Date: Mon, 25 Oct 1999 10:07:03 -0600 (MDT) From: "Kenneth D. Merry" <ken@kdm.org> To: didier@omnix.net (Didier Derny) Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: performance problem with scsi disk (3.3-RELEASE) Message-ID: <199910251607.KAA18836@panzer.kdm.org> In-Reply-To: <Pine.BSF.3.96.991025103743.23131A-100000@omnix.net> from Didier Derny at "Oct 25, 1999 10:40:34 am"
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Didier Derny wrote... > > hi, > > I've a performance problem with a quantum fireball ST disk (4.3Gb) > it runs fine with winblows95 and Beos4.5 but it's hell with FreeBSD > the read speed is normal but the write speed usually at 4.5Mb/s (iozone > 2.1) is reduce to less that 1.2Mb It's generally better to send SCSI problems to the freebsd-scsi list. In any case, try disabling tagged queueing on the disk. You can do it like this (assuming the disk is da0): camcontrol negotiate da0 -v -T disable Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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