[Veritas-bu] Raid5 or mirrored?
wei at colltech.com
Fri Nov 2 12:03:28 CST 2001
Software based RAID5 has particularly poor write performance when the write
size is small, since the RAID5 has to do a read, adjust parity and a
writeback. Unfortuantely small writes are what Netbackup mostly does in its
So, don't do it unless space and budget is your most pressing issue.
> From veritas-bu-admin at mailman.eng.auburn.edu Fri Nov 2 09:46:55 2001
> I'm setting up a file system for /usr/openv using volume manager with
> four disks, and I'm wondering if it would be better to make it a raid5
> system, or a concatenated mirror. If I use mirroring, then my disk
> space is limited to that of the two disks, but with raid5, I get an
> extra disk space. For performance reasons, what would be the best
> layout of disks?
> Veritas-bu maillist - Veritas-bu at mailman.eng.auburn.edu
Mike Wei Collective Technologies, a Pencom Company
Email: wei at colltech.com
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