Re: Mirror of an existing filesystem with 'md'

[Stephen Gardner <stephen-rhel uk org>]

On Mon, 4 Apr 2005, nathan r. hruby wrote:

> I think that should work, but do note that mdadm isn't present in
> rc.sysinit, so your mirror will not pop up at boot time.  If you want /
> need it at boot, you'll need to create an /etc/raidtab that's compatible
> with the older raidtools or add the correct mdadm commands to rc.local to
> have it mounted as part of the boot process.  IIRC, this is remedied in
> RHEL4.
>
> If information this is wrong, some one please tell me :)

Nathan,
    I believe you're right in that both  /etc/mdadm.conf  (primarily) and 
/etc/raidtab  (subsequently) are inspected and used in the 
/etc/rc.sysinit  on RHEL4. A note on this topic for RHEL3 users who are 
familiar with the raidtools is that the package is not shipped in RHEL4 so 
mdadm  operation may be useful to know if you're planning to use RAID on 
the newer release.

Regards,
   Stephen

References:

RHEL4 Release Notes
http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/release-notes/as-x86/