DOS Command mirror
Type: External
Syntax:
MIRROR [d:]path [d:] path [...]
MIRROR [d1:][d2:][...] [/T(drive)(files)] [/partn][/U][/1]
Purpose: Used to store information about a disk`s file
allocation table, boot record, and root directory (to be used later
for file recovery). (In DOS Version 6, this program is stored on the
DOS supplemental disk.)
Discussion
The MIRROR command is used to save information that can be used
later for file recovery using the UNDELETE and UNFORMAT commands.
MIRROR creates a duplicate or MIRROR of this important information
in case the original information becomes unreadable. (New with DOS
Version 5.)
For each drive you specify, MIRROR creates a read-only file named
MIRROR.FIL on the disk`s root directory. The file contains all the
information that could be used later to recover deleted or damaged
files, or even to rebuild the file structure of the entire disk.
Options
/1 - Specifies that MIRROR should keep only one-data information
file, based on the latest information about the drive you specified.
[d:]path - Specifies the drives for which information will be saved
and used later for file recovery.
/partn
v Used to save a copy of the drive`s partition table on a diskette
in drive A.
/T - Loads a memory-resident deletion-tracking program into memory.
This program is used to keep track of files you delete.
/U - Unloads the deletion-tracking program from memory (as long as
no other memory-resident programs were placed in memory later.
When using the MIRROR command, do not specify a network drive or a
drive that has been previously specified using the JOIN, ASSIGN, or
SUBST command.
If you do not use the /1 option and MIRROR finds a file on the disk
named MIRROR.FIL, that file will be renamed MIRROR.BAK and a new
file named MIRROR.FIL will be created.
Examples
To save a file with disk-recovery information for drives C and D,
enter
mirror c:d:
This page is from http://www.easydos.com. I pasted it on my website to avoid possible broken links. For further help with DOS commands, Check easydos.com out.