[NCLUG] RE: [lug] "Poor" RAID performance?

[Riggs, Rob]

The hit from the writes should not be that great. It's probably the DAC960
driver then. We had fairly poor performance with the Mylex OEMed RAID
controllers from Dell a year or so ago, IIRC. The ones OEMed by Adaptec were
much faster.

-----Original Message-----
From: Sean Reifschneider [mailto:jafo at tummy.com]
Sent: Wednesday, March 06, 2002 1:39 PM
To: lug at lug.boulder.co.us
Cc: nclug at nclug.org
Subject: Re: [lug] "Poor" RAID performance?

I guess I was underestimating the hit that RAID-5 can have on writes, but
I'd expect with a butt-load of sequential writes that the controller would
be caching the data and not having to read from 4, update 2.  I'd expect it
to have enough data that it would be updating 6 all the time.