CHKDSK Utility

     When rebooting the FOLDER.SYS driver checks all FOLDER-disks service
structures created on hard drives and specified in appropriate lines of the
configuration file  for FOLDER.SYS driver.

     The PTS-DOS CHKDSK utility makes the same sort of revision but much
more thoroughly and for FOLDER-disks created on any types of drives.  After
the CHKDSK start all service sectors of PTS-DOS are checked first.  Only
after finding and correcting all mistakes there the utility starts checking
FOLDER-disk structures.

     Usually CHKDSK utility dumps the following information on FOLDER-disk
under revision:

- validity of service sectors;
- total number of sectors reserved for data storage on the FOLDER-disk;
- number of sectors actually used to store data;
- number of free sectors, ready for data storage;
- free memory size in Kb on FOLDER-disk (from the PTS-DOS system
  viewpoint);
- free memory size in Kb on the FOLDER-disk (from the PTS-FOLDER
  system viewpoint).

NOTICE: If in rebooting the FOLDER.SYS finds errors and displays
        a message "Invalid internal structure" BE SURE to use the CHKDSK
        utility.

     The utility is started exactly in the same way as with regular disks.

     In the end of the work, if some errors were found and corrected, it is
recommended to reboot your computer to renew the disk copies of service
structures located in the conventional memory, otherwise you may loose
information.

     There is no need to reboot if mistakes were corrected on FOLDER-disk
created on a floppy diskette. Just withdraw the diskette from the drive and
re-insert it.

     It is possible to start the CHKDSK utility with  /C option.  The errors
found will be corrected. But it is NOT RECOMMENDED to work in this mode
since in the course of correcting some of the "defective" clusters will be
substituted by zeroes and you will not see which clusters contained errors.