[CentOS] raid 1

[CentOS List]

>>>>> It might be easier to swap the old sdb into the sda position so 
>>>>> you'll boot from it, but you should also be able to boot the install 
>>>>> cd with
>>>>
>>>> If swapped and booted, and got a kernel panic error.
>>>
>>> What does it complain about?
>> <snip>
>> mounting root filesystem cfs: can't find ext3 filesystem on dev md2
>> mount: error 22 mounting ext
>> mount: error 22 mounting none switching to new root switchroot: mount 
>> failed: 22 unmount /initrd/dev failed: 2
>> Kernel panic - not syncing: attempted to kill init!
> 
> From the rescue mode boot, can you mount either /dev/md2 or the 
> underlying /dev/sd?2 from either of the disks.  If not, the raid isn't 
> your problem, it is the contents of the partition.

# mount /dev/md2 /mnt/part3
mount: Mounting /dev/md2 on /mnt/part3 failed: Invalid argument