RAID5 - /md0 does not appear to be active

  • I have a three drive Raid5 array and one of the drives is returning back that it is removed. I can see the drive in the OMV front end but I can't seem to join it back to the array. Here are some details, Any help is appreciated.





    Code
    root@zed:~# cat /proc/mdstat
    Personalities : [raid6] [raid5] [raid4]
    md0 : active raid5 sdf[0] sdg[1]
          5860530176 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
  • Things have gotten very worst. Now I can't event access the array at all.


    mdadm -E /dev/sd[fgh] shows that the drives are there



    but when I do a cat /proc/mdstat it says inactive
    Personalities :
    md0 : inactive sdf[0](S) sdh[3](S) sdg[1](S)
    8790796668 blocks super 1.2


    unused devices: <none>




    mdadm -D /dev/md0 reports that the device is not active.


    root@zed:~# mdadm -D /dev/md0
    mdadm: md device /dev/md0 does not appear to be active.



    And I can't see the RAID array in the OMV web gui at all. Any assistance is appreciated, I would hate the lose all the data on the array.

  • I stopped the array with:


    mdadm --stop /dev/md0


    and am now trying to reassemble with:


    mdadm --assemble --force /dev/md0 /dev/sd[fgh]



    root@zed:~# cat /proc/mdstat
    Personalities : [raid6] [raid5] [raid4]
    md0 : active raid5 sdf[0] sdh[3] sdg[1]
    5860530176 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
    [>....................] recovery = 0.0% (2189352/2930265088) finish=3642.3min speed=13397K/sec


    unused devices: <none>


    3642 mins seems a long time but we'll see what happens!!

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