User`s guide
The
VAX-II
/730
diagnostic system provides flexibility concerning the load paths and execution control
of
different program levels. For example, the diagnostic supervisor and level 2 and level 3 programs can be
loaded from either
the
console load media
(TU58
tape drive) or from the system disk. If the primary mass
storage load path does not work properly, the
TU58
can load diagnostic programs which would help to
repair the load path problem. (Refer to
Chapter
5.) Although level 2 programs are flexible and run in the
user mode
or
in the standalone mode, level 2R, 3 and 4 programs are less flexible.
1.3 DIAGNOSTIC STRATEGY
CRD
forms the basis
of
DIGITAL strategy for VAX-I
1/730
system maintenance.
The
SYE
utility can be used to generate an error log report. Analysis
of
this report can be used to isolate
the problem to a failing subsystem/option.
Further
testing can be done using on-line diagnostics (level 2
and 2R) for fault isolation.
If the system
is
off-line,
CRD
can be used to identify the failing subsys-
tem/option. Individual microdiagnostics and level 3 macrodiagnostics can then be used to isolate to a field-
replaceable unit.
Implementation
of
a specific diagnostic strategy
is
area dependent (US,
GIA,
EUROPE).
1.4 V
AX-ll/730
REMOTE DIAGNOSIS OPTION
The Remote Diagnosis Option (KC730)
is
installed in the VAX-I
1/730
to allow an operator
at
a remote
terminal (at a remote support center) to perform the same operations as the local operator
at
the system
console terminal. These operations include booting the .operating system, controlling the system and
communicating with the user programs, and loading and running diagnostic. These operations are enabled
only when the local operator sets the VAX-I
1/730
keyswitch to the
REMOTE
or
REMOTE
DISABLE
positions.
The local
DIGITAL
field service representative
will
initiate any request for remote support; customer site
personnel will not be involved
in
this procedure.
NOTE
Normal system operation for the
VAX-llj730
is
not affected with the installation
of
the KC730
Remote Diagnostic Option.
1-4