[lug] software raid

[Alan Robertson]

Sean Reifschneider wrote:
> 
> On Tue, Aug 21, 2001 at 09:34:47AM -0600, Harris, James wrote:
> >For example, if you want to boot your system off of a mirror, then you'll
> >need to compile the raid1 personality directly into the kernel (this may
> 
> The stock redhat kernels build the software RAID as modules, similarly to
> how they build SCSI drivers.  The "mkinitrd" script will then build the
> an initial ramdisc with those modules built in.  Works delightfully.

A caveat to this:
Don't use software raid on 2.2 kernels with a journalling filesytem - online
RAID rebuild can destroy the data -- because two separate caches are used
for the filesystem and the rebuild data.

	-- Alan Robertson
	   alanr at unix.sh