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From: dave@galaxia.network23.com (David H. Brierley)
Subject: How do I restore boot block on scsi disk? (FreeBSD 1.1.5)
Organization: Galaxia Computer Systems
Message-ID: <Cx6Hny.AL0@galaxia.network23.com>
Date: Wed, 5 Oct 1994 02:31:10 GMT
Lines: 29
I am running FreeBSD 1.1.5.1 on a 486DX/40 with a scsi disk controller as
its only drive controller. When I originally set the machine up I was using
an UltraStor 14f controller card that I had borrowed from work. Yesterday,
I received by Bus Logic BT-445S controller card and proceeded to install it
in the machine. Before I shut the machine down I built a new kernel with the
"bt" driver configured in. I then powered down the machine, removed the old
card and plugged in the new card. When I powered the machine back up again,
it would not boot, it just hung. At first I thought it was due to some kind
of incompatability between the controller cards and I was going to have to
dump the disk to tape and then reload, but then I decided to try booting from
the floppy and asking the floppy bootstrap to boot from the scsi disk. This
worked flawlessly and I was able to access the entire scsi drive (it is larger
than 1 GB so I was concerned about being able to access the entire drive). The
system is up and running again on the new controller, but if I need to reboot
I have to use the floppy and that is a pain.
I am assuming that one of two things is happenning. Either the first level
bootstrap code that was installed on the disk is somehow not compatible with
the BT-445S card, or I missed something in setting up the new card. So, my
question is two-fold:
1. To anyone using a BT-445S card: did you have to do anything special to get
it to be able to boot from a scsi drive?
2. To anyone who can answer: assuming that I have somehow scrambled the first
level bootstrap code on the drive, how do I restore it?
--
David H. Brierley Work: dhb@ssd.ray.com
3B1 Hacker Extraordinaire Home: dave@galaxia.network23.com