Re: IDE Driver in Linux Reports different geometry that Netware during Volume and Partition Create,

Jeff Merkey (jmerkey@timpanogas.com)
Mon, 13 Sep 1999 15:06:13 -0600

Boot messages report the wrong geometry as well. These newer drives use a
EIDE command to get the correct geometry and typically, at least in modern
times, don't rely on the information in CMOS since it can be incorrect.

Jeff

----- Original Message -----
From: Guest section DW <dwguest@win.tue.nl>
To: <jmerkey@timpanogas.com>; <linux-kernel@vger.rutgers.edu>
Sent: Monday, September 13, 1999 2:42 PM
Subject: Re: IDE Driver in Linux Reports different geometry that Netware
during Volume and Partition Create, causing loss of user data under Linux

> > With a MAXTOR 81750-A4 disk device, Netware reports that this disk
device
> > has a geometry of 850 cylinders, 64 heads, and 63 sectors per track.
>
> That sounds correct.
>
> > Under Linux, the same device reports a geometry of 780 cylinders,
> > 64 heads, and 63 sectors per track.
>
> I always repeat the same question: what are the boot messages?
> And in case you answer you might as well add the output of hdparm -I.
> My first conjecture in such cases is user error.
> For example, the disk may be entered incorrectly in BIOS/CMOS.
>
> Andries
> aeb@cwi.nl
>

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