David Woodhouse dwmw2 at infradead.org
Mon May 22 10:21:53 EDT 2000

aeb at veritas.com said:
> A modern fdisk will use the values for heads and sectors/track given
> by HDIO_GETGEO, but ignore the value for cylinders.

> Indeed, since cylinders is a 16-bit field and the number of cylinders
> can be larger than 65535, the value may be truncated, and is to be
> considered worthless.

> Instead, the number of cylinders is computed as BLKGETSIZE/(H*S).

What if BLKGETSIZE/(H*S) isn't an integer?


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