Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

◄Example►  ◄Syntax►
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                                SUBST──Notes
 
Using other commands with SUBST
 
The following commands do not work, or should not be used, on drives used in
the SUBST command:
 
ASSIGN           DISKCOPY          RECOVER
BACKUP           FDISK             RESTORE
CHKDSK           FORMAT            SYS
DEFRAG           LABEL             UNDELETE /S
DISKCOMP         MIRROR
 
Valid drive1 values
 
The drive1 parameter must be within the range specified by the LASTDRIVE
command. If not, SUBST displays the following error message:
 
    Invalid parameter - drive1:
 
Using SUBST with Microsoft Windows
 
Do not create or delete virtual drives using the SUBST command while
Microsoft Windows is running. If you want to create or delete a virtual
drive using the SUBST command, quit Windows, create or delete the virtual
drive, and then start Windows again.
 
Using SUBST with compressed drives
 
You can use SUBST to associate a path on a compressed drive with a drive
letter. However, the drive size and free space of the SUBST drive (for
example, as reported by the DIR command) might not match the drive size and
free space reported for the compressed drive.
 
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