*BSD News Article 63535


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From: brazile@math.utexas.edu (Jason Brazile)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Booting from Removeable SCSI Drives
Date: 1 Mar 1996 23:42:58 GMT
Organization: Department of Mathematics, University of Texas at Austin
Lines: 29
Message-ID: <4h8222$ie4@geraldo.cc.utexas.edu>
References: <312FAC67.146F@wcupa.edu> <4gr07m$9a@uriah.heep.sax.de> <DnGBK4.8x@slugvine.demon.co.uk>
NNTP-Posting-Host: lanczos.ma.utexas.edu

In article <DnGBK4.8x@slugvine.demon.co.uk>,
John Stark <jas@slugvine.demon.co.uk> wrote:
>Will this allow me to boot from a removeable SCSI drive using a boot floppy?
>I have a Syquest EZ135 as SCSI ID 4, which FreeBSD can access as /dev/sd1.

I have successfully taken a bootable DOS ez135s catridge and turned it
into a bootable NetBSD/i386 cartridge. I used pfdisk to change the
partition ID to 165, made an /etc/disktab entry for it based on the
geometry given by pfdisk (e.g. NOT the "real" geometry reported by the
SCSI controller), disklabel'd  the cartridge (which also installed
biosboot blocks), newfs'd my partition and dump/restored an exisiting
root partition.

I suspect that one could do all of this starting with a bare cartridge,
pfdisk, and the *BSD install floppies (e.g. I conjecture that no magic
was performed during the initial step of making the cartrige a DOS
bootable cartridge - but it was nice to have it scan and possibly remap
any bad sectors).

The reason to use to BIOS geometry is for the biosboot blocks. If you
are not making a bootable cartridge, it will be fine to use the "real"
geometry as reported by SCSI controller (which is what I originally
did and had the same problem as you).

Also, I think you'll want your Syquest SCSI ID to be 0.

===
Jason Brazile 					brazile@math.utexas.edu
"People say I'm apathetic but I don't care" 	University of Texas