Date: Wed, 25 Jun 1997 10:58:43 +0200 From: Stefan Esser <se@FreeBSD.ORG> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: jmz@cabri.obs-besancon.fr, freebsd-current@FreeBSD.ORG Subject: Re: ncrcontrol Message-ID: <19970625105843.31418@mi.uni-koeln.de> In-Reply-To: <199706250119.KAA26979@genesis.atrad.adelaide.edu.au>; from Michael Smith on Wed, Jun 25, 1997 at 10:49:41AM %2B0930 References: <19970624201859.14377@mi.uni-koeln.de> <199706250119.KAA26979@genesis.atrad.adelaide.edu.au>
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On Jun 25, Michael Smith <msmith@atrad.adelaide.edu.au> wrote: > Stefan Esser stands accused of saying: > > On Jun 24, Jean-Marc Zucconi <jmz@cabri.obs-besancon.fr> wrote: > > > This is with a kernel from june, 20 and a freshly rebuilt ncrcontrol: > > > > > > bash# ncrcontrol -u 1 -t 2 -s tags=0 > > > bash# ncrcontrol -u 1 -i > > > T:L Vendor Device Rev Speed Max Wide Tags > > > 2:0 MICROP 4110-09TBCU0322J HT01 10.0 10.0 8 4 > > > > > > It silently ignores the tags=0 parameter :-( > > > > Ummm, that's bad ... > > > > Seems I broke this when I modified the driver > > to respect the "NOTAGS" quirk in scsiconf.c ... :( > > > > If your drive does not work reliably with tags > > enabled, then we should add it to scsiconf.c ! > > Please do _not_ add this drive as not supporting tags! Ok. I was just not sure, why somebody wanted to disable tags for that drive. There definitely is a problem with dynamically adjusting the number of tags, and I know that I introduced it with some other changes, recently :( > silver:~>ncrcontrol > T:L Vendor Device Rev Speed Max Wide Tags > 0:0 MICROP 4110-09TBCU0322L HT01 10.0 10.0 8 4 > 2:0 CDC 94181-15 0293 ? 5.0 ? - > 3:0 CDC 94181-15 0293 ? 5.0 ? - > 4:0 CDC 94181-15 0293 ? 5.0 ? - > 5:0 CDC 94181-15 0293 ? 5.0 ? - > 6:0 iomega jaz 1GB H.62 10.0 10.0 8 4 > > This configuration is _very_ stable, and both the 4110 and the Jaz seem > to handle tags Just Fine. Of course if I could make the SCSI-1 disks > do TCQ as well, I'd be even happier 8) Well, those CDC drives are 1800RPM, 1MB/s, if I remember correctly ? Good drives at their time, but even tagged commands won't hide those ten years that went by, meanwhile :) Regards, STefan
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