Messages in this thread | | | Date | Wed, 15 Feb 2006 10:20:58 -0500 | From | Phillip Susi <> | Subject | Re: RFC: disk geometry via sysfs |
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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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