OK, dann ist auch die Doku dazu irreführend (
http://wiki.delphi-jedi.org/wiki/JCL...IsDiskDevice):
If the path denotes a disk device the result is True, otherwise the result is False.
PathIsDiskDevice tests whether the supplied path denotes a disk device. On
Win32 systems the path to a disk device is always prepended with '\.' and that's what the function tests.