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- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!darwin.sura.net!jvnc.net!nuscc!ntuix!eoahmad
- From: eoahmad@ntuix.ntu.ac.sg (Othman Ahmad)
- Subject: Re: Setting up bootable DOS pertition by hand
- Message-ID: <1992Jul30.063153.5126@ntuix.ntu.ac.sg>
- Organization: Nanyang Technological University - Singapore
- References: <4500@hq.hq.af.mil>
- Date: Thu, 30 Jul 1992 06:31:53 GMT
- Lines: 97
-
- In article <4500@hq.hq.af.mil> rick@postmaster@hq.af.mil (Rick Weldon) writes:
-
- : 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.
-
- I have posted an article tittled MSDOS and 386BSD 0.1
- There was no responses. I believe there are not many interested parties.
- I think the potential is large but not exploited yet.
- I am hoping you could join us in solving this problem.
-
- :
- : 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?
-
- You must tell it. There are two methods:
- 1) recommended in the INSTALL.NOTES is to run dos fdisk to set the 386bsd
- partition ACTIVE,
- 2) use other boot programs like bootany from SIMTEL but it did not work for me,
- or use shoelace in Minix or linux.
- :
- : 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
- You are right there.
-
- : 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.
-
- It is not so straight forward because there are so many flavours of fdisk in
- the MSDOS world. I do not use MSDOS 5, instead DRDOS 5 and MSDOS 4.
- I also use NU and NDD to edit the partition table and recover from
- mistakes. There are a lot of PD disk managers at SIMTEL which could be used
- as well.
- :
- :
- : 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.)
- I thought you are one of them.
- :
- : If anyone cares I'll put the whole thing together and post it.
- : I have Chris's step by step.
- I do care and hopefully you would succeed. Good luck.
-
- --
- Othman bin Ahmad, School of EEE,
- Nanyang Technological University, Singapore 2263.
- Internet Email: eoahmad@ntuix.ntu.ac.sg
- Bitnet Email: eoahmad@ntuvax.bitnet
-
-