[6021] in linux-scsi channel archive
Re: problem using both AIC-7880 and Adaptec 2940U/W together
daemon@ATHENA.MIT.EDU (Henrik Johansson)
Thu Mar 4 09:52:13 1999
Date: Thu, 4 Mar 1999 15:38:53 -0100 (GMT+1)
From: Henrik Johansson <henrik@lcdata.se>
To: John Interrante <interran@crd.ge.com>
Cc: linux-scsi@vger.rutgers.edu, dledford@redhat.com
In-Reply-To: <vc2k8wy20a1.fsf@winterran1crdge.crd.ge.com>
Of course, You're right! My appologies. :_)
Tricky indeed, The only factor left to work on that I can think of
would be the memory-adress assigned to the host-adapters.
If the Linux-driver detects the cards by scanning their memory-location
it would be a matter of assigning the "first" card to the lowest memory-
location. Never tried this on two so similar adaptec-cards under Linux
though, but I don't se any harm in trying. ;-)
Best of luck,
Henrik J.
On 3 Mar 1999, 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.
>
> John
>
> --
> John Interrante, Computer Scientist, Information Technology Laboratory
> GE Corporate Research & Development, Niskayuna, New York
>
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