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Permanent Drive Mapping

The DOS command subst is used to assign a drive letter to a folder.

For example to use a drive letter M to access the folder c:\DATA you would enter

subst m: c:\DATA

If you want to make this assignment survive a reboot then you can modify the following registry key:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\DOS Devices]

and add a new string value


key
M:

value
\??\c:\DATA

If you’d rather not mess around in the registry, you can use the Persistent SUBST command from

https://code.google.com/p/psubst/

or Visual Subst available from

http://www.ntwind.com/software/utilities/visual-subst.html