DDS:  Disk Drive Summary in Turbo Pascal

                                  by

                             Earl F. Glynn
                           Overland Park, KS
                         Compuserve 73257,3527


DDS shows a disk drive summary of all active drives, including
bytes/sector, sectors/cluster, number of clusters, bytes
capacity, bytes available, and working directory.  SUBSTituted
"virtual" drives are not shown.

Information about the Disk Parameter Block and what I have termed
the "Drive Array" was found in the public domain program
SYSID.PAS by Steve Grant, Long Beach, CA.  I prefer to use
RECORDs and pointers to access this information instead of the
MEM and MEMW Turbo Pascal "arrays".

DDS does not work well if logical drives A and B are both active
and are the same physical drive.  The DOS prompt(s) may interfere
with the output.

DDS is very useful on machines with DOS 3.3 and large disk
drives.  For example, the IBM Model 80-111 has hard drives C, D,
E and F under DOS 3.3.  DDS will quickly summarize information
about all drives, including RAM disks.


File          D e s c r i p t i o n
------------  ---------------------------------------
DDS.PAS       Disk Drive Summary source program.
DDS.EXE       Execute DDS > DDS.OUT to create output.
DDS.OUT       Sample DDS output.
DDS.DOC       This file.



    Sample of DDS output:
---------------------------------------------------------------
Disk Drive Summary (Version 1, July 1989)
                                           Root Dir
      Bytes/                B y t e s      Entries     Working
Drive Cluster Clusters Capacity Available Max Current Directory
----- ------- -------- -------- --------- --- ------- ---------
  A     1024      713    730112  offline  112 offline A:\
  C     2048    16339  33462272  5031936  512     30  C:\TP\LIB
  D     4096     2170   8888320   851968  512     11  D:\DEMO
  E is LASTDRIVE