[mythtv-users] OT Help: mdadm segfault

[George Mari]

Steve MacLaren wrote:
[deleted]

> 
> If I physically unplug the power to one of the disks, mdadm.conf will
> assemble the remaining three disks into /dev/md0 on boot, but it won't
> mount.  Here's what I see:
> steve at mediaserver:~$ sudo mdadm --detail /dev/md0
> Password:
> /dev/md0:
>         Version : 00.90.03
>   Creation Time : Mon May  7 21:31:55 2007
>      Raid Level : raid5
>     Device Size : 488383872 (465.76 GiB 500.11 GB)
>    Raid Devices : 4
>   Total Devices : 3
> Preferred Minor : 0
>     Persistence : Superblock is persistent
> 
>     Update Time : Wed Sep 12 15:58:54 2007
>           State : active, degraded, Not Started
>  Active Devices : 3
> Working Devices : 3
>  Failed Devices : 0
>   Spare Devices : 0
> 
>          Layout : left-symmetric
>      Chunk Size : 128K
> 
>            UUID : bc7a4d90:bd286a91:c109596b:d7e29b7e (local to host
> mediaserver)
>          Events : 0.161
> 
>     Number   Major   Minor   RaidDevice State
>        0       8        1        0      active sync   /dev/sda1
>        1       8       17        1      active sync   /dev/sdb1
>        2       0        0        2      removed
>        3       8       33        3      active sync   /dev/sdc1
> 
> Then,
> steve at mediaserver:~$ sudo mount -t xfs /dev/md0 /var/lib/mythtv
> mount: /dev/md0: can't read superblock
> 
> 

You may want to try an fsck /dev/md0 before you try mounting it...