Re: RAID 5 performance problems

From: Neil Schemenauer (nas@python.ca)
Date: Thu Apr 03 2003 - 14:13:12 EST


Ross Vandegrift <ross@willow.seitz.com> wrote:
> Absolutely correct - you should *never* run IDE RAID on a channel that
> has both a master and slave. When one disk on an IDE channel has an
> error, the whole channel is reset - this makes both disks
> inaccessible,
> and RAID5 now has two failed disks => you data is gone! *ALWAYS* use
> separate IDE channels.

I think it's okay to use both channels if you use RAID0+1 (also
known as RAID10), just be sure to mirror across channels. As a
bonus, RAID0+1 is significantly faster than RAID5.

  Neil
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