Sun Message ID: SUN4V-8001-MR

SUN4V-8001-MR

Link Framing Unit has encountered a single lane failure.

Type

Fault

Severity

Major

Description

A CPU chip's Link Framing Unit has stopped using a bad lane.

Automated Response

No other automated response.

Impact

The system's capacity to correct transmission errors between CPU chips has been reduced.

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-8001-MR indicates a problem in the interconnect between the UltraSPARC T2 Plus processors. No data has been lost. However, a data lane has been taken out of service which will reduce the system's ability to correct transmission errors and may impact system performance. The system is at increased risk of incurring an uncorrectable error, which will cause a service interruption, until the problem is resolved.

Use the command fmdump -v -u <EVENT_ID> with the <EVENT_ID> from the PSH console message to locate the suspected faulty components. For this fault, the fault manager identifies each thread in the processor as faulty as shown in the example below.

 
# fmdump -v -u 4a6ee8b0-129a-eaae-847d-c6c62860a110
TIME                 UUID                                 SUNW-MSG-ID
Jan 08 11:21:17.7669 4a6ee8b0-129a-eaae-847d-c6c62860a110 SUN4V-8001-MR
  100%  fault.cpu.ultraSPARC-T2plus.lfu-f

        Problem in: cpu:///cpuid=63/serial=FAD806CD143516C
           Affects: cpu:///cpuid=63/serial=FAD806CD143516C
               FRU: hc://:serial=100048:part=501784702/motherboard=0
          Location: MB

  100%  fault.cpu.ultraSPARC-T2plus.lfu-f

        Problem in: cpu:///cpuid=62/serial=FAD806CD143516C
           Affects: cpu:///cpuid=62/serial=FAD806CD143516C
               FRU: hc://:serial=100048:part=501784702/motherboard=0
          Location: MB

                   .
                   .
                   .

  100%  fault.cpu.ultraSPARC-T2plus.lfu-f

        Problem in: cpu:///cpuid=0/serial=FAD806CD143516C
           Affects: cpu:///cpuid=0/serial=FAD806CD143516C
               FRU: hc://:serial=100048:part=501784702/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=501784702

Location: MB

For more information, contact Sun Support.