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Contamination on Gold-Fingers of 541-3819 Memory Risers on X4470, SS7420 and T3-2 may cause Riser-Related Memory Faults (Doc ID 1451004.1)

Last updated on OCTOBER 20, 2021

Applies to:

SPARC T3-2 - Version Not Applicable and later
Sun ZFS Storage 7420 - Version Not Applicable and later
Sun Fire X4470 Server - Version Not Applicable and later
Information in this document applies to any platform.


The symptom of the failure is a memory riser fault with accompanying LED light, seen immediately after a host turn-on or during operation.

Alternatively a "show faulty" command at the SP prompt or an "fmadm faulty" command in the SP faultmanagement shell will indicate a faulty memory riser FRU.

The memory riser FRU will be identified as /SYS/MB/PX/MRY for x86 servers and as /SYS/MB/CMPX/MRY.

Where "X" and "Y" are processor numbers and memory riser numbers respectively.

Example fault locations:

For the X4470 and ZFS storage 7420: /SYS/MB/P1/MR0, /SYS/MB/P1/MR1

For the Sparc T3-2: /SYS/MB/CMP1/MR0, /SYS/MB/CMP1/MR1


For the X4470-based systems [Includes ZFS Storage 7420] the most common symptoms attributable to memory riser problems are:

SPX86-8002-JJ: Memory Branch lane failover

SPX86-8001-XH: Memory Not Present On Branch

SPX86-8001-YD: Memory located on a branch was not successfully initialized

For the SPARC T3-2 systems the most common failure modes attributable to the memory riser are:

SUN4V-8002-PX: Memory link lane failover

SUN4V-8002-Q2: Memory link unrecoverable error

SUN4V-8002-NE: Memory link recoverable CRC errors exceeded acceptable levels

Any other fault which is diagnosed by the SP or Solaris FMA to any of the /SYS/MB/PX/MRY frus should be treated similarly.

This document does not apply to faults that are diagnosed to a DIMM or group of DIMMs, only to faults which are diagnosed to the memory riser.




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