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  1. #1

    Software RAID status

    Hi,

    Just got a new server. Run /proc/mdstat and here is the result:

    [[email protected] ~]# cat /proc/mdstat
    Personalities : [raid1]
    md1 : active (auto-read-only) raid1 sda2[0]
    4192192 blocks super 1.1 [2/1] [U_]

    md0 : active raid1 sda1[0]
    204736 blocks super 1.0 [2/1] [U_]

    md2 : active raid1 sda3[0]
    229899072 blocks super 1.1 [2/1] [U_]
    bitmap: 2/2 pages [8KB], 65536KB chunk


    Does it mean the RAID 1 array is degraded?

  2. #2
    Join Date
    Aug 2007
    Location
    Belgium
    Posts
    4,183
    That means the array is not in sync.
    Execute these commands:

    mdadm --readwrite /dev/md0
    mdadm --readwrite /dev/md1
    mdadm --readwrite /dev/md2
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  3. #3
    [email protected] [~]# mdadm --readwrite /dev/md0
    mdadm: failed to set writable for /dev/md0: Device or resource busy
    [email protected] [~]# mdadm --readwrite /dev/md1
    [email protected] [~]# mdadm --readwrite /dev/md2
    mdadm: failed to set writable for /dev/md2: Device or resource busy

  4. #4
    Join Date
    May 2007
    Location
    Atlanta
    Posts
    200
    The raid1 array is degraded. Have your data center check to see what disk is dead. Replace the disk and rebuild the array.
    Jon Fatino
    WireSix - Great Network - Great Servers. Great Deals.
    WireSix - Atlanta - Dallas - Phoenix - Clifton - LA

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