Date: Sat, 10 Jul 1999 21:43:20 -0700 From: John-Mark Gurney <gurney_j@efn.org> To: "Kenneth D. Merry" <ken@plutotech.com> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: microp 4421-07 fails on tags... Message-ID: <19990710214320.56085@hydrogen.fircrest.net> In-Reply-To: <199907110430.WAA19573@panzer.kdm.org>; from Kenneth D. Merry on Sat, Jul 10, 1999 at 10:30:41PM -0600 References: <19990710212118.49328@hydrogen.fircrest.net> <199907110430.WAA19573@panzer.kdm.org>
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Kenneth D. Merry scribbled this message on Jul 10: > John-Mark Gurney wrote... > > well, after a long time testing, the microp 4421-07: > > da0: <MICROP 4421-07 0329SJ 0329> Fixed Direct Access SCSI2 device > > > > has serious problems with tag queuing... the only way I was able to > > get this drive to work reliably was to turn of tags completely... does > > anyone have a drive with a different firmware that does do tags? > > > > if no one does, I'll just commit the attached patch.... > > You need to be a little more specific about how the drive is broken, and > how you tested it. the drive will not return ccb's (the ccb's will timeout) if you have 2 or more tags defined in the quirk structure... I tried various levels of tags from the default limit and 2, 8, 16, and 32 if I remeber correctly... all of those would cause a ccb to not be returned and end up timing out, and now that I have this entry in, I can run with the fs's on it no longer mounted sync (which helped prevent to many commands from hitting the drive)... since I didn't have the nice camcontrol ability to set tags, I had to build kernels to test this... of course this still doesn't address the fact that Justin hasn't gotten back to me on the fact that the adv driver is broken wrt chinon cdrom drives... -- John-Mark Gurney Voice: +1 541 684 8449 Cu Networking P.O. Box 5693, 97405 "The soul contains in itself the event that shall presently befall it. The event is only the actualizing of its thought." -- Ralph Waldo Emerson To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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