From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <daf846be131f8634f5b332b184f9b549@plan9.bell-labs.com>
Subject: Re: [9fans] WD hard disk not available in partdisk
From: jmk@plan9.bell-labs.com
To: 9fans@cse.psu.edu
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Date: Fri,  5 Jul 2002 17:33:17 -0400
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John DeGood <nu3e@yahoo.com>:
	Based on reading the ATA-1 and ATA-2 specs
	(http://www.t13.org/project/d0791r4c.pdf and
	http://www.t13.org/project/d0948r4c.pdf) I agree that the if statement clauses
	in sdata.c appear to be reversed.

	FWIW, the ATA-6 draft (http://www.t13.org/project/d1410r3a.pdf) declares:
	----
	   8.15.26 Word 53: Field validity

	   Bit 0 of word 53 is obsolete.
	...
	   8.15.27 Word (58:54): Obsolete
	----
	Does this suggest that this code in sdata.c may cause problems in the future if
	it continues to always assume that the content of bit 0 of word 53 is valid?

Most likely this will eventually be a problem.

	> I've tested this on a WD AC2120 (125MB, my disc is smaller than your disc).

	I'd try my ST225 (21.4 MB), but I don't think its controller is supported. :-)

	John


My 40MB Conner CP3000 seems to work with the changes too.