NUMDISKH()
 Determines the number of hard disks
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 Syntax

     NUMDISKH() --> nNumber

 Returns

     NUMDISKH() returns the number of physical hard disk drives.

 Description

     This function determines the number of physical hard disk drives (one or
     two).  These should not be confused with logical hard disk drives, that
     can be designated with DOS 3.3.

 Note

     .  The function receives its information from the BIOS.

 Example

     .  How many hard disk drives does my system have?

        ? NUMDISKH()         // Result:  1