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hotswap(1) [debian man page]

HOTSWAP(1)						      General Commands Manual							HOTSWAP(1)

NAME
hotswap - register and unregister hotswappable IDE hardware SYNOPSIS
hotswap [ -c | --ide-controller N] [-h | --help] [-n | --nocheck] [-v | --verbose] [-V | --version] [ACTION] DESCRIPTION
hotswap allows you to register and unregister hotswappable IDE devices, for example notebook computer modules, with the Linux kernel. It has been developed on and for a Dell Latitude C600, but does not rely on any specific properties of that machine. By default, the command line utility guides you through the hotswapping process interactively. It is also possible to specify an ACTION, for example unregistering the current device, rescanning the IDE bus, &c. This feature is primarily intended for use with scripts and GUI frontends such as xhotswap(1). By using an XML configuration file, system administrators can specify arbitrary shell scripts to be run before and after registering and unregistering devices. This is particularly helpful for automatic configuration of CD-RW drives, which require SCSI emulation and bypass normal access via the IDE subsystem. By default, the configuration file is located at /etc/hotswaprc; its syntax is described in hotswaprc(5). OPTIONS
The program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). -c, --ide-controller N Use IDE controller N. -h, --help Print a brief help text and exit successfully. -n, --nocheck Do not perform sanity checks before attempting an action. Use with care, as this option may cause some steps to fail silently. -v, --verbose Print more information. -V ,--version Print version information and exit successfully. ACTIONS
Besides the above options, the program allows you to specify one of the following actions on the command line: probe-ide Detect the currently configured IDE device. mounted-ide Detect whether a file system on the currently configured IDE device is mounted. unregister-ide Unregister the currently configured IDE device. rescan-ide Scan the IDE bus for a new device. If a device has been found, register it with the kernel. If no ACTION is specified, interactive mode is entered. In this mode the program guides you through the hotswapping process as appropriate for the current configuration. NOTES
There is generally no need to manage floppy disk devices. The FDC is always present and configured. Floppy disk drives do not connect to the IDE controller, even if they come in the same modules as IDE devices and use the same connector. The Linux kernel requires hotswappable devices to be the only device connected to their IDE controller. The mounted-ide action assumes file systems have been mounted as /dev/hdc. If this is not the case (i.e., you've used a symbolic link such as /dev/cdrom) the command will not work. FILES
/etc/hotswaprc The default location for the XML configuration file. REPORT BUGS
Report bugs to t.stadelmann1@physics.ox.ac.uk. AUTHOR
Written by Tim Stadelmann. This manual page is based on an earlier version kindly contributed by Wouter Verhelst. SEE ALSO
xhotswap(1), hdparm(8), hotswaprc(5). COPYRIGHT
Copyright (c) 2002-2003 Wouter Verhelst, Tim Stadelmann. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License (GPL), Version 2 or any later version published by the Free Software Foundation. 4th November 2002 HOTSWAP(1)

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HD(4)							     Linux Programmer's Manual							     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 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 logi- cal 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. For example, /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. 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 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 1992-12-17 HD(4)

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