Some 8 core T6340's can have unexpected outage with Host Power Failure: MB_DC

Asset ID:	1-72-1540247.1
Update Date:	2017-11-29
Keywords:

Solution Type Problem Resolution Sure

Solution 1540247.1 : Some 8 core T6340's can have unexpected outage with Host Power Failure: MB_DC_POK Fault

Applies to:

Sun Blade T6340 Server Module - Version All Versions and later
Information in this document applies to any platform.

Symptoms

Some T6340's with 1.2GHz or 1.4GHz x 8 Core has unexpected outage and SP event log shows

Fault critical: "SP detected fault at time Tue Oct 27 18:17:32 2009. Host Power Failure: MB_DC_POK Fault"

Changes

Contributing Factors

T6340 systems with 1.2GHz or 1.4GHz x 8 Core and firmware prior to 7.2.4.f.

Cause

DC/DC converter noise problem triggers blade power shutdown.

Solution

Update SysFw to v7.2.4.f (SUNPATCH 139448-05 or later), which contains the fix to filter out noise

and prevent false power failure event.

References

<NOTE:1021650.1> - Sun Blade T6340 large blade configurations (1.2GHz or 1.4GHz x 8 core) show high fallout with power faults from CPU DC/DC converter.

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