Date: Fri, 23 Jan 2004 21:51:43 -0800 From: Rishi Chopra <rchopra@cal.berkeley.edu> To: questions@freebsd.org Subject: Adaptec 2400A Performance Message-ID: <401207EF.7030005@cal.berkeley.edu>
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I've run some imperical tests on the Adaptec 2400A raid controller (results and setup can be seen here): http://www.ocf.berkeley.edu/~rchopra/RaidResults.html I was rather disappointed with the results. Can anyone suggest what might be causing such slow disk speeds, or whether these speeds are out of the ordinary for a 4-disk FreeBSD RAID5 installation? I have done nothing to configure the card aside from striping the array in BIOS; FreeBSD seems to automatically detect the disks. I once ran a 2-disk RAID-0 installation on Win2k which was 6-7 times faster on sequential read/write tests (60-70MB/sec), hence my dismay. -- Rishi Chopra http://www.ocf.berkeley.edu/~rchopra
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