Date: Fri, 15 Oct 1999 11:14:54 -0600 (MDT) From: "Kenneth D. Merry" <ken@kdm.org> To: gallatin@cs.duke.edu (Andrew Gallatin) Cc: scsi@FreeBSD.ORG Subject: Re: FreeBSD 3.2 / Slow SCSI Dell PowerEdge 4300 Message-ID: <199910151714.LAA50233@panzer.kdm.org> In-Reply-To: <14343.16009.738375.608477@grasshopper.cs.duke.edu> from Andrew Gallatin at "Oct 15, 1999 11:00:16 am"
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Andrew Gallatin wrote... > >From the reports I've seen, it looks like Western Digital got their > act together and their Ultra2 drives are OK. Could we make the quirk > entry enable tagged queuing for Ultra2 WDE drives & disable it for > non-ultra2 drives? It would be tricky, since they seem have just added "ULTRA2" on the end of the device string. And it isn't worth changing the quirk without a full round of tests from someone with one of these disks. > Also, would it be possible to enable/disable tagged queuing from > camcontrol? Or to read the quirks from a config file (like Digital > UNIX does with its ddr.db file..). camcontrol negotiate allows you to temporarily enable/disable tagged queueing. If you set the DQue bit in mode page 10, it'll make the change permanent. Quirk entries are another matter altogether. In some cases, you'd probably rather have them read by the boot loader than camcontrol. It'll take a reasonable amount of design work to get an implementation that'll work correctly. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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