hd(4) Device Drivers Manual hd(4) hd - MFM/IDE hd* -- MFM/IDE. (master) IDE ( 3) hda; (slave) -- hdb. ( 22) -- hdc, -- hdd. General IDE block device names have the form hdX , or hdXP , where X is a letter denoting the physical drive, and P is a number denoting the partition on that physical drive. The first form, hdX , is used to address the whole drive. Partition numbers are assigned in the order the partitions are discovered, and only nonempty, nonextended partitions get a number. However, partition numbers 1-4 are given to the four partitions described in the MBR (the "primary" partitions), regardless of whether they are unused or extended. Thus, the first logical partition will be hdX5 . Both DOS-type partitioning and BSD-disklabel partitioning are supported. You can have at most 63 partitions on an IDE disk. , /dev/hda IDE, /dev/hdb3 , "", DOS . , , : mknod -m 660 /dev/hda b 3 0 mknod -m 660 /dev/hda1 b 3 1 mknod -m 660 /dev/hda2 b 3 2 ... mknod -m 660 /dev/hda8 b 3 8 mknod -m 660 /dev/hdb b 3 64 mknod -m 660 /dev/hdb1 b 3 65 mknod -m 660 /dev/hdb2 b 3 66 ... mknod -m 660 /dev/hdb8 b 3 72 chown root:disk /dev/hd* /dev/hd* . chown(1), mknod(1), sd(4), mount(8) Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . hd(4)