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Date:      Tue, 6 Aug 1996 11:43:25 -0500
From:      "James E. Leinweber" <jiml@slh.wisc.edu>
To:        dwhite@resnet.uoregon.edu
Cc:        questions@freebsd.org
Subject:   2.1.5-RELEASE generic kernel panics looking for mythical sd1a root
Message-ID:  <199608061643.LAA21108@stovall.slh.wisc.edu>
In-Reply-To: Doug White's message of Mon, 5 Aug 1996 20:00:25 -0700 (PDT) <Pine.BSI.3.94.960805195748.220C-100000@gdi.uoregon.edu>

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   On Mon, 5 Aug 1996, James E. Leinweber wrote:
   > I am experimenting with installing FreeBSD 2.1.5-RELEASE on a PC with both
   > an IDE and a SCSI disk, and have run into a boot snag.  After the
   > apparently successful install, when the generic kernel loads off of
   > /dev/sd0s2, it panics trying to mount sd1a as root, when it ought to
   > be mounting sd0a (or sd0s2a, to be pedantic).

Doug White responded: 
   Not again :( This problem came up a few weeks ago...

I'm sorry to say that it is back, and I'd call it a bug.  I'm not sure
if someone with two SCSI disks would have this problem; I'll have to
try that experiment on another machine.

   ... It's starting to roll through the mail archives, so some time
   spent there might coax it into releasing the eventual solution. 

I spent a while searching the archives and didn't turn it up, but
perhaps I didn't choose the right keywords to search on.

   Specifically giving the boot partition to the Boot:  prompt (ie,
   "sd(0,a)/kernel") should work.  I'm guessing the bootblocks may be getting
   confused by your IDE disks. 

Bravo!  The kernel duely informed me that the syntax to force it to use the BIOS
device 1 (i.e, the SCSI disk in a two disk IDE + SCSI computer) is:

	1:sd(0,a)kernel

And this works.  Thanks very much for the quick and helpful response.

-- James Leinweber
   State Laboratory of Hygiene                     <jiml@slh.wisc.edu>
   University of Wisconsin      Madison WI, USA        +1 608 262 0736



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