Date: Sun, 14 Mar 1999 21:14:54 -0500 From: "Chuck O'Donnell" <cao@bus.net> To: "Kenneth D. Merry" <ken@plutotech.com> Cc: scsi@FreeBSD.ORG Subject: Re: error messages from bt driver Message-ID: <19990314211454.A13537@milf18.bus.net> In-Reply-To: <199903142346.QAA14931@panzer.plutotech.com>; from Kenneth D. Merry on Sun, Mar 14, 1999 at 04:46:41PM -0700 References: <19990314162542.C11051@milf18.bus.net> <199903142346.QAA14931@panzer.plutotech.com>
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On Sun, Mar 14, 1999 at 04:46:41PM -0700, Kenneth D. Merry wrote: > Chuck O'Donnell wrote... > > > > Q: Is there any way to query the driver to find out how many tags are > > currently enabled for the drive? e.g., a camcontrol(8) option or some > > such? After I rebuilt the kernel and rebooted I couldn't tell for sure > > if the drive inquiry data had matched my new quirk entry and correctly > > adjusted the queue size for the drive. > > Yes, I've got some camcontrol mods that will do that for you. Grab the > patches from here: > > http://www.FreeBSD.ORG/~ken/camcontrol.diffs.031499 > > Type 'camcontrol tags -n da -u 4' (where "4" is the unit number of > the disk in question) to find out how many tags are allowed for that > device. > > camcontrol tags -v will give you more detailed information. > Works great! thanks. > > Attached below is a diff for the quirk, can you take a look and make > > sure I did it correctly? > > I would set the minimum to 2, but if the controller never tells us > that the queue is full for the drive in question, you'll never get > down that low.. I haven't quite figured out exactly what mintags does in the big picture yet, still reading through the code and doc. I think I found where it is used in cam_periph.c, I'll look more tomorrow. Thanks again. Chuck To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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