To: opendos AT delorie DOT com
X-Comment-To: Rob McGee <i812 AT iname DOT com>
References: <01FD6EC775C6D4119CDF0090273F74A4021FE2 AT emwatent02 DOT meters DOT com DOT au>
    <20010314032241 DOT C3024 AT sl7>
Message-Id: <2.07b7.99OE.GA6TPY@belous.munic.msk.su>
From: "Arkady V.Belousov" <ark AT belous DOT munic DOT msk DOT su>
Date: Wed, 14 Mar 2001 15:37:10 +0300 (MSK)
Organization: Locus
X-Mailer: dMail [Demos Mail for DOS v2.07b7]
Subject: Re: [ot] disk geometry mismatch?
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Reply-To: opendos AT delorie DOT com

X-Comment-To: Rob McGee

Hi!

14-Мар-2001 03:22 i812 AT iname DOT com (Rob McGee) wrote to opendos AT delorie DOT com:

RM> Thanks Joe. Do you think this was a BIOS limitation problem? I doubt it.
RM> The deceased motherboard was actually more recent than the one the drive
RM> is on now, and both BIOS' recognized the drive.

     There may be problem with LBA support: for example, old MB support LBA
and access your disk in LBA mode, whereas your current MB not support LBA
and try to access your disk in CHS mode only.

RM> I looked at the 4GB limit part, but although this drive is >4GB that
RM> does not seem to apply.

     BIOS limit is 8Gb, not 4Gb.

RM> This is a 15-head drive, but from reading that I
RM> understand that the 4GB limit only applies to 16-head drives.

     Nothing common. 16-head limit (from IDE itself!) causes 504Mb limit,
which BIOS goes around with trick, called "LBA mode on CHS drives".