[6029] in linux-scsi channel archive
Re: problem using both AIC-7880 and Adaptec 2940U/W together
daemon@ATHENA.MIT.EDU (Doug Ledford)
Fri Mar 5 17:42:07 1999
Date: Fri, 05 Mar 1999 16:55:42 -0500
From: Doug Ledford <dledford@redhat.com>
To: John Interrante <interran@crd.ge.com>
Cc: Henrik Johansson <henrik@lcdata.se>, linux-scsi@vger.rutgers.edu
John Interrante wrote:
>
> Henrik Johansson <henrik@lcdata.se> writes:
>
> > I think the easiest way to solve this particular problem would be
> > to just disable the 2940U/W BIOS and compile the 2940U/W card as a
> > module.
>
> I'm not sure how this would help. Both the AIC-7880 and the Adaptec
> 2940U/W require the same driver (aic7xxx). So how would "compiling
> the driver as a module" help? The driver will have to be compiled
> into the kernel or else loaded using initrd before we can even mount
> the root filesystem. Will disabling the 2940U/W BIOS prevent the
> aic7xxx driver from recognizing that the card is present, so that the
> AIC-7880 will always be known as "scsi0?" If so, then how do we
> "insert" the 2940U/W later on and get the driver to create a "scsi1"
> bus for it?
>
> I was thinking that it might be necessary to hack the driver source
> code to force the AIC-7880 to be recognized before the 2940U/W, but I
> wanted to find out first if there was an easier way than editing the
> source code.
Disable the BIOS on the 2940 card and the reverse_scan option will then
work to let you pick which controller shows up first.
--
Doug Ledford <dledford@redhat.com>
Opinions expressed are my own, but
they should be everybody's.
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