Control Data Corporation CYBER 180 810 Maintenance And Parts Manual page 42

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DIAGNOSTICS
ON-LINE TESTS
Preventive maintenance time is used to prevent, rather than to detect failures,
and should occupy as little total system time as possible. To achieve this
goal, on-line diagnostic programs are used. These programs detect errors in
peripheral equipment and operating systems and enter the details in an error
log for examination by user or maintenance personnel. When a failure is
detected, isolation and correction can be attempted using peripheral processor
maintenance tool programs run as user jobs. The information in the error log
and the printout from the maintenance tool programs can be used to help solve
the problem.
The NOS and NOS/BE operating systems' on-line tests are listed below. For a
detailed description of these and other tests ref er to the applicable on-line
maintenance software reference manual.
The tests available are:
ALX - Random Instruction Test
CUS - CP Conunand Test
FSS - Product Set Microcode Validation
RAN - Random Number Conunand Test
CTS - Product Set Microcode Validation
MRG - Sequenced CPU Test
The NOS/VE on-line tests are run under the Diagnostic Virtual System. See the
Diagnostic Virtual System manual for tests and instructions for running them.
OFF-LINE DIAGNOSTICS
The Common Maintenance Software Executive (CMSE) provides off-line monitoring
for the system computer. It monitors the system hardware and loads and
executes maintenance and utility software. CMSE requires the following
hardware:
3 PPs (four if driving both a CC545 and a CCSSS)
3 IIO Channels
1
local console (CC545) or Viking X (CC634B)
1
remote console (CCSSS or TTY type)
1
tape drive (63X, 67X) or disk drive (ISO or 844)
subsystem
The following paragraphs briefly describe some of the off-line diagnostic
programs available. Detailed information is provided in the MSLlSX Off-Line
Maintenance Software Library Reference Manual, MSL151 Maintenance Software
Reference Manual, and MSLlSX Model Independent·Tests Maintenance Software
Reference Manual.
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