Data General NOVA ECLIPSE 6234 Service Manual page 94

Data General Corporation (OGC) 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 DGC and shall neither be reproduced in
whole or in part without DGC's prior written approval nor be implied to grant any license to make, use, or sell equipment manufactured in accordance herewith.
The reliability program executes a string of individual tests. A
detailed log of all surface related addresses, as well as a summary of •
all errors and seek/write/read statistics are available via keyboard
request.
4.6.l Using the Programs - Run the diagnostic program for two passes
(approximately 10 minutes) after a disk subsystem installation, then run
the reliability program for 30 minutes. The SA for the reliability
program is 505 octal which is also the RUNALL SA.
When troubleshooting the subsystem, the diagnostic program should be
run first to find the failing FRU. After FRU replacement, run the
diagnostic program for two error-free passes. Then run the reliability
test 505 - RUNALL for two passes.
4.6.2 Preparation for Running the Diagnostics - Use these programs to
verify subsystem performance after installation or to isolate problems
in the subsystem. For problems causing either the READY light, the DC
POWER light, or both to turn off, or the controller self test fault LED
(CR2) to turn on (Figure 4-23), refer to the troubleshooting flowcharts
in subsection 4.2. Otherwise, load the diagnostic.
CAUTION
For user data present on the rigid disk, back up the
data if possible. If backup facilities are not
available, limit diagnostic testing to the diagnostic
track of the rigid disk (301 octal).
The WRITE-PROTECT Switch is located at the front of the drive. To
reach this switch remove the front dress panel of the rigid drive. For
more information on this switch see Section 2, Operating Controls and
Procedures. For a drive suspected of having seek errors, set the
WRITE-PROTECT switch on to protect against data loss until the problem
is fixed. Otherwise, the WRITE-PROTECT switch should be in the off or
rightmost position. When in this off position the rigid drive is not
write-protected. Write operations can not be performed if the
WRITE-PROTECT switch is on. Write protecting the disk seriously limits
the diagnostic testing. The write-protect feature should never be used
when running diagnostics except to verify that the write-protect feature
works.
4.7 MODEL 6280 DIAGNOSTIC PROGRAM LOAD
To load the diagnostics refer to either the ADES Operator's Manual,
Data General P/N 014-000744, or the Field Service Maintenance Manual for
the host computer the disk subsystem is using.
4.7.1 Program Load Commands - When using ADES, enter the following
command to load the diagnostic program:
*PCDD DIAG
015-000133
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