Date: Fri, 27 Jan 95 13:46:18 MST From: terry@cs.weber.edu (Terry Lambert) To: dufault@hda.com (Peter Dufault) Cc: john@pyromania.apana.org.au, hackers@FreeBSD.org Subject: Re: SyQuest works with FreeBSD 2.0R ! Message-ID: <9501272046.AA00266@cs.weber.edu> In-Reply-To: <199501271150.GAA07921@hda.com> from "Peter Dufault" at Jan 27, 95 06:50:47 am
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> > You need to be careful if you have more than one drive that you only use > > a single disk in a single drive for a system boot instance, since the > > OS (incorrectly) uses the device as part of the ident, and can get > > confused if you switch drives. > > I don't follow this. Is this a FreeBSD problem? It depends. 2.0R was specifically referenced. Current may not have that problem. [ ... ] > Actually, I think he will have a problem - UNIT ATTENTION is > generated when the removable drive is changed. 2.0R doesn't retry > at all on this, and 2.0-current will retry > but not for removable drives because of the chance of someone swapping a > mounted drive. This should never happen; the device should be locked during reference so that you can't remove the media. Most removable SCSI devices support this, as long as they are not manual eject. I think we are screwed on floppies unless we get media change notification. > > Also dual Bernoulli's and dual Syquest use LUNs on a single target to > > get two devices. Some of the SCSI drivers are "uncomfortable" with LUNs. > > I would suggest seperate drives at this time. > > Which drivers are uncomforable with LUNS? They shouldn't be too hard to > fix. We need some pioneers... I think that the sound-baster drivers fall into the "uncomfortable" category. Terry Lambert terry@cs.weber.edu --- Any opinions in this posting are my own and not those of my present or previous employers.
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