[SATLUG] RAID5 Recovery - Reassembly looking good!!! :+)

David Labens adlabens at swbell.net
Wed Aug 26 23:45:25 CDT 2009


root at RCH-SERVER:/# mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdc1 /dev/sde1

mdadm: forcing event count in /dev/sdc1(3) from 2978 upto 2986
mdadm: clearing FAULTY flag for device 1 in /dev/md0 for /dev/sdc1
mdadm: /dev/md0 has been started with 3 drives (out of 4).
root at RCH-SERVER:/#

AND ...

root at RCH-SERVER:/# mdadm -D /dev/md0
/dev/md0:
        Version : 01.00
  Creation Time : Sat Jan 10 13:03:52 2009
     Raid Level : raid5
     Array Size : 732587520 (698.65 GiB 750.17 GB)
  Used Dev Size : 488391680 (465.77 GiB 500.11 GB)
   Raid Devices : 4
  Total Devices : 3
Preferred Minor : 0
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Sat Aug  8 20:24:05 2009
          State : active, degraded
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-asymmetric
     Chunk Size : 128K

           Name : 0
           UUID : 13782a18:85c82f51:e999ccd0:c2ca0614
         Events : 2986

    Number   Major   Minor   RaidDevice State
       0       8       65        0      active sync   /dev/sde1
       1       8        1        1      active sync   /dev/sda1
       2       0        0        2      removed
       4       8       33        3      active sync   /dev/sdc1
root at RCH-SERVER:/#

So far, so good!!!

It is /dev/sdb1 that is removed, so ...

the command was specified in the email as being ...
mdadm --add /dev/md0 /dev/sdX 
but shouldn't "X" be "b1" (/dev/sdb1) or should it be just "b" (/dev/sdb)

???

David Labens

San Antonio, TX

--- On Wed, 8/26/09, Samuel Leon <satlug at net153.net> wrote:

From: Samuel Leon <satlug at net153.net>
Subject: Re: [SATLUG] RAID5 Recovery - MDADM Segmentation Error
To: "The San Antonio Linux User's Group Mailing List" <satlug at satlug.org>
Date: Wednesday, August 26, 2009, 11:39 PM

Yea lets see what happens

David Labens wrote:
> Whew!  ;+)))
> 
> So, I can retry to force RAID5 assembly?
> 
> David Labens
> 

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