Date: Sun, 1 Dec 2002 12:48:21 +0100 (CET) From: =?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@free.fr> To: "Ronald F. Guilmette" <rfg@monkeys.com> Cc: Wilko Bulte <wkb@freebie.xs4all.nl>, "Justin T. Gibbs" <gibbs@scsiguy.com>, <freebsd-scsi@FreeBSD.ORG> Subject: Re: Upgrade from Adaptec 2940UW to 29160N - Problem solved! Message-ID: <20021201124031.B2519-100000@localhost.my.domain> In-Reply-To: <15086.1038605400@monkeys.com>
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On Fri, 29 Nov 2002, Ronald F. Guilmette wrote: > In message <20021129202056.A59622@freebie.xs4all.nl>, you wrote: > > >On Fri, Nov 29, 2002 at 11:04:45AM -0800, Ronald F. Guilmette wrote: > >> > >> In message <2793220000.1038502309@aslan.scsiguy.com>, you wrote: > >> > >> >>>> The only mystery that still remains after this whole ordeal is ``Why > >> >>>> was it possible to boot from the mis-allocated partition back when I > >> >>>> was using the Adaptec 2940UW, even though it was clearly _not_ possible > >> >>>> to boot from the exact same bleedin' partition when using a newer and > >> >>>> ``more advanced'' Adaptec 29160N ? > >> >>> > >> >>> Most likely because the setting for "extended translation" was not the > >> >>> same on both controllers. > >> >> > >> >> Actually, it was. I am quite sure on that point. > >> >> > >> >> Both controllers had "BIOS support for disks > 1 GB" set to "disbled". > >> > > >> >And you use a geometry of 255/63? That's just plain wrong. 8-) > >> > >> It is? > >> > >> Who says it is? > > > >Justin, who happens to work Adaptec, and has been one of the chief > >developers of the FreeBSD SCSI subsystem > > OK. That's good enough for me. > > But I wish that some of this stuff was written down someplace, for > the benefit of poor ignorant sods like me who are just trying to > make their peripherials work. > > > P.S. As we speak, I am typing this on a machine whose root partition is > on my shiny new IBM 18GB SCSI drive, with geometry set to 255/63, *and* > the 29160N it is hooked up to is (I'm quite sure) set to "Support for > disks > 1GB" *disabled*. > > So if this isn't supposed to work, then somebody please explain to me > why it _does_ clearly work. The BIOS can read the partition table and fix your broken setup when possible. One BIOS is probably slightly more lazy than the other one. Gérard. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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