Date: Fri, 11 Jun 2004 09:36:05 -0400 From: Don Bowman <don@sandvine.com> To: 'Frantisek Rysanek' <Frantisek.Rysanek@post.cz>, freebsd-scsi@freebsd.org Subject: RE: how to limit SCSI TCQ depth in FreeBSD? Message-ID: <FE045D4D9F7AED4CBFF1B3B813C85337051D8F79@mail.sandvine.com>
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From: Frantisek Rysanek [mailto:Frantisek.Rysanek@post.cz] > Dear SCSI experts and FreeBSD veterans, > > I'm looking for advice with an apparently simple SCSI issue: > how do I set a maximum TCQ depth in FreeBSD? > > Scenario: > - an U320 SCSI disk drive > - Adaptec 39320 (aic7902) == U320 & PCI-X > - FreeBSD 5.2.1 (and Linux 2.4.26, for comparison) > - Bonnie (-s 1500, 4x in parallel, to trash the RAM buffers) > - the system is a dual Xeon @ 2.6 GHz, 1 GB DDR266, > ServerWorks GC-LE (PCI-X) > ... drive timing out with high tag depth ... http://lists.freebsd.org/pipermail/freebsd-scsi/2003-August/000443.html shows a patch i did last year that achieves this. If you update the firmware on your drive you may find the problem is resolved as well. I cannot supply the firmware, but i can forward you a programming utility that may upgrade it for you. --don
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