, after setup screens, it can't find the SATA drive. We tried the BIOS setting described here: BigAdmin On some Dells 530s, Solaris GA installs fine, but on others it doesn't. OpenSolaris always installs. Is there some way we can determine (eg. installing OpenSolaris and examining the SATA driver used) what OpenSolaris detected and use some option or driver from it to get Solaris 10 installed on our development Dell servers?

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  • What the best way to recover from when your RAID H/W incorrectly thinks a disk is missing

    - by Software Monkey
    I have a Windows 7 system with an MSI motherboard (running the latest AMD BIOS) and two of my four disks (not the system boot disk) configured via the Mobo as RAID-1. After a normal system restart today, the RAID BIOS reports that one of the two drives has been disconnected or has failed. It's not really failed; via recovery tools I can verify that if I take the BIOS out of RAID mode. But I can find no way to re-add the second hard disk to the array and rebuild via the BIOS - the only option seems be to delete the array and recreate it, but I've done that once before and it blows away the disk. It's done this once before, however on a subsequent reboot after double-checking the drive cabling (but not changing anything) and it boot up fine. So I think the mobo RAID is a little bit flaky. At this point I would like to remove the RAID drivers, change to AHCI mode and switch over to using a Windows 7 dynamic mirror disk. But the RAID drivers seem somehow deeply bound into the Windows startup - I can't find anything like the good ol' safe-mode in Windows 7. If I boot from the Win 7 install disk in ACHI mode I can use recovery tools to log in to the Windows 7 installation, so the boot drive it seems fine with ACHI mode. Additionally, I can see all my other disks, run chkdsk on them and they seem to be fine. If I try to boot from the HDD in AHCI mode, it just reboots part way through, presumably because the RAID drivers load and conflict with the BIOS being set to AHCI. So: How do I strip the RAID drivers from my Win 7 installation? If I delete the RAID logical disk, will it really delete partitioning information, or is that just a poorly worded message when it says the data on the disk will be deleted? If I disconnect the 2 disks in a RAID array, then delete the logical disk array, and then reconnect and reboot still in RAID mode, will the disks simply revert to RAID single-disks like my other 2 and then maybe I can leave windows with RAID drivers by operate the disks as singles with 2 of them in a Windows dynamic disk mirrored setup? Does Windows 7 have anything like the Windows XP Repair Install, where it will reinstall the O/S binaries from CD, but leave apps and setup alone. I am really hoping I don't have to do a complete reinstall of Windows 7 - the last one, when I upgraded from XP, took me two days to get everything set up and installed.

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  • Disk usage on IIS, PHP5, performance problems.

    - by Jacob84
    Hi everybody, I'm quite worried with a performance problem that I'm facing in one of our production servers. I'm working for a hosting company, so you can imagine how heterogeneous the applications runnning here are. All started with a call of a client complaining about the speed loading a Joomla. The setup is IIS6 (Windows 2003) with PHP5 and FAST CGI wich normally works pretty well. I've tested the loading time and indeed, he was right. 7 or 8 seconds to load, when usually this can be accomplished in 2. Seeing this results, I started to check first CPU and RAM. Everithing normal, 2GB of RAM free, 3%-8% of CPU activity. That's what I call a relaxed server ;). Unfortunately, digging a little deeper I've found the 'PhysicalDisk' counters quite high (above 10), specially the read queues. I've used Process Explorer to see wich of those processes has the higher deltas, but everything seemed normal. As the problem is specially related to PHP pages, I've checked specific IIS counters, as Actual connections, Number of CGI requeriments and Number of ISAPI requeriments. CGI -> 3 to 7 ISAPI -> 5 to 9 Connections-> 90 to 120 (wich appears at the top of the graph) More than a solution (I know this is hard to find), I would like to know if you have an specifical methodology to face this kind of problems. Thanks a lot, as always.

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  • backing up ntfs disk using rsync on ubuntu

    - by user70366
    For a long time I was using windows. I have a separate drive I use to keep copies of my media files, photos etc. on, which I periodically backup to an external drive. In Windows I used SyncToy to do this. After my Windows stopped booting, I decided to switch to Linux (Ubuntu 10.10). That seems to be going fine, but now I want to backup my drive to the external drive like before. Mostly the two drives will be already the same with maybe about 10GB of extra files added. So I try to use rsync to synchronise the two drives like this: rsync --dry-run -rvlt --modify-window=1 /media/Antonio1TB/Backup /media/FREECOM\ HDD/Backup The problem is the dry run indicates that every file on the drive will be copied. Not just the files I have recently added. What is the correct command to synch two NTFS drives under Ubuntu so that files that already exist don't get copied again? Thanks.

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