Re: mdadm gives segmentatin fault on wheezy. RAID array now incomplete.
Hendrik Boom <hendrik@topoi.pooq.com> writes:
> I ran
>
> mdadm /dev/md1 --add /dev/sdd2
>
> and got a segmentation fault.
>
>
> april:/farhome/hendrik# cat /proc/mdstat
> Personalities : [raid1]
> md1 : active raid1 sdb2[1]
> 2391295864 blocks super 1.2 [2/1] [_U]
>
> md0 : active raid1 sda4[0] sdc4[1]
> 706337792 blocks [2/2] [UU]
>
> unused devices: <none>
> april:/farhome/hendrik# mdadm /dev/md1 --add /dev/sdd2
> Segmentation fault
> april:/farhome/hendrik#
>
>
> /dev/sdd2 used to be part of the /dev/md1 RAID1 array, but it went bad,
> presumably becaues of a hard reset.
>
> I did a
>
> mdadm /dev/md1 --fail /dev/sdd2 --remove /dev/sdd2
>
> which appeared to work correctly, and after that
>
> april:/farhome/hendrik# cat /proc/mdstat
> Personalities : [raid1]
> md1 : active raid1 sdb2[1]
> 2391295864 blocks super 1.2 [2/1] [_U]
>
> md0 : active raid1 sda4[0] sdc4[1]
> 706337792 blocks [2/2] [UU]
>
> unused devices: <none>
> april:/farhome/hendrik# mdadm /dev/md1 --add /dev/sdd2
> Segmentation fault
> april:/farhome/hendrik#
>
>
> What now?
>
> -- hendrik
>
>
> --
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You might try writing zeros on the beginning of the device you are
trying to add. Something like
dd if=/dev/zero of=/dev/sdd2 bs=512 count=16
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