Thread: mdadm RAID 5 Failure

after power outage lost 1/4 drives , spare supposedly kicked in never rebuilt.


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sudo mdadm --assemble --run --force /dev/md0 /dev/sdd1 /dev/sdf1 /dev/sdg1

mdadm: unknown keyword âdevice
mdadm: cannot open device /dev/sdf1: device or resource busy
mdadm: /dev/sdf1 has no superblock - assembly aborted
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rebooted server , ran --detail


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update time : sat jun 4 18:56:53 2011
state : active, degraded, not started
active devices : 2
working devices : 3
failed devices : 0
spare devices : 1

layout : left-symmetric
chunk size : 512k

name : ata_drives_01
uuid : bb2b61b9:2a562ab2:81e4a7a6:c5e8439b
events : 2493057

number major minor raiddevice state
0 8 65 0 active sync /dev/sde1
1 8 49 1 active sync /dev/sdd1
3 8 97 2 spare rebuilding /dev/sdg1
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it's been "rebuilding" 2 days now.... don't think doing though.

rebooted , tried again.


demigod@bas01:~$ sudo mdadm --examine /dev/md0
mdadm: no md superblock detected on /dev/md0.


sudo mdadm --assemble --run --force /dev/md0 /dev/sdd1 /dev/sdf1 /dev/sdg1
mdadm:/ input/output error
mdadm: /dev/sdg1 has no superblock - assembly aborted

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