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- From: rick@postmaster@hq.af.mil (Rick Weldon)
- Newsgroups: comp.unix.bsd
- Subject: Setting up bootable DOS pertition by hand
- Keywords: DOS
- Message-ID: <4500@hq.hq.af.mil>
- Date: 29 Jul 92 14:42:46 GMT
- Sender: news@Pt.hq.af.mil
- Reply-To: rick@hq.af.mil
- Organization: 7TH Communications Group
- Lines: 72
-
- I want to be able to boot DOS as well as 386BSD from the
- HD. I haven't seen much discussion on this specifically.
- Most of the discussion seems to be around accessing DOS
- from 386BSD.
-
- My questions though are centered around getting DOS to boot.
-
- I tried to use the automated install script and it blew up.
- I did as the release notes suggested and used fdisk to create
- a DOS partion on the beginning of the drive, but install munged
- things, so I ended doing a manual install to the whole disk.
- I used Chris Demetriou's method to install everything on seperate
- partitions. Boot from HD-- no problem --all is well.
-
- Now what I want to do is set up that DOS partition by
- hand. I want to use the first 30Mb of the disk and leave the
- rest for 386BSD. I am assuming that I will have to write the
- disklabel by hand taking into consideration the DOS partition.
-
- So I am assuming something like this:
-
- wd0a 32 Mb into the disk -- to 37 Mb
- wd0b 37 Mb to 42 Mb swap
- wd0c whole disk
- wd0d 0 Mb to 30mb for DOS
- wd0h 42Mb to end of disk
-
- Now the fun part.
-
- 1. If I put DOS on to the first 30 Mb of the
- drive how does the boot image know where to go to boot 386BSD.
- I would assume that it reads the disklabel and then looks for
- the kernel image 32 Mb into the disk on the wd0a partition.
- Is this the case?
-
- 2. When I shutdown todos I assume that the shutdown program
- tweaks the boot image to tell it to boot DOS instead, Or
- simply makes the DOS partition active. If the latter
- is true all I should have to do is run fdisk and de-activate
- the DOS partition to get back to 386BSD. This is where
- things get hazy, I was hoping someone might be able to explain
- this a little better. Another words how do I get back and
- forth between DOS and 386BSD.
-
-
- I also remember reading that a lot of people were having trouble
- with the shutdown -to-dos script. A complaint that shutdown
- couldn't make dos bootable or something similar. Was this ever
- resolved?
-
-
- Any help at all would be appreciated. I was hoping for
- something like Chris Demetriou's step by step, but edited
- to include how to set up a DOS partition by hand.
-
- Please post here.
- I read this group all of the time |-).
-
- (Have you ever noticed that the people who want the most
- information from a particular group don't read the group.
- They always ask for any helpers to e-mail because they don't have
- time to read the news.)
-
- If anyone cares I'll put the whole thing together and post it.
- I have Chris's step by step.
-
- Thanks so much to Bill, Lynne and Chris Demitriou
-
- --
- Rick Weldon I-NET Inc. (Pentagon, 7TH Com Group)
- E-mail: rick@hq.af.mil
- Phone: 703-695-5060
-