Boot from Raid

[Doug Hughes]

>
>I'm not sure that this "dd" method would work at all, tho.  How could
>it be made automatic?  Isn't the bootup going to be whacked  by
>the out of date vfstab?
>
>

All you need is one good stable image with a correct vfstab. It can
be relatively static. If one wanted to automate it, one could write
a wrapper for a program that edits the vfstab to propagate the changes
over to the other disk (or a daemon that does something similar). 
In most cases I think a static image would probably be sufficient in
an emergency. You could be back up and running in a few short minutes
(depending on fsck/recovery time of your file systems in event of a crash).

One advantage of a full mirror would be that in the event of a primary
disk failure, fail-over is automatic. I think I'd be more partial to
mirroring outside the array though (it's a setup/balance thing for us)
if I was going to do mirroring.

--
____________________________________________________________________________
Doug Hughes					Engineering Network Services
System/Net Admin  				Auburn University
			doug@eng.auburn.edu