🚀 go-pugleaf

peter@aci_1.aci.ns.ca (Peter Cormier) writes:

> I have read that the new MIRROR command will save disk recovery data to be 
> used by the UNFORMAT command.  My source indicates that a copy of the FAT 
> and root directory is saved in a file called MIRRORSAV.FIL, and that this 
> file is saved on the disk located in the drive specified by the MIRROR 
> command.  My question is this.  After a format command has been issued where 
> is the file MIRRORSAV.FIL located?  Am I wrong in believing that DOS uses 
> this file to restore the diskette to its condition as of the time the MIRROR 
> command was issued ?

  I do not have MS-DOS 5.0 (but DR DOS 6.0), but I think this stuff came
from Central Point and is similar to those in CP's PC Tools, which I
have (6.0).

  The MIRRORSAV.FIL file is located at the end of the disk and UNFORMAT
knows how to get it after a FORMAT. This will work for a hard-disk. For
a diskette it will work if you have not have done a destructive
(/DESTROY in PC Tools' PCFORMAT) format.

> It appears that Microsoft has once again produced a good piece of 
> software supported by poor documentation.

  They did not produce it, but bought it from CP. In the process they
forgot to supply the CP documentation. Do yourself a favor: Buy a book
on PC Tools (and a real OS like DR DOS 6.0 :-)).

Frank Slootweg