Date: Thu, 28 Apr 2005 09:22:01 -0700 (PDT) From: Arne "Wörner" <arne_woerner@yahoo.com> To: Steven Hartland <killing@multiplay.co.uk>, Eric Anderson <anderson@centtech.com> Cc: freebsd-performance@freebsd.org Subject: Re: Very low disk performance Highpoint 1820a Message-ID: <20050428162201.39269.qmail@web41214.mail.yahoo.com> In-Reply-To: 6667
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--- Steven Hartland <killing@multiplay.co.uk> wrote: > Only on write this is a read test. > Oh. Ok! :-) But there is a striping-like effect (especially when u use n=8 discs in one RAID-5 and when u do sequential read), so that the performance could be easily (n-1)*40MB/sec (which would be in your case 350MB/sec; my single ATA disc reads 40 or about 40 MB/sec). So I would say, that something in the ATA driver is sub-optimal and worse than before. But I do not know what... There are so many lines... -Arne __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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