Date: Thu, 21 Aug 1997 12:11:22 +0200 From: Andreas Klemm <andreas@wup.de> To: "Daniel M. Eischen" <deischen@iworks.InterWorks.org> Cc: freebsd-hardware@FreeBSD.ORG, syssgm@dtir.qld.gov.au Subject: Re: Quiet SCSI disk? Message-ID: <19970821121122.45543@wup.de> In-Reply-To: <199708210933.EAA13128@iworks.InterWorks.org>; from Daniel M. Eischen on Thu, Aug 21, 1997 at 04:33:08AM -0500 References: <199708210933.EAA13128@iworks.InterWorks.org>
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On Thu, Aug 21, 1997 at 04:33:08AM -0500, Daniel M. Eischen wrote: > > > [about the 4GB DCAS 34330W] > > > > >Do you know how many tags it uses (tagged command queuing) ? > > >It was a bit disappointing for me, that the IBM DORS 32160 2.1GB > > >only offers 3 and the the famous QUEUE_FULL condistion ... > > > > I run mine off a Diamond FirePort 40 (uses the 53c875J chip). When I run > > ncrcontrol, it tells me it is using 4 tags. I don't know if I can use > > more. I remember reading somewhere that Stefan thinks 4 is a good number. > > I can't remember his reasoning, or where I read it. :-/ > > My IBM 32160: > > sd0: <IBM DORS-32160W !# WA3E> type 0 fixed SCSI 2 > sd0: Direct-Access 2063MB (4226725 512 byte sectors) > > can do at least 16 tags. I've tested it under Linux with 16 > tags and use the default 8 tags under FreeBSD (both with aic7xxx > drivers). Ah, you have the Wide scsi disk ... I have the narrow modell. This can't do more than 3 tags. -- Wiechers & Partner Datentechnik GmbH phone: +49 2173 3964 161 Support Unix - Andreas Klemm fax: +49 2173 3964 222 An der alten Ziegelei 2 mail1: andreas.klemm@wup.de D-40789 Monheim mail2: andreas@FreeBSD.ORG
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