Subject: Re: geometry mismatch
To: None <port-i386@netbsd.org>
From: Manuel Bouyer <bouyer@antioche.lip6.fr>
List: port-i386
Date: 08/11/1999 20:56:07
On Wed, Aug 11, 1999 at 08:30:53PM +0300, Antti Kantee wrote:
> I get this with a brand new Quantum Viking II:
> NetBSD disklabel disk geometry:
> cylinders: 8338 heads: 5 sectors/track: 213 (1065 sectors/cylinder)
> 
> BIOS disk geometry:
> cylinders: 554 heads: 255 sectors/track: 63 (16065 sectors/cylinder)
> 
> Here's what the kernel probes:
> sd0: 4350 MB, 8338 cyl, 5 head, 213 sec, 512 bytes/sect x 8910423
> sectors
> 
> Note that in neither case the number of sectors looks quite right.
> Should I just trust what the kernel gives me, or...?

Yes. Modern disk have variable number of sectors per cylinders, depending
on where the head is, so the geometry the disks gives is a fake one anyway.

--
Manuel Bouyer <bouyer@antioche.eu.org>
--