Choosing A Stripe-Size (RAID5 Array)
Charles Swiger
cswiger at mac.com
Mon Oct 27 06:58:44 PST 2003
On Sunday, October 26, 2003, at 07:42 PM, Rishi Chopra wrote:
> I'm setting up a 600GB Raid-5 array (4-200GB 8MB Buffer IDE disks
> connected
> to an Adaptec 2400A controller) and would like some help picking a
> stripe-size (this is the smallest unit of data written to each disk by
> the
> raid controller.) My usage pattern is fileserver and webserver+db,
> some
> light desktop usage as well. I'll be using defaults for the file
> system
> (16K block size.)
Databases really don't interact well with RAID-5; you would be better
off using RAID-1 mirrors for the volumes which the DB uses. RAID-5 is
okay for fileserving if you're not write-intensive (ie, read-mostly)...
--
-Chuck
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