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Newsgroups: comp.os.386bsd.questions
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From: markl@twinsun.com (Mark La Rouche)
Subject: help with dos/386bsd partitioning a SCSI disk.
Message-ID: <C9xu59.Bso@twinsun.com>
Sender: usenet@twinsun.com
Nntp-Posting-Host: twinsun
Organization: Twin Sun Inc, El Segundo, CA, USA
Date: Sat, 10 Jul 1993 07:29:32 GMT
Lines: 46
I added an Adaptec 1542b SCSI controller and Micropolis 2.4 GB disk
to my 486 pc clone. I have an IDE disk with DOS and 386BSD partitions.
I use pboot to select the boot partition.
Now my problem. I first used a partition editor to create a DOS partition
table with two partitions on the SCSI disk(since the adaptec runs in
translation mode under DOS, yuck, I used the translation geometry to
specify the first partition and the start of the second). The first
is a DOS partition that I formated(I really don't need it but I wanted
the second partition to start on a cylinder boundary). The second
partition is for 386BSD that will use the remainder of the disk.
Eventually, I'll use the entire IDE drive for DOS.
Now(after creating the dos partition table, I booted 386BSD off the IDE
drive and created the following
partition table(these are the real drive parameters):
microp1924|Micropolis 1924 2.4BGSCSI: \
:dt=SCSI:ty=winchester:se#512:nt#21:ns#94:nc#2267:rm#5400: \
:pa#33558:oa#1974:ta=4.2bsd:ba#4096:fa#512: \
:pb#207270:ob#35532:tb=swap: \
:pc#4449396:oc#1974: \
:pd#4451370:od#0: \
:pe#414540:oe#242802:te=4.2bsd:be#4096:fe#512: \
:pf#1567356:of#657342:tf=4.2bsd:bf#4096:ff#512: \
:ph#2226672:oh#2224698:th=4.2bsd:bh#4096:fh#512:
I reserved about 12 cylinders at the end of the disk. This is based
on information I extracted from a format.dat entry for a Sun Microsystems
workstation.
I labeled the drive using `disklabel -w -r as0 microp1924'. The label
is written and I can newfs the partitions. But, when I reboot the system
I noticed that the dos partition table is wiped out. How do I keep
the DOS partition from getting destroyed? Obviously, I got things
working on the IDE but I don't remember what I did. I've also read
the 386BSD FAQs. Any hints?
Mark La Rouche Twin Sun Inc.
markl@twinsun.com 360 N. Sepulveda Blvd. Suite 2055, El Segundo, Ca 90245
--
Mark La Rouche Twin Sun Inc.
markl@twinsun.com 360 N. Sepulveda Blvd. Suite 2055, El Segundo, Ca 90245