3-32 Troubleshooting
MPE/iX Monitor Halts
A monitor halt can be caused by either software or hardware. The console may not show a message
describing the condition. The sequence of hex codes that begins with a "Bx00" distinguishes it from the
Bx07 (system halt 7) code of a system abort. Use the procedures in Table 3-18. on page 3-32 to resolve the
problem.
MPE/iX System Abort
A system abort is a condition experienced by the operating system in which either system or data integrity
may be compromised by continued operation. While the causes of system aborts are many, the result is
always the same: the system immediately halts and displays system abort information on the physical
console (Ldev 20). All user activity stops.
A system abort message typically has the following format:
SYSTEM ABORT xxxx FROM SUBSYSTEM xxxx
SECONDARY STATUS: INFO = xxxx, SUBSYS = xxx {this line may not appear}
SYSTEM HALT 7, $xxxx
Use the recovery procedures in Table 3-19. on page 3-32 to resolve the problem.
If you have a system abort message on the console, it is probably unnecessary to copy down the hex display
pattern. However, if there was nothing printed on the console AND the hex display looks like that above (it
includes a "Bx07" sequence) then you have probably experienced a system abort which did not identify
itself on the console display. In this case, write the codes down. The Response Center can determine the
system abort number from this information.
Table 3-18. Monitor Halt Troubleshooting
Symptoms Recovery Procedure
System halts 1. Record error message on console if one appears.
2. Record the sequence of 4-digit codes at bottom of console display
(Press Control-B first.).
3. Take a memory dump. Refer to the Performing a Memory Dump
section for more information.
4. Restart the system when dump is finished.
All user activity stops.
No message on console (usually).
Sequence of 4-digit codes at bottom of
console display. (Press Control-B first.)
One of the codes is Bx00.
Table 3-19. System Abort Troubleshooting
Symptoms Recovery Procedure
System halts ("System Halt 7" message). 1. Record entire system abort message on console.
2. Record the sequence of 4 digit codes at bottom of console
display. (Press Control-B first.)
3. Perform a memory dump.
4. Restart the system when dump is finished.
All user activity stops.
System abort message on console (usually).
Sequence of 4 digit codes at bottom of console
display. (Press Control-B first.)
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