检查系统时发现系统报错：

$errpt | head

BFE4C025   0529221011 P H sysplanar0     UNDETERMINED ERROR

查看对应的错误号，发现如下诊断信息：

$errpt -aj BFE4C025

……

Diagnostic Analysis

Diagnostic Log sequence number: 31453

Resource tested:        sysplanar0

Resource Description:   System Planar

Location:              

SRC=\'#\'" />Description:            Memory subsystem including external cache Predictive

                        Error, general. Refer to the system service

                        documentation for more information.

Additional Words:       2-030000F0 3-28EC0110 4-C13920FF 5-41000000

                        6-00811930 7-00000001 8-00A0008A 9-5600502A

Possible FRUs:

    Priority: M FRU: 00P5773  S/N: YL1081315356 CCIN: 30D5

    Location: U787B.001.DNW7118-P1-C9-C4)

……

由于可能是内存问题，查看一下具体的位置：

$lscfg -pv | grep -p DIMM

      Memory DIMM:

        Product Specific.(RT).......VINI

        Flag Field..................XXMS

        System Info Specific.(YL)...U787B.001.DNW7118-P1-C9-C4

        Customer Card ID Number.....30D5

        Serial Number...............YL1081315356

        Part Number.................00P5773

        FRU Number.................. 00P5773

        Size........................2048

        Version.....................RS6K

      Physical Location: U787B.001.DNW7118-P1-C9-C4

怀疑是之前仅仅更换了一个2G的内存后，该组内存的配对偶尔会出现问题，查看内存：

$lsattr -El mem0

goodsize  32000 Amount of usable physical memory in Mbytes  False

size      32000 Total amount of physical memory in Mbytes   Fasle

更换了一组内存，貌似ok了，等待后续变化。