Specifications
INTRODUCTION
1
This manual lists the diagnostic messages
that
may be
returned to the operator (usually
on
the comment device)
by
Mass.
Storage Operating System
(MSOS)
Version 5 and the
major systems operating under it. The messages are grouped
into five major categories:
o
Ini
tializa tion
o General messages produced
by
the principal
MSOS
programs
that
refer
to malfunctions within the central
processing unit
(CPU) or directly associated with file
management
• Messages from background programs operating under
the job processor (many of these utilities may also be
called
by
foreground programs)
• Messages directly associated with input/output device
failures
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In
general, these diagnostic messages
are
for online opera-
tion. Methods for precise hardware diagnosis
are
described
in
the Operational Diagnostic System
(ODS)
Reference
Manual.
Many
input/output devices may have several
status
words. This manual lists only the principal
status
word,
which
is
saved
in
the physical device table as word
12
and
also is saved
in
the engineering log following an unrecover-
able error.
In
some cases, a few of these additional status
words are routinely saved
in
the unit's physical device table
and can be read directly from the proper slot
in
that
table
by
a user's program. For a full description of these
additional status words, the reader should consult the
hardware maintenance manual for the particular equipment
(controller).
Table 1-1 lists the systems described
in
the manual.
TABLE
1-1.
MANUAL
FORMAT
Section
2
3
96769450 A
Category/System
System Initialization
Initializer
Initializer
loader
Disk errors
Initializer
device failure
errors
General
System
General errors
Loader errors
File manager
errors
Comments
To
aid the user, these
messages, which come
from operations
that
are
interleaved,
are
labeled as to source ini-
tializer loader, disk, or
logical unit.
These errors
are
from
scheduling, dispatching
functions, etc.
These errors
are
for
re-
loca table binary load-
ing; same messages
are
used whether the fore-
ground or background
program is loaded.
These
are
the same
error messages whether
file manager is called
from the foreground or
background. The job
processor and
text
edi-
tor
files
are
treated
separately.
Section
4
Category/System
Recovery
Procedures
SYSCOP
messages
SCMM
messages
Engineering
file
Comments
System checkout is a
diagnostic program to
analyze the image of
core saved in mass
stor-
age
at
the time of fail-
ure. The program exe-
cutes online
at
a
low
priority level.
Small Computer Main-
tenance Monitor
(SCMM)
provides online
confidence
tests
for
error isolation
on
peri-
pheral devices.
It
is not
applicable
to
CYBER
18-20 or 18-30 Time-
share Computer
Sys-
tems.
This file contains the
status
of input/output
devices
at
the time of
each unrecoverable
error. Commands allow
the
user to view the file
contents online
at
any
time.
1-1