Date: Mon, 9 Nov 1998 21:30:42 -0800 (PST) From: asami@FreeBSD.ORG (Satoshi Asami) To: ken@plutotech.com Cc: scsi@FreeBSD.ORG, nisha@cs.berkeley.edu Subject: Re: turning off tagged queuing with CAM? Message-ID: <199811100530.VAA08453@silvia.hip.berkeley.edu> In-Reply-To: <199811100322.UAA06848@panzer.plutotech.com> (ken@plutotech.com)
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* From: "Kenneth D. Merry" <ken@plutotech.com> * Satoshi Asami wrote... * > Hi Justin and Ken (and others :), * > * > Is it possible to turn off tagged queuing with the current version of * > CAM? There used to be an AHC_TAGENABLE variable but it seems to have * > gone away. I looked at the mode pages but couldn't find anything * > suspicious. * > * > Here's one of the systems: * [ ... ] * * You can do a couple of things: * * - put a quirk entry in cam_xpt.c and set the minimum and maximum tag * counts to 0. (there are a couple of examples for that) I see. * - edit mode page 10 (0x0a) and set the DQue bit to 1. Mode page 10! Didn't know there were that many. I got an error at page 5 and 6 and thought that was it. ;) * Either one of those will do what you want. * * I guess you must have a firmware problem that makes you want to disable * tagged queueing? Actually no, we just want to see how much effect it has on performance. Being able to turning it off on a per-disk basis would be very nice. Thanks. * Ken * -- * Kenneth Merry * ken@plutotech.com Satoshi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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