From owner-freebsd-hardware Mon Oct 25 9: 7:35 1999 Delivered-To: freebsd-hardware@freebsd.org Received: from panzer.kdm.org (panzer.kdm.org [216.160.178.169]) by hub.freebsd.org (Postfix) with ESMTP id 82870151E0 for ; Mon, 25 Oct 1999 09:07:20 -0700 (PDT) (envelope-from ken@panzer.kdm.org) Received: (from ken@localhost) by panzer.kdm.org (8.9.3/8.9.1) id KAA18836; Mon, 25 Oct 1999 10:07:03 -0600 (MDT) (envelope-from ken) Message-Id: <199910251607.KAA18836@panzer.kdm.org> Subject: Re: performance problem with scsi disk (3.3-RELEASE) In-Reply-To: from Didier Derny at "Oct 25, 1999 10:40:34 am" To: didier@omnix.net (Didier Derny) Date: Mon, 25 Oct 1999 10:07:03 -0600 (MDT) Cc: freebsd-hardware@FreeBSD.ORG From: "Kenneth D. Merry" X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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