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software raid 5 degraded

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Hikaru-71

software raid 5 degraded

Newbie

Joined: 2010/12/9

From

Posts: 4

Hi, i has got following question:

There is fresh installation of CentOS 6.2 with software raid 5 configured with anaconda, and it is degraded from the beginning (although it has spare device)

/dev/md1:
        Version : 1.1
  Creation Time : Wed Jun 20 09:59:33 2012
     Raid Level : raid5
     Array Size : 975744000 (930.54 GiB 999.16 GB)
  Used Dev Size : 487872000 (465.27 GiB 499.58 GB)
   Raid Devices : 3
  Total Devices : 4
    Persistence : Superblock is persistent

  Intent Bitmap : Internal

    Update Time : Wed Jun 20 14:40:27 2012
          State : active, degraded 
 Active Devices : 2
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 2

         Layout : left-symmetric
     Chunk Size : 512K

           Name : mail:1  (local to host mail)
           UUID : 4df78011:4219ff72:edb6c4f9:a18ad234
         Events : 1605

    Number   Major   Minor   RaidDevice State
       0       8        2        0      active sync   /dev/sda2
       1       8       18        1      active sync   /dev/sdb2
       4       8       34        2      spare rebuilding   /dev/sdc2

       3       8       50        -      spare   /dev/sdd2

/proc/mdstat doesn't show that raid is rebuilding.

Seems to me there is something wrong, but i don't know what should be done in this situation. All disks are working.

Posted on: 2012/6/20 10:51

WhatsHisName

Re: software raid 5 degraded

Professional Board Member

Joined: 2005/12/19

From /earth/usa/nj

Posts: 1483

Quote:

There is fresh installation of CentOS 6.2 with software raid 5 configured with anaconda, and it is degraded from the beginning (although it has spare device)
...
Seems to me there is something wrong, but i don't know what should be done in this situation. All disks are working.

No, completely normal.

The parity information does not exist when the raid is created and must be calculated de novo for the entire raid.

Just let it finish rebuilding before you reboot. To monitor:

# cat /proc/mdstat

_________________
Useful links: Newbie Info; Manuals; Wiki; EL Repo

Posted on: 2012/6/20 21:56

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