Sun Fire V1280, E2900 and Netra 1280, 1290: DC-DC convertor voltage failure. Voltage ramp timed out after 500 msec. (Doc ID 1269016.1)

Last updated on OCTOBER 01, 2020

Applies to:

Symptoms

During recovery from an AC power outage, the following errors may be seen for a particular system board:

Tue Nov 16 11:12:28 qalw8-4sc lom: /SB0: RepeaterHpu.prepare: sun.serengeti.HpuFailedException: /SB0/bbcGroup0/cpuAB: 
CpuSafariGroup.setPower: DC-DC convertor voltage failure. Voltage ramp timed  out after 500 msec.
Safari Group being powered down
Tue Nov 16 11:12:28 qalw8-4sc lom: sun.serengeti.HpuFailedException:
/SB0: unable to prepare board due to SBBC group failure.

The key signature for this issue in the errors are:

• Voltage ramp timed  out after 500 msec
• DC-DC convertor voltage failure
• Safari Group being powered down
• unable to prepare board due to SBBC group failure.
  

Note that the word converter is misspelled in the symptom string, and that there is also an extra space between the words timed and out.

The same issue has been witnessed on Serengeti and Starcat.

For Serengeti, the messages look like the following:

Jun 17 13:17:21 sf6800-sc0 Platform.SC: [ID 268649 local0.error]
/partition0/domain1/SB4: RepeaterHpu.prepare: sun.serengeti.HpuFailedException:
/partition0/domain1/SB4/bbcGroup0/cpuAB: CpuSafariGroup.setPower: 
DC-DC convertor voltage failure. Voltage ramp timed  out after 500 msec. 
Safari Group being powered down
Jun 17 13:17:21 sf6800-sc0 Platform.SC: [ID 163292 local0.error]
/partition0/domain1/SB4: RepeaterHpu.prepare: sun.serengeti.HpuFailedException:
/partition0/domain1/SB4/bbcGroup1/cpuCD: CpuSafariGroup.setPower: 
DC-DC convertor voltage failure. Voltage ramp timed  out after 500 msec. 
Safari Group being powered down

Jun 17 13:17:21 sf6800-sc0 Domain-B.SC: [ID 139020 local0.error] 
sun.serengeti.HpuFailedException: /partition0/domain1/SB4: 
unable to prepare board due to SBBC group failure.
Jun 17 13:17:21 sf6800-sc0 Domain-B.SC: [ID 610448 local0.warning] Excluded unusable,
unlicensed, failed or disabled board: /N0/SB4

Changes

Cause

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