133 lines
3.1 KiB
HTML
133 lines
3.1 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of HD</TITLE>
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</HEAD><BODY>
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<H1>HD</H1>
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Section: Linux Programmer's Manual (4)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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hd - MFM/IDE hard disk devices
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<A NAME="lbAC"> </A>
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<H2>DESCRIPTION</H2>
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The
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<B>hd*</B>
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devices are block devices to access MFM/IDE hard disk drives
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in raw mode.
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The master drive on the primary IDE controller (major device
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number 3) is
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<B>hda</B>;
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the slave drive is
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<B>hdb</B>.
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The master drive of the second controller (major device number 22)
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is
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<B>hdc</B>
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and the slave is
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<B>hdd</B>.
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<P>
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General IDE block device names have the form
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<B>hd</B><I>X</I>, or
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<B>hd</B><I>XP</I>, where
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<I>X</I>
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is a letter denoting the physical drive, and
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<I>P</I>
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is a number denoting the partition on that physical drive.
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The first form,
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<B>hd</B><I>X</I>, is used to address the whole drive.
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Partition numbers are assigned in the order the partitions
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are discovered, and only nonempty, nonextended partitions
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get a number.
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However, partition numbers 1-4 are given to the
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four partitions described in the MBR (the "primary" partitions),
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regardless of whether they are unused or extended.
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Thus, the first logical partition will be
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<B>hd</B><I>X</I><B>5</B>.
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Both DOS-type partitioning and BSD-disklabel partitioning are supported.
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You can have at most 63 partitions on an IDE disk.
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<P>
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For example,
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<I>/dev/hda</I>
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refers to all of the first IDE drive in the system; and
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<I>/dev/hdb3</I>
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refers to the third DOS "primary" partition on the second one.
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<P>
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They are typically created by:
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<P>
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mknod -m 660 /dev/hda b 3 0
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mknod -m 660 /dev/hda1 b 3 1
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mknod -m 660 /dev/hda2 b 3 2
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...
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mknod -m 660 /dev/hda8 b 3 8
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mknod -m 660 /dev/hdb b 3 64
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mknod -m 660 /dev/hdb1 b 3 65
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mknod -m 660 /dev/hdb2 b 3 66
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...
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mknod -m 660 /dev/hdb8 b 3 72
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chown root:disk /dev/hd*
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<A NAME="lbAD"> </A>
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<H2>FILES</H2>
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<I>/dev/hd*</I>
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<A NAME="lbAE"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?1+chown">chown</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+mknod">mknod</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?4+sd">sd</A></B>(4),
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<B><A HREF="/cgi-bin/man/man2html?8+mount">mount</A></B>(8)
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<A NAME="lbAF"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">DESCRIPTION</A><DD>
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<DT id="3"><A HREF="#lbAD">FILES</A><DD>
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<DT id="4"><A HREF="#lbAE">SEE ALSO</A><DD>
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<DT id="5"><A HREF="#lbAF">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:01 GMT, March 31, 2021
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</BODY>
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</HTML>
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