MFM/IDE hard disk devices
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
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 refers to all of the first IDE drive in the
system; and /dev/hdb3 refers to the third DOS
"primary" partition on the second one.
typically created by:
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*
mknod(1), sd(4), mount(8)
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