High Priority Machine Check (Hpmc); Troubleshooting Hpmcs; Table 3-9 Hpmc Recovery Procedures - HP 9000 Series Service Manual

Troubleshooting

High Priority Machine Check (HPMC)

Another type of failure is the High Priority Machine Check (HPMC). An HPMC is an
abnormal condition which has compromised the integrity of system processing. A CPU
detects the HPMC and halts the system. Use the recovery procedures in Table 3-9 to
resolve the problem, or refer to the Troubleshooting HPMCs section.

Table 3-9 HPMC Recovery Procedures

Symptoms
System halts.
All user activity stops.
HPMC error message on console.

Troubleshooting HPMCs

When an HPMC occurs, the fault code is displayed on the front panel, and the console
displays the status. An HPMC is handled initially by Processor Dependent Code (PDC),
which builds an error log and displays chassis codes. When finished, it transfers control
back to the operating system.
In HP-UX, when control is given back, a panic dump is created. The operating system
saves a memory dump to a special location on disk and attempts to reboot the system.
The chassis codes displayed by PDC are no longer visible.
The HPMC error logs are different between models of the HP D Class Enterprise
Servers. Refer to the appropriate section depending on which model computer you are
troubleshooting.
To access the error logs, reset the system. When you get the PDC main menu, type SER
to access the service menu. Then type PIM to list the contents of the PIM dump. The
most important information to look at are the timestamp, HPMC chassis code,
requester/responder addresses, and memory plus I/O module error logs. HPMC chassis
codes are reported and logged by PDC for each processor detecting an HPMC.
3-16
Recovery Procedure
Record the sequence of 4-digit codes at bottom of
console display. (Press Control-B first.)
Record information from the HPMC:
1. From the Main Menu, enter SER to access
the Service Menu.
2. Enter the PDC command PIM.
3. Copy or print out the console display fields.
Perform a memory dump. (If the computer did not
respond to TC and you had to perform an RS hard
boot, do not perform a memory dump.)
Chapter 3