| .\" Copyright (c) 1993 Michael Haardt (michael@moria.de), |
| .\" Fri Apr 2 11:32:09 MET DST 1993 |
| .\" |
| .\" %%%LICENSE_START(GPLv2+_DOC_FULL) |
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| .\" published by the Free Software Foundation; either version 2 of |
| .\" the License, or (at your option) any later version. |
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| .\" Modified Sat Jul 24 16:56:20 1993 by Rik Faith <faith@cs.unc.edu> |
| .\" Modified Mon Oct 21 21:38:51 1996 by Eric S. Raymond <esr@thyrsus.com> |
| .\" (and some more by aeb) |
| .\" |
| .TH HD 4 1992-12-17 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| hd \- MFM/IDE hard disk devices |
| .SH DESCRIPTION |
| The |
| .B 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 |
| .BR hda ; |
| the slave drive is |
| .BR hdb . |
| The master drive of the second controller (major device number 22) |
| is |
| .B hdc |
| and the slave is |
| .BR hdd . |
| .LP |
| General IDE block device names have the form |
| .BI hd X\c |
| , or |
| .BI hd XP\c |
| , where |
| .I X |
| is a letter denoting the physical drive, and |
| .I P |
| is a number denoting the partition on that physical drive. |
| The first form, |
| .BI hd X\c |
| , 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 |
| .BI hd X 5\c |
| \&. |
| Both DOS-type partitioning and BSD-disklabel partitioning are supported. |
| You can have at most 63 partitions on an IDE disk. |
| .LP |
| For example, |
| .I /dev/hda |
| refers to all of the first IDE drive in the system; and |
| .I /dev/hdb3 |
| refers to the third DOS "primary" partition on the second one. |
| .LP |
| They are typically created by: |
| .RS |
| .sp |
| mknod \-m 660 /dev/hda b 3 0 |
| .br |
| mknod \-m 660 /dev/hda1 b 3 1 |
| .br |
| mknod \-m 660 /dev/hda2 b 3 2 |
| .br |
| \&... |
| .br |
| mknod \-m 660 /dev/hda8 b 3 8 |
| .br |
| mknod \-m 660 /dev/hdb b 3 64 |
| .br |
| mknod \-m 660 /dev/hdb1 b 3 65 |
| .br |
| mknod \-m 660 /dev/hdb2 b 3 66 |
| .br |
| \&... |
| .br |
| mknod \-m 660 /dev/hdb8 b 3 72 |
| .br |
| chown root:disk /dev/hd* |
| .RE |
| .SH FILES |
| /dev/hd* |
| .SH SEE ALSO |
| .BR chown (1), |
| .BR mknod (1), |
| .BR sd (4), |
| .BR mount (8) |