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From: billw@felix.UUCP (Bill Weinberger)
Newsgroups: net.micro.pc
Subject: Re: IBM PC/XT UPGRADE
Message-ID: <1178@felix.UUCP>
Date: Mon, 19-May-86 15:19:17 EDT
Article-I.D.: felix.1178
Posted: Mon May 19 15:19:17 1986
Date-Received: Fri, 23-May-86 06:09:23 EDT
References: <846@mhuxt.UUCP>
Reply-To: billw@felix.UUCP (Bill Weinberger)
Organization: FileNet Corp., Costa Mesa, CA
Lines: 26

In article <846@mhuxt.UUCP> bll@mhuxt.UUCP (Barbara Levin) writes:
>We have an old IBM PC/XT we are trying to upgrade from a 10MB to a
>20MB hard disk.  The old drive and controller were replaced with a
>SEAGATE 20MB disk and WESTERN digital controller.
>
>DOS 2.1 will not "see" the new hard disk, but IBM DIAGNOSTICS DO
>"SEE" IT AND IT TESTS OUT OK!
>
>We need HELP!

There is a high probability that the disk came preformatted for DOS 3.xx,
in which case DOS 2.xx will not be able to "see" it.  To get 2.xx to
acknowledge the hard disk, use the FDISK command to remove the current
DOS partition and define a new one (that takes up the whole disk).  The
reason 2.xx cannot see it is because 3.xx uses a larger File Allocation
Table format to break the disk up into smaller file allocation clusters
and you need to use FDISK (followed by FORMAT) to go back to the smaller
FAT.  I'd recommend, though, that you go ahead and get DOS 3.xx and use
it instead, mostly because it will use the smaller allocation chunks and
thus utilize the disk more efficiently.  In fact, I'm not sure DOS 2.xx
can handle the whole 20MB at once.  You *may* have to tell FDISK to
create 2 (two) partitions of 10MB each (drives C: and D:).
-- 
=========================================================================
Regards, Bill Weinberger 
FileNet Corporation       ...! {decvax, ihnp4, ucbvax} !trwrb!felix!billw