Re: RFC: disk geometry via sysfs

[Phillip Susi]

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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