Fujitsu M10-1/M10-4/M10-4S: System Backup Memory Access Error on Power Supply Backplane

Asset ID:	1-72-1570216.1
Update Date:	2018-05-17
Keywords:

Solution Type Problem Resolution Sure

Solution 1570216.1 : Fujitsu M10-1/M10-4/M10-4S: System Backup Memory Access Error on Power Supply Backplane

Applies to:

Fujitsu M10-4S - Version All Versions to All Versions [Release All Releases]
Fujitsu M10-4 - Version All Versions to All Versions [Release All Releases]
Fujitsu M10-1 - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.
This page provides deeper info on the following Fujitsu fault codes: 011f0001, 01048010

Symptoms

Errors recorded on PSUBP but the component doesn't show as faulted in either showstatus or showhardconf.

Example:

XSCF> showlogs -Vv error
(...)
Date: Jul 02 14:28:10 CEST 2013
Code: 80000000-0090010000ff0000ff-011f00010000000000000000
Status: Alarm Occurred: Jul 02 14:23:15.867 CEST 2013
FRU: /BB#0/PSUBP
Msg: System backup memory access error
Diagnostic Code:
00000000 00000000 0000
00000000 00000000 0000
00000000 00000000 0000
00000000 00000000 00000000 00000000
00000000 00000000 0000
Date: Jul 02 14:28:08 CEST 2013
Code: 80000000-0090010000ff0000ff-010480100000000000000000
Status: Alarm Occurred: Jul 02 14:27:56.260 CEST 2013
FRU: /BB#0/PSUBP
Msg: SCF Diagnosis error on System backup memory
Diagnostic Code:
00000000 00000000 0000
00000000 00000000 0000
00000000 00000000 0000
49444941 47204552 52204e41 4e440000
00000000 00000000 0000

XSCF> showstatus
XSCF>

and

XSCF> showhardconf
......
        OPNL Status:Normal; Ver:0201h; Serial:PP132200GE;
            + FRU-Part-Number:CA20366-B07X 004AC/7060869;
        PSUBP Status:Normal; Ver:0101h; Serial:PP1323017Q;
            + FRU-Part-Number:CA07361-D202 A2   /7065595;
        PSU#0 Status:Normal; Ver:303746h; Serial:MD13050230;
......

Cause

This is a XCP firmware problem.

Solution

The fix for this issue is in XCP2051, please upgrade.

Although the product notes for XCP 2050 (or previous releases) still recommend to replace the Power Supply Backplane (PSUBP), this error can be safely ignored.

If the Power Supply Backplane should get degraded when this error occurs (i.e. the PSUBP gets marked with a (*) in the output of the "showhardconf" command),
please completely poweroff the server ( remove power cords ) and then power it on again.

If you have further questions regarding this problem, please open a Service Request.

Hint: It is strongly recommended to keep the XCP Firmware up-to-date. Links to corresponding Firmware downloads: M10-1 M10-4 M10-4S

Fujitsu provided the following details about the root cause of this error:

- Due to XCP bug, XSCF wrongly detects data corruption at FMEM on PSUBP.
"showlogs error" command shows you “Msg: System backup memory access error”.

- Firmware shows us two different behaviors depending on “timing” issue.

a) Firmware automatically makes recovery of PSUBP (RTIF2-121113-029)
In this case, a log, which is not have to be taken, is collected as above. What we have to do is, just ignore it.

b) Firmware deconfigures PSUBP though such deconfiguration is not really required (RTIF2-121129-001)
In this case, because PSUBP, which is mandatory portion to start system, is deconfigured, XSCF will reject request of power-on when requested. In this case, we need to disconnect power from box, move slide switch on operator panel to “service position”, connect power to the box, and move back switch to the original position. Then, XSCF will make recovery from deconfiguration of PSUBP.

- Firmware team is looking into how this bug should be fixed.

References

<NOTE:1537313.1> - M10-xscfu - A hardware problem has been detected with an XSCFU or PSUBP

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