[sclug] RedHat Software Raid

Alex Butcher lug at assursys.co.uk
Wed Jan 26 23:23:28 UTC 2005

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.


> - 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 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/>

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