Some simple guidelines for running hd.com program to detirmine hard disk
interleave.

	1. detirmine disk param.  eg. hd /i   or   hd /i/2 (for second dr)

	2. detirmint no of sectors equiv for 10 mb  (on a seagare 225, with 
		614 cyl and 4 heads, 10 mb is approx 300 cyl

	3. run test as hd /s 300/r 300.  this seeks out 300 cyl as fast
		as possible, steps back verifying each track and then
		reads data from 300 cylenders. returning the time reqd
		for each of the abovd.

	4.  subtract slow step time from total read time (to get rid of it
		as a factor in transfer rate calc.

	5.  divide 10 mb by result from 4 in seconds,  this is the effective
		transfer rate of the hard disk.

	6.  the maximum possible transfer rate is approx 622 kb/sec as
		 detirmined by the design 5mbit/sec and 8bit per byte

	7.  approx numbers then are as follows

                      time        kb/sec        interleav
                       17          610            1:1
                       34          305            2:1
                       50          203            3:1
                       66          151            4:1
                       83          120            5:1
                       100         100            6:1

	8: the interleav should be 2 or 3 to 1 for a ibm AT and 4 to 1 for
		the PC or XT.