From owner-cvs-all Sun Nov 18 9:31:40 2001 Delivered-To: cvs-all@freebsd.org Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by hub.freebsd.org (Postfix) with ESMTP id D3FBD37B405; Sun, 18 Nov 2001 09:31:28 -0800 (PST) Received: (from uucp@localhost) by srv1.cosmo-project.de (8.11.0/8.11.0) with UUCP id fAIHVDZ51744; Sun, 18 Nov 2001 18:31:13 +0100 (CET) Received: from mail.cicely.de (cicely20.cicely.de [10.1.1.22]) by cicely5.cicely.de (8.12.1/8.12.1) with ESMTP id fAIHNrp1048968; Sun, 18 Nov 2001 18:23:55 +0100 (CET)?g (envelope-from ticso@cicely8.cicely.de) Received: from cicely8.cicely.de (cicely8.cicely.de [10.1.2.10]) by mail.cicely.de (8.11.0/8.11.0) with ESMTP id fAIHNrI14370; Sun, 18 Nov 2001 18:23:53 +0100 (CET) Received: (from ticso@localhost) by cicely8.cicely.de (8.11.4/8.11.4) id fAIHNqL82273; Sun, 18 Nov 2001 18:23:52 +0100 (CET) (envelope-from ticso) Date: Sun, 18 Nov 2001 18:23:50 +0100 From: Bernd Walter To: Matthew Jacob Cc: Ian Dowse , cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/cam/scsi scsi_da.c Message-ID: <20011118182350.D80219@cicely8.cicely.de> References: <200111171734.aa67312@salmon.maths.tcd.ie> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.23i X-Operating-System: FreeBSD cicely8.cicely.de 5.0-CURRENT i386 Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sat, Nov 17, 2001 at 09:54:14AM -0800, Matthew Jacob wrote: > > > > In message , Matthew Jacob write > > s: > > >Do they really really hang, or does it simply take a very very long time to > > >flush out the cache on an MO? > > > > >From the PR: > > > > >>Description: > > >Fujitsu MO drives M2513A hang at various operations due to the synchronize cache > > >command (actually, after a few minutes the bus is reset and the disk can be > > >ejected). > > > > That's all the information I have - the mention of the bus resetting > > suggests that it is more than just a long delay (+ we have other > > similar quirks for Fujitsu drives). > > Hmm- rather than disable SYNC cache, maybe we ought to run up the timeout on > this command- it's only 5 minutes, which I could see as being slightly > marginal for an MO. 5 * 60s * 0.1M/s = 30M Which means the drive must be either slower than 100k/sec or have a cache bigger than 30M. I would say 5 min should be sane. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message