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Hi my Raid is going crazy. I Have a Raid 5 with 4x 3TB Drives and one drive dropped out. So I popped it back in and everything worked Fine But i Had run this and noticed that the Drive was not used.

Root@Parkplatz:~# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] 
md0 : active raid5 sdc[1] sde[3] sdd[2]
      8790405120 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [_UUU]

unused devices: <none>

I already added the drive with mdadm /dev/md0 --add /dev/sdb but than the computer crashed. Now I rebooted the computer. I have no Access to my Data and dont know Now to activate my Array again

root@Parkplatz:~# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] 
md0 : inactive sdc[1] sde[3] sdd[2] sdb[4]
      11720542048 blocks super 1.2

unused devices: <none>

I am runing Open media Vault so Debian i think...

  • give us more details, how did the computer crash? what OS are you running on? – hyph Mar 5 '17 at 20:47
  • Also, what do you mean by "going crazy". If the hdd light is going crazy its probably trying to rebuild/check itself. Also, you should stop using RAID5 - its unreliable with such a large array. – davidgo Mar 5 '17 at 21:37

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