Data General NOVA ECLIPSE 6234 Service Manual page 110

Data General Corporation (DGC) has prepared this manual for use by DGC personnel and customers as a guide to the proper installation. operation, and
maintenance of DGC equipment and software. The drawings and specifications contained herein are the property of OGC and shall neither be reproduced in
whole or in part without OGC's prior written approval nor be implied to grant any license to make, use. or sell equipment manufactured in accordance herewith.
SA
505
506
507
510
Table 4-16.
Reliability Program Descriptions (Page 4 of 4)
Program Name
Description
NOTE
This program is not intended to be a diagnostic program
for the disk subsystem and in general assumes the control
and drive to be properly operating.
A hard address error is defined as; after two attempts
have been made and both attempts result in an address
error. A hard data error is defined as; after up to eight
read retries have been made and one or more of the retries
has been unsuccessful.
RUN ALL
Seek exerciser
Random seek exerciser
Error Count/Log
recovery
This program sequences through the
following programs in a "top down"
fashion:
SA 501 - PAT, RAN, FLZ,· FLO
SA 502 - ROT (3 times}
I
RAN, ADR, ONES,
ZEROS, ALT
SA 507 - Random seek exerciser.
This program provides a seek scan
sequence converging from the extreme
outermost tracks into the adjacent
center track and then diverging again to
the extremes. All seeks are followed by
a one sector read with no data check.
All seeks are timed with maximum,
minimum, and average times logged in
milliseconds. Seek paths for maximum
and minimum values are also logged.
This is a read only program and requires
that the disk pack be previously written
to.
This is the same as SA 506 except that
the seek sequence is random.
In the event a program stopped during a
run, the error logs may be recovered at
this starting address. This must be
done before any program restarts as the
program initialization zeros all logs •
015-000133
4-66
•
•
•