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From: MRTSI@CUNYVM (Mimi Tausner)
Newsgroups: comp.os.minix
Subject: Re: Help needed creating a 1.44Mb boot disk
Message-ID: <90272.053358MRTSI@CUNYVM.BITNET>
Date: 29 Sep 90 09:33:58 GMT
References: <3777.27033ef8@cc.curtin.edu.au>
Organization: City University of New York/ University Computer Center
Lines: 24

About a month ago I figured out how to make a 3.5 inch boot disk from an
original 5.25 disk under MINIX.  I couldn't figure out how to do it using DOS
utilities - which is what you asked for.  I don't know if this helps or not,
but this is what I did :

Starting with MINIX 1.3 -the AT version - this worked ...
  (The computer I used has a 5 1/4" drive in 0, and a 3 1/2" drive in 1).

  Use DOS to format 3 high-density 3 1/2" disks
       (At this stage, I am only copying MINIX disks 1, 2, and 3.)
  Boot MINIX 1.3 from the 5 1/4" disks.
  Logon as super-user.
  Copy /usr/bin/dd to /bin and unmount /dev/fd0.
  Make copies of disk 1 and 2 either by using
           dd if=/dev/fd0 of=/dev/fd1  # this results in 720 records in & out
    or     dd if=/dev/at0 of=/dev/at1  # this results in 2400 records in & out

  Make copies of disk 3 by using
           dd if=/dev/at0 of=/dev/at1  # this results in 2400 records in & out


Note that according to AST's message of 6 Sept <7469@start.cs.vu.n1> this
method will have to be changed for MINIX 1.5.  To create a 3 1/2" version of
highly packed disks, you'll probably want to use /dev/PS0 and /dev/PS1.