[CentOS] mdadm: failed to write superblock to

Am 07.06.2012 13:48, schrieb Tilman Schmidt:
> Am 07.06.2012 09:48, schrieb sebastian:
>> # cat /proc/mdstat
>> Personalities : [raid1]
>> md0 : active raid1 sda1[2](F) sdb1[1]
>>         2096064 blocks [2/1] [_U]
>>
>> md2 : active raid1 sda3[2](F) sdb3[1]
>>         1462516672 blocks [2/1] [_U]
>>
>> md1 : active raid1 sda2[0] sdb2[1]
>>         524224 blocks [2/2] [UU]
>>
>> unused devices:<none>
>>
>>
>> I have remove the partition:
>>
>> # mdadm --remove /dev/md0 /dev/sda1
>> mdadm: hot removed /dev/sda1 from /dev/md0
>>
>> # mdadm --remove /dev/md2 /dev/sda3
>> mdadm: hot removed /dev/sda3 from /dev/md2
>>
>>
>> Now i want to add the old partition (to sync the raid), unfortunately,
>> comes an error message:
>> # mdadm --add /dev/md0 /dev/sda1
>> mdadm: failed to write superblock to /dev/sda1
>>
>>
>> What is wrong here?
> Looks like a hardware defect to me. That's probably also the reason
> why the RAID went degraded in the first place. Better replace that
> disk while the other one still holds the line.
>
> HTH
> T.
yes, of course, the hardware is defective. I was confused because I've 
only works something like this more often, and otherwise a resync works. 
I was this morning certainly did not fit ;)

thanks
>
>