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SubjectRe: IDE Driver in Linux Reports different geometry that Netware during Volume and Partition Create, causing loss of user data under Linux
Date

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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