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

I'll give the CMOS a check to see if it's configured wrong. What's puzzling
here is that Netware seems to view it one way and Linux another. The
missing 70 cylinders don't bother me as much as cross-platform compatibility
issues with different OS's seeing drives differently. Just for fun, I
changed the code to ignore the bogus geometry and the netware volumes that
were in the partition that spanned past 780 (to 850) mounted fine, with
Linux able to address sectors beyond cylinder 780. However, what gets
reported to the utility (fdisk, nwdisk) is smaller than the actual drive
(780) which means folks will be forced to allocate netware partitions that
are smaller than the device allows. I will study this problem in more
depth, and let you know what I find. I'll also let dwquest know what I see
also.

Your friend,

Jeff

P.S. Totally Kick-Ass IPO -- RedHat is **SMOKING** on Wall Street right
now..

----- Original Message -----
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jeff Merkey <jmerkey@timpanogas.com>
Cc: <dwguest@win.tue.nl>; <linux-kernel@vger.rutgers.edu>
Sent: Monday, September 13, 1999 5:01 PM
Subject: Re: IDE Driver in Linux Reports different geometry that Netware
during Volume and Partition Create, causing loss of user data unO


> > 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.
>
> Linux trusts
>
> User command line settings (user set)
> The partition table (user settable)
> The BIOS (user settable probably)
> The Driver (not user settable)
>
> The order isnt co-incidental
>
> Alan
>
>
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