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- Documentation for file recovery utilities....
-
-
- I have included three programs useful for recovering lost files,
- such as ones that are mistakenly deleted, or a patching up an
- incorrect FAT. The three programs are PFAT, FAT, and TOSECT. When
- used together with DEBUG, it is possible to correct both of the above
- situations with some time and patience. I am writing a more complete
- DOC file explaining the mysteries of how this is done for DOS non-experts.
- For now, I am afraid the best I can do is to refer you to Appendix C
- of the PC-DOS manual for more information. It should be available in a
- couple of weeks.
-
- These programs probably only work with DOS 2.0 and later and only on
- DSDD floppies. They should work on an MS-DOS or PC-DOS system, however,
- since I restricted myself to DOS function calls.
-
- FAT.EXE
- This program allows simple modification of the FAT table. The
- two copies of the FAT table are read from drive B and compared
- to make sure they are consistent. The program will respond with
- a FAT> prompt. Responding with a hexadecimal cluster number will
- display the hexadecimal contents of the FAT table corresponding to
- that cluster. By typing a new hex value, that location can be
- modified and the next location is opened. To exit the program,
- type ^Z (control Z) after the FAT> prompt. The new FAT table
- will be copied to the diskette in drive 2 at this point. If you
- don't want the table to be modified, exit the program by typing
- ^BREAK.
-
- PFAT.EXE
- The FAT table is printed out in hex on the console. The output
- can be redirected to the printer where it will be easier to read.
- It is about 100 characters wide.
-
- TOSECT.EXE
- This utility program converts the cluster number in the FAT table
- to a logical sector number (as used by DEBUG).
-
-
- Questions or problems??? Contact Steve Turley
- 30539 Canwood St.
- Agoura Hills, CA 91301
- (818) 991-2847
-
- 2/2/85
-
- I am especially anxious to hear how this works with systems other
- than my Compaq.