From owner-freebsd-scsi  Tue Dec 22 14:38:41 1998
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Date: Tue, 22 Dec 1998 14:35:39 -0800
From: Julian Elischer <julian@whistle.com>
Organization: Whistle Communications
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To: "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
CC: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>, scsi@FreeBSD.ORG
Subject: Re: 3.0R && AHA1540A == no go
References: <199812222134.OAA14499@narnia.plutotech.com>
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Justin T. Gibbs wrote:
> 
> In article <19981222173104.28962@uriah.heep.sax.de> you wrote:
> > Hi all,
> >
> > today i've tried to install FreeBSD 3.0R on my scratch machine (that
> > used to run some 2.2.x variant before), and the installation kernel
> > failed with:
> >
> > (waiting 15 seconds blah blah)
> > panic: Inavlid CCB opcode code 3 hccb = 0xf05aad08
> 
> I believe that the 1540A does not support residual calculating
> CCB opcodes.  So, you'd have to modify the driver to use these
> opcodes on pre-historic devices.  Unfortunately it is impossible
> to get correct underrun information without these opcodes, so you'll
> have to get creative in this case and you may expose portions of
> the CAM code that become confused if the residual reported is incorrect.
> 
> --
> Justin
> 
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>From memory, the old driver tried to handle this case
so you might look there for clues...


julian

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