> I just upgraded my 2.1.119 system to add a 2nd RAID5 set. I have
> experienced several hard lockups (SYSRQ doesn't even work) with this new
> configuration (also experienced hard lockup with 2.1.120).
i have fixed several RAID5 lockups, these fixes are not yet in the main
kernel, but you might want to check out the latest alpha patch:
http://www.kernel.org/pub/linux/daemons/raid/alpha
> Can I have multiple RAID5's without any problem?
definitely.
> Can I mix IDE and SCSI without any problem?
the RAID5 driver puts quite heavy load onto the block layer, so bugs have
a better chance to pop up under RAID5. But otherwise it should work just
right.
-- mingo
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