There are several programs that need or can use TD_GETGEOMETRY, most of
them are low-level disk utilities. Often there is no documentation which
commands a device driver understands and not all programs using
TD_GETGEOMETRY give meaningful error messages, so you can use
TestGeometry first to check if your device does support it or not.

You should get correct information about the device geometry if
TD_GETGEOMETRY is supported, or "error -3 (command not supported by
device) reading drive geometry" if not.

Another possible use for TestGeometry (if the appropriate driver does
support TD_GETGEOMETRY) is to obtain the geometry of a certain disk,
for example for preparing it or for writing DEVS:DOSDrivers-files.
If you have a device driver with a good TD_GETGEOMETRY implementation,
like the omniscsi.device ("Guru-ROM"), you can get better values with
this program than from HDToolBox.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  732    1286  56.9% -lh5- 5a4b Aug 25  1995 TestGeometry/product-info
[generic]                 4104    7224  56.8% -lh5- 0c96 Aug 25  1995 TestGeometry/TestGeometry
[generic]                 1142    2455  46.5% -lh5- fe8b Aug 25  1995 TestGeometry/TestGeometry.doc
[generic]                 2448    9137  26.8% -lh5- 2d7e Aug 25  1995 TestGeometry/TestGeometry.mod
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         4 files    8426   20102  41.9%            Dec 24  1997