Sun Message ID: SUN4V-8000-PH

SUN4V-8000-PH

Single core modular arithmetic unit errors exceeded acceptable levels

Type

Fault

Severity

Major

Description

The number of modular arithmetic unit errors associated with this unit has exceeded acceptable levels.

Automated Response

Cryptographic software will not use this modular arithmetic unit.

Impact

System performance is likely to be affected.

Suggested Action for System Administrator

Schedule a repair procedure to replace the affected resource, the identity of which can be determined using fmdump -v -u <EVENT_ID>.

Details

The Message ID: SUN4V-8000-PH indicates a diagnosis has determined that one of the cores in the multi-thread processor contains a faulty MAU (Modular Arithmetic Unit). The faulty MAU is shared by all threads in the core and it will not be used by cryptographic software running on any of the eight threads in the core. However, the threads remain on-line and can be used by applications not requiring the MAU.

It is recommended that the system administrator contact Sun support and arrange for the replacement of the affected component. Use the command fmdump -v -u <EVENT_ID> with the <EVENT_ID> from the console message to locate the faulty component as shown in the example below.

# fmdump -v -u 305b067d-f256-46da-a172-b158c4c5f294
TIME                 UUID                                 SUNW-MSG-ID
Sep 26 11:55:44.0409 305b067d-f256-46da-a172-b158c4c5f294 SUN4V-8000-PH
  100%  fault.cpu.ultraSPARC-T2.mau

        Problem in: cpu:///cpuid=7/serial=FAC006B0E654482
           Affects: cpu:///cpuid=7/serial=FAC006B0E654482
               FRU: hc://:serial=110508:part=501781301/motherboard=0
          Location: MB

  100%  fault.cpu.ultraSPARC-T2.mau

        Problem in: cpu:///cpuid=6/serial=FAC006B0E654482
           Affects: cpu:///cpuid=6/serial=FAC006B0E654482
               FRU: hc://:serial=110508:part=501781301/motherboard=0
          Location: MB

                    .
                    .
                    .
   
  100%  fault.cpu.ultraSPARC-T2.mau

        Problem in: cpu:///cpuid=0/serial=FAC006B0E654482
           Affects: cpu:///cpuid=0/serial=FAC006B0E654482
               FRU: hc://:serial=110508:part=501781301/motherboard=0
          Location: MB

Note the FRU called out for each faulty thread is the same. In the example above, the FRU is the motherboard. Also note the FRU part number and location is included:

part=501781301

Location: MB

For more information, contact Sun Support.