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SubjectRe: RFC: disk geometry via sysfs
Alan Cox wrote:
> On Mer, 2006-02-15 at 10:01 +0100, Seewer Philippe wrote:
>
>> This would mean dropping the HDIO_GETGEO ioctl completely and force
>> applications such as fdisk/sfdisk and even dosemu to determine disk
>> geometry for themselves. Which I think actually would be the most
>> correct approach.
>>
>
> In the IDE case the drive geometry has meaning in certain cases,
> specifically the C/H/S drive addressing case with old old drives.

I thought that C/H/S addressing was purely a function of int 13, not the
hardware interface? If it is a function of some older hardware
interfaces, then we are still talking about two different, and likely
incompatible geometries: the one the disk reports, and the one the bios
reports. The values in the MBR must be the values the bios reports.


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