On Tue, 2010-03-16 at 23:50 +0900, Tejun Heo wrote: > e.g. If the first partition begins at CHS 0/32/33 and ends at > 12/233/19 and the corresponding LBA addresses are 2048 and 206848, you > can solve the equation and determine that the parameters gotta be 63 > secs/trk and 255 heads/cyl to make those two pairs of addresses match > each other and in fact some BIOSs try to do this depending on > configuration (and sometimes falls into infinite loop or causes other > boot related problems if the parameters are too uncommon). for an msdos label, this is illegal, that was Arnd's point. The partitions have to begin and end on cylinder boundaries*. Knowing that, you can deduce the geometry from the last sector entry. James * at least if you want to preserve windows compatibility, which is what most of our partitioning tools seem to do. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
