HD(4)                     (2017-09-15)                      HD(4)

     NAME
          hd - MFM/IDE hard disk devices

     DESCRIPTION
          The hd* devices are block devices to access MFM/IDE hard
          disk drives in raw mode.  The master drive on the primary
          IDE controller (major device number 3) is hda; the slave
          drive is hdb.  The master drive of the second controller
          (major device number 22) is hdc and the slave is 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.  Parti-
          tion numbers are assigned in the order the partitions are
          discovered, and only nonempty, nonextended partitions get a
          number.  However, partition numbers 1en4 are given to the
          four partitions described in the MBR (the "primary" parti-
          tions), 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 sup-
          ported.  You can have at most 63 partitions on an IDE disk.

          For example, /dev/hda refers to all of the first IDE drive
          in the system; and /dev/hdb3 refers to the third DOS "pri-
          mary" partition on the second one.

          They are typically created by:

              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*

     FILES
          /dev/hd*

     SEE ALSO
          chown(1), mknod(1), sd(4), mount(8)

     COLOPHON
          This page is part of release 5.10 of the Linux man-pages
          project.  A description of the project, information about

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     HD(4)                     (2017-09-15)                      HD(4)

          reporting bugs, and the latest version of this page, can be
          found at https://www.kernel.org/doc/man-pages/.

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