Very Poor Raid Card Performance

Wood, Russell Russell.Wood at
Tue Jan 16 23:51:12 UTC 2007

> -----Original Message-----
> From: owner-freebsd-questions at [mailto:owner-freebsd-
> questions at] On Behalf Of Ivan Voras
> Sent: Wednesday, 17 January 2007 7:04 AM
> To: freebsd-questions at
> Subject: Re: Very Poor Raid Card Performance
> Steven Lowry wrote:
> > The main problem is my HD performance, it is approx 6x slower than
> > windows XP, hopefully there is a solution. I have an LSI Megaraid 8x
> with
> > four drives in a raid 5 configuration, in windows I was getting upto
> 60MB/s
> > transfer rates but in FBSD I am getting upto 9MB/s. I followed the

I have an LSI MegaRaid with three drives at RAID 5: works a
god-damn-treat. I don't know what my throughput is on RAID 5 but RAID 0
was fast (70MB/s+).

Were you doing these tests a few hours after initializing the array, by
any chance? If so, then the poor performance could be because the array
was `in build' while you were using it, and therefore you'd get very
poor performance.

Russell Wood

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