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SubjectRe: RFC: disk geometry via sysfs
Alan Cox wrote:
>
> We have at least three
>
> Disk reported C/H/S
> BIOS reported C/H/S (hda/hdb only)
> Actual C/H/S (if it exists)
> Partition table C/H/S
>
> A partitioning tool needs to know
> Disk reported C/H/S
> Partition table C/H/S
> Preferably BIOS reported C/H/S if there is one
>

Why do you say the partitioning tool needs to know the disk reported
C/H/S? The value stored in the MBR must match the bios reported values,
not the disk reported ones, so why does the partitioner care about what
the disk reports?

> The partition table C/H/S is on disk so trivial
> The disk reported ones are in the identify block so could be pulled via
> /proc and sysfs
> The BIOS one is PC specific low memory poking around
>
> I agree entirely that HD_GETGEO itself shouldn't matter.
>

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