GETDRIVES Get the drive letters of all mounted filesystems on the computer.
F = GETDRIVES returns the roots of all mounted filesystems on the computer
as a cell array of char arrays. For UNIX this list consists solely of the
root directory, /. For Microsoft Windows, it is a list of the names of all
one-letter mounted drive letters.
F = GETDRIVES('-nofloppy') does not scan for the a: or b: drives on
Windows, which usually results in annoying grinding sounds coming from
the floppy drive.
F = GETDRIVES('-twoletter') scans for both one- AND two-letter drive
names on Windows. While two-letter drive names are technically supported,
their presence is in fact rare, and slows the search considerably.
Note that only the names of MOUNTED volumes are returned. In particular,
removable media drives that do not have the media inserted (such as an
empty CD-ROM drive) are not returned.
See also EXIST, COMPUTER, UIGETFILE, UIPUTFILE.