[sclug] RedHat Software Raid

[Alex Butcher]

On Wed, 26 Jan 2005, Keith Edmunds wrote:

> On Wed, 26 Jan 2005 19:44:45 +0000 (GMT)
> Alex Butcher <lug at assursys.co.uk> wrote:
>
>> If you just use mdadm
>> to add the partitions on hdb back again
>
> That should work; personally I've never really got on with mdadm so I
> would do:
>
> # raidhotremove /dev/md0 /dev/hdb2
> # raidhotadd /dev/md0 /dev/hdb2

I recall using raidhotadd in the past, but it appears to be deprecated in
FC3, leaving mdadm as the only official way of administering an md RAID set.

[snip]

> - assuming hda2 pairs with hdb2 (if you're not sure, lookin /etc/raidtab to
> see).
>
> You might also want to consider putting the two drives on separate IDE
> controllers for (much) better performance - but maybe leave that for
> another day...

Eek! Yeah, I missed that. Definitely a bad idea to have drives in a RAID
pair on the same channel. In fact, the OP was lucky the problem didn't take
out /both/ drives at once!

> Keith

Best Regards,
Alex.
-- 
Alex Butcher      Brainbench MVP for Internet Security: www.brainbench.com
Bristol, UK                      Need reliable and secure network systems?
PGP/GnuPG ID:0x271fd950                         <http://www.assursys.com/>