Date: Sat, 29 Jun 1996 10:11:29 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: peter@taronga.com (Peter da Silva) Cc: scsi@FreeBSD.ORG Subject: Re: help writing a new SCSI device driver Message-ID: <199606291411.KAA04079@hda.com> In-Reply-To: <199606291232.HAA08596@bonkers.taronga.com> from "Peter da Silva" at Jun 29, 96 07:32:07 am
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> > >All drivers should support disconnection/reselection to permit > >adequate bus utilization. The gains are great - you will tie up > >the bus during disk seeks, etc. if you don't support it. > > The biggest problems would be with tapes, I would imagine, during > rewinds and things like that. Some tape operations can take an > extraordinarily long time... Most of those have special commands that detach and finish up specifically to support brain dead hardware. That isn't to say we always use those commands, though. -- Peter Dufault Real-Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
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