On Tue, 23 Jan 2001, Jared wrote:
> Hello Pluggers,
>
> I have an RH6.2 Installation. I would like my SCSI drive to be mirrored
> so I added another SCSI disk with exactly the same capacity (actually the
> same model). I put them on the same controller and partitioned the new
> disk (using FDISK of Linux) exactly the same as that of the primary disk.
>
> The partition that I want mirrored is /usr (in /dev/sda5) and /var (in /dev/sda6).
> The second disk has a /dev/sdb5 and /dev/sdb6 with exactly the same capacity
> and start/end on the same block as that of the primary disk. The /dev/sda1 will
> not be mirrored (as suggested in HOW-TOs).
Where did you find the HOWTO? It's safe to use /dev/sda1 if you know what
you're doing.
>
> I also defined a file raidtab under /etc.
>
> Next, I changed to INIT 1 so that I can unmount /dev/sda5 and /dev/sda6. The
> next thing I did is to run "mkraid /dev/md0" and mkraid /dev/md1" and this is where
> I encountered errors. So I did a --really-force option and it was fine with
>/dev/md0.
> When I did mkraid --really-force /dev/md1, it says that the super-block does not
>match
> the physical block size and it overlaps some blocks being used by /dev/md0. I
>stopped
> here and messed up everything.
Check again the partitions of those that are included in /dev/md0 and
/dev/md1, and recheck your /etc/raidtab.
_
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