hd0,0) is the first partition of the first hard disk. On a common desktop machine with a hard disk connected as primary master, the corresponding Linux device name is
The four possible primary partitions are assigned the partition numbers
3. The logical partitions are numbered from
(hd0,0) first primary partition of the first hard disk (hd0,1) second primary partition (hd0,2) third primary partition (hd0,3) fourth primary partition (usually an extended partition) (hd0,4) first logical partition (hd0,5) second logical partition
Being dependent on BIOS devices, GRUB does not distinguish between IDE, SATA, SCSI, and hardware RAID devices. All hard disks recognized by the BIOS or other controllers are numbered according to the boot sequence preset in the BIOS.
Unfortunately, it is often not possible to map the Linux device names to BIOS device names exactly. It generates this mapping with the help of an algorithm and saves it to the file
device.map, which can be edited if necessary.