Epson EQUITY 386/33 PLUS - Manual (Page 140)

Media Analysis
This test identifies the bad tracks on the hard disk by analyzing
the surface of the disk to find them. The program uses three
different bit patterns; formatting the disk, marking the bad
tracks, and displaying the bad track list.
Caution
The Media analysis test destroys any data on your hard disk.
Performance Test
This test checks the performance of your hard disk by
determining the data transfer rate and track-to-track seek time
based on the transfer size, the seek count, and the amount of
data transferred. The program measures the data transfer rate
in kilobytes per second. It reads 64KB of data 15 times and
counts the number of timer ticks using this formula:
Transfer rate = (64KB x 15 x 18.2) / # timer ticks
The program measures track-to-track seek time in milliseconds
using this formula:
Seek time = (# timer ticks x 1000) / 18.2 x 200
The number of seeks in this example is 200. A higher data
transfer rate and a lower seek time indicate better disk
performance.
Seek Test
This test checks the seek capability of the hard disk on the
specified range of cylinders and heads. The program performs
a series of sequential seeks followed by random seeks and
reports any errors.
B-18 Performing System Diagnostics