HDD количество головок/цилиндров

Из man 8 fdisk

If possible, fdisk will obtain the disk geometry automatically. This is not necessarily the physical disk geometry (indeed, modern disks do not really have anything like a physical geometry, certainly not something that can be described in simplistic Cylinders/Heads/Sectors form), but is the disk geometry that MS-DOS uses for the partition table.

Да уж, кто бы в такой ситуации подумал заглянуть в ман... Спасибо.