Date: Wed, 6 Oct 1999 14:44:33 -0700 (PWT) From: Matthew Jacob <mjacob@feral.com> To: "Justin T. Gibbs" <gibbs@caspian.plutotech.com> Cc: Gerard Roudier <groudier@club-internet.fr>, "Justin T. Gibbs" <gibbs@plutotech.com>, Vadim Belman <voland@plab.ku.dk>, scsi@FreeBSD.ORG Subject: Re: 'Unexpected busfree' Message-ID: <Pine.LNX.4.04.9910061443590.1525-100000@feral.com> In-Reply-To: <199910062143.PAA11327@caspian.plutotech.com>
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> >> Also, for some older peripherals I've found that if they detect a parity > >> error when receiving data they just drop off the bus rather than go to the > >> bother of completing the command first. > > > >The behaviour of those old peripherals does not look that bad to me, > >even if some better one may be possible. > > Reporting sense information exonerates the device from your suspect list. > Without that information, you cannot assume that the device did not > simply lose its mind. The sense information will also allow you to > attempt to increase the reliability of the connection to the device > by lowering the sync rate or reverting to narrow transfers. Or, for some devices (e.g., ESP100 chips), even going to different onchip signal filtration.... -matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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