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Path: utzoo!utgpu!water!watnot!watmath!clyde!cbatt!cblpf!jpw
From: jpw@cblpf.UUCP
Newsgroups: att.sys.pc6300,comp.sys.att,comp.sys.ibm.pc
Subject: Problem with RLL upgrade.
Message-ID: <312@cblpf.UUCP>
Date: Tue, 31-Mar-87 10:49:20 EST
Article-I.D.: cblpf.312
Posted: Tue Mar 31 10:49:20 1987
Date-Received: Thu, 2-Apr-87 00:37:18 EST
Distribution: na
Organization: AT&T Bell Laboratories - Columbus
Lines: 26
Xref: utgpu junk:4950 comp.sys.att:270 comp.sys.ibm.pc:2643

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	I have recently attempted to upgrade my Xerox 6064 (a.k.a. ATT6300)
	with a 30 Meg hard disk.  The computer is equipped with ROM BIOS
	version 1.43.  The drive is a Seagate ST-238 with a Western Digital
	RLL controller.  The drive was checked by the dealer and formatted
	with IBM DOS 3.1.  When I initially accessed the drive, a "DIR" stated
	that I had the expected 32,XXX,XXX bytes free.  I went through the
	reformatting procedure outlined in the XEROX documentation to
	install their version of MS-DOS 3.1.   This included a physical
	format, paritioning and DOS formatting.  The drive was partitioned
	as a single drive.  A display of the partition configuration 
	states that the disk is 32 Meg.  When I boot this version of DOS
	and do a "DIR" it claims I have only 21,XXX,XXX bytes free.
			WHERE DID THE OTHER 10 MEGABYTES GO !!!
	The IBM DOS recognized the full capacity of the disk, yet the
	XEROX MS-DOS 3.1 does not.  What gives ?  As far as I can tell,
	I didn't commit any cockpit error, so I'm wondering about how
	DOS handles the differences between RLL and MFM encoding.


							Mike Vehonsky
							AT&T Network Systems
							Columbus, Ohio
							cbosgd!cblpf!jpw