Failed To Run Array Dev Md0 Input Output Error
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Raid 5
AskUbuntu Official Documentation User Documentation Social Media Facebook Twitter Useful Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Specialised Support Ubuntu Servers, Cloud and Juju Server Platforms [all variants] [SOLVED] My degraded raid 5 array will not start Having an Issue With Posting ? Do you want to help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 5 of 5 Thread: [SOLVED] My degraded raid 5 array will not start Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode July 9th, 2008 #1 siDDis View Profile View Forum Posts Private Message Just Give Me the Beans! Join Date Feb 2005 Beans 56 [SOLVED] My degraded raid 5 array will not start Yesterday I found a dead disk in my array, today I removed it. However when I booted up my computer the degraided raid didn't mount itself. First I tried to check its status Code: olav@olav-linux:~$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : inactive sdg1[0](S) sdf1[8](S) sda1[7](S) sdb1[6](S) sde1[5](S) sdd1[4](S) sdj1[3](S) sdi1[2](S) sdh1[1](S) 4395455424 blocks unused devices:
Wiki Search Tutorials/Articles Search HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Linux Forums > Linux - Server [SOLVED] mdadm error replacing a failed disk User Name Remember Me? Password Linux - Server This forum is for the discussion of Linux Software used in a server related context. Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today! Note https://ubuntuforums.org/showthread.php?t=854528 that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to http://www.linuxquestions.org/questions/linux-server-73/mdadm-error-replacing-a-failed-disk-909577/ Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 10-22-2011, 01:42 PM #1 Saline2 LQ Newbie Registered: Oct 2011 Posts: 5 Rep: mdadm error replacing a failed disk Hi Helpful Ubuntu Folks, I have a four disk mdadm RAID5 on which one of the disk failed. The disk just completely died and was not visible by the OS. I powered down, took the disk out, restarted and left the array unstarted. I then bought a new disk and I'm now trying to add to the array and get the array back on its feet. Here is what the "detail" command tells me
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads http://serverfault.com/questions/324155/mdadm-and-raid-5-recovery with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a http://www.linuxforums.org/forum/servers/77867-eeek-cant-assemble-degraded-dirty-raid6-array.html question Anybody can answer The best answers are voted up and rise to the top mdadm and RAID-5 recovery up vote 0 down vote favorite I am encountering some problems with my RAID-5 array, using mdadm and Debian. First of all, I failed to lost a drive (completely, it is not even recognized by the BIOS), then I replaced it with a new one; rebuilding has started but has been interrupted by a read error on the second disk (and this one has been removed): raid5:md0: read error not correctable (sector 1398118536 on sdd) I suppose that this one will die in the next few days, but I want to re-add it to work with a degraded array to perform some backups (only few sectors are broken and failed to run I hope to save a maximum of data before it fails). Here are my disks, in the RAID order: sdc - OK sdd - (the one with read errors, removed from array while rebuilding) sde - (the one that died, replaced by a spare, but obviously interrupted while rebuilding => I'm not convinced about its data integrity) sdf - OK The fact is that I can't re-add sdd to the array, using this command: # mdadm --assemble /dev/md0 /dev/sdc1 /dev/sdd1 /dev/sdf1 --force --run mdadm: failed to RUN_ARRAY /dev/md0: Input/output error mdadm: Not enough devices to start the array. # mdadm -D /dev/md0 /dev/md0: Version : 0.90 Creation Time : Tue Aug 24 14:20:39 2010 Raid Level : raid5 Used Dev Size : 1465039488 (1397.17 GiB 1500.20 GB) Raid Devices : 4 Total Devices : 3 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sun Oct 23 01:57:22 2011 State : active, FAILED, Not Started Active Devices : 2 Working Devices : 3 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 128K UUID : 01017848:84926c43:1751c931:a76e1cde (local to host tryphon) Events : 0.131544 Number Major Minor RaidDevice State 0 8 33 0 active sync /dev/sdc1 1 0 0 1 removed 2 0 0 2 removed 3 8 81 3 active sync /dev/sdf1 4 8 49 - spare /dev/sdd1 As you can see, sdd is recognized as a spare instead of being in sync as RAID device #1. And I have no id
Today's Posts Advanced Search Find the answer to your Linux question: Entire Site Articles Downloads Forums Linux Hosting Forum GNU Linux Zone Servers Eeek! Can't assemble degraded/dirty RAID6 array! If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. ** If you are logged in, most ads will not be displayed. ** Linuxforums now supports the Tapatalk app for your mobile device. Results 1 to 5 of 5 Thread: Eeek! Can't assemble degraded/dirty RAID6 array! Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Enjoy an ad free experience by logging in. Not a member yet? Register. 11-28-2006 #1 cwilkins View Profile View Forum Posts Private Message View Articles Just Joined! Join Date Nov 2006 Posts 4 Eeek! Can't assemble degraded/dirty RAID6 array! Ok, I'm a Linux software raid veteran and I have the scars to prove it (google for mddump if you're bored), but that's not doing me much good now. I'm at the end of my rope... er... SATA cable. Help? Please?? The subject platform is a PC running FC5 (Fedora Core 5, patched latest) with eight 400gb SATA drives (/dev/sd[b-i]1) assembled into a RAID6 md0 device. Originally built with mdadm. No LVM or other exotics. /dev/md0 is a /data filesystem, nothing there needed at boot time. It's been humming along nicely for months. Then... This morning I found that /dev/sdb1 had been kicked out of the array and there was the requisite screaming in /var/log/messages about failed read/writes, SMART errors, highly miffed SATA controllers, etc., all associated with /dev/sdb1. (It appears to have been a temporary failure -- badblocks found no problems.) Tried shutting the system down cleanly, which didn't seem to be working, so finally crossed my fingers and hit the reset button. No surprise, it booted back up refusing to assemble the array. More specfically: Code: Nov 27 19:03:52 ornery kernel: md: bind