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Full Discussion: Hard Disk Prep From Shell
Operating Systems Linux Fedora Hard Disk Prep From Shell Post 302611785 by Corona688 on Friday 23rd of March 2012 01:18:51 PM
Old 03-23-2012
The linux operating system automatically recognizes when disks are attached*, including USB disks and the like, and the corresponding devices under /dev/ ought to appear automatically too. But the only disk Linux automatically mounts is the root partition, right when it boots. From there on out, the kernel only ever mounts the disks it's told to mount.

So, automounting hotplugged drives is something done by application software, not Linux itself. The GNOME window manager tries to automount external disks for instance. Other times, the pmount suite is used to automount, and can also decide who's allowed to automount what.

And quite a few systems don't automount at all. Automount is useful for plugging in flash drives, but there are many situations you do not want disks to be automounted. A system with a software RAID for instance -- you want the RAID to control the disks itself, instead of them being grabbed by the automounter. Or a secure server, which would have no business mounting a strange drive unasked. Or a system being used for data-recovery on a spotty drive which is simply unable to be mounted. And so forth.

* The hardware has to support it of course. Any modern SATA port is technically supposed to be hotswap, but the feature isn't always implemented properly.
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mrd(1)							      General Commands Manual							    mrd(1)

NAME
mrd - mtools utility to remove a DOS directory SYNOPSIS
mrd msdosdirectory [msdosdirectories...] DESCRIPTION
The mrd command removes a directory from a DOS file system. If the directory is not empty, an error occurs. Unlike DOS conventions, this command allows multiple arguments. DOS subdirectory names that contain the '/' or '' separator are supported. If you use the '' separator or wildcards, you must enclose file names in quotes to protect them from the shell. The mcd command can be used to establish the device and the current working directory (relative to DOS), otherwise the default is A:. EXIT STATUS
The following exit values are returned: Success. Failure. ENVIRONMENT VARIABLES
The following environment variables affect the execution of mrd: If set, this variable names the file that contains the name of the current mtools working directory as established by the mcd command. If this variable is not set, the file $HOME/.mcwd is used. FILES
Contains the name of the current mtools working directory as established by the mcd command. If this file does not exist, the default mtools working directory is A:. Executable file SEE ALSO
Commands: mcd(1), mmd(1), mtools(1) mrd(1)
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