Date: Wed, 02 Dec 1998 13:31:51 +0100 From: "Holger.Lenz" <Holger.Lenz@m.dasa.de> To: Dirk Lutzebaeck <lutzeb@aeccom.com> Cc: aic7xxx@FreeBSD.ORG Subject: Re: Async negotiation (Was: 2.0.36/5.1.4 and BIOS settings) Message-ID: <36653337.579550@m.dasa.de> References: <Pine.GSO.4.03.9812011638150.2728-100000@step.polymtl.ca> <3664EC5D.5828B43B@m.dasa.de> <13925.1885.506868.713337@kamet.aeccom.com>
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Dirk Lutzebaeck wrote: > Interesting that 5.1.4 doesnt care about the BIOS settings. I have > also bus hang problems with my Seagate DAT. I suspect its because the > u2w driver enables sync mode although async mode is set in the > BIOS. The DAT FAQ says to always use async mode... Bummer. I'm not so sure the driver isn't doing the RightThing(tm). The BIOS setting says not to _inititiate_ the sync negotiation, but maybe the target requests sync by itself (decent drives often have jumpers to have them initiate sync negotiation by themselves). Maybe someone very familiar with the SCSI spec could enlighten us here.. In any case, it would be nice to have a way to force async transfers to get around those buggy peripheral pitfalls. -- H.J. Lenz Munich Holger.Lenz@m.dasa.de Germany holgerlenz@franken1.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-aic7xxx" in the body of the message
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