Zenith Z-100 Series, User Manual

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page 15
WINCHESTER SUPPLEMENT
T'a
ae PRF.P Utility
the outer tracks of the disk, the spacing between bits is
great enough so no significant shifting occurs and pre-
compensation is not required. However, since the inner
tracks have a smaller circumference, the bits are closer
together and precompensation is requried to maintain ac-
ceptable reliability. Enter 80 {the cylinder number where
precompensation must start) and press the ~ g g ] k e y.
Next, the screen will display:
Enter step rate code in hex;
Enter 1 {the rate code in hexadecimal at which the read/
write heads
" step" between tracks) an d p r ess t h e
g~ g g ] key.
Now that you have supplied the necessary information for your
hard disk, the program will initialize the surface of the disk
for the tests that follow. The initialization process is similar
to that used by the Z-DOS and CP/M-85 FORMAT utility in
that the surface of each disk is organized into tracks and sec-
tors. In addition, a "map" is also prepared for keeping track
of any sectors that are found to be bad.
During the initialization process, you will see the following dis-
play on the screen:
Initi a l i z ing the disk.,
If you have not installed the jumper on the controller board,
the system will immediately display:
Error during formatting of the drive.
and return to the Z-DOS prompt; the disk will not be affected.
Remember, to run the PREP utility, you must install the jumper
on the controller board as explained in Appendix B.
When the disk has been fully initialized, you will see:
..completed