Unable to write SSC050 device Failures During Boot/Shutdown (OBDIAG Failures)

Asset ID:	1-72-1377558.1
Update Date:	2018-02-15
Keywords:

Solution Type Problem Resolution Sure

Solution 1377558.1 : Unable to write SSC050 device Failures During Boot/Shutdown (OBDIAG Failures)

Applies to:

Sun Fire V880 Server - Version Not Applicable and later
Sun Fire V890 Server - Version Not Applicable and later
Sun Fire V880z Visualization Server - Version Not Applicable and later
Information in this document applies to any platform.

Symptoms

The system is getting errors during boot stating it's not able to read the ID from the FCAL disk backplane 0. OpenBoot Diagnostics failed and Unable to write SSC050 device.

Prtdiag will not report status of components properly.

System will fail to boot with error messages.

OBDIAG will fail components such as the I2C ebus component.

Cause

prtdiag example:

========================= Environmental Status =========================

failed in fill_device_array_from_id for PSVC_KEYSWITCH

Property not found

failed in fill_device_array_from_id for FSP_LED

Property not found

failed in fill_device_array_from_id for DISK

Property not found

failed in fill_device_array_from_id for FAN

Property not found

Power Supplies:

Boot messages:

ERROR: Unable to write SSC050 device.
ERROR: Can't access LTC1427-50 device
ERROR: /pci@9,700000/ebus@1/serial@1,400000: Last Trap: Fast Data Access MMU Miss
ERROR: /pci@9,700000/ebus@1/serial@1,400000: Can't access SSC050 device
ERROR: /pci@9,700000/ebus@1/i2c@1,30: Couldn't read ID from FCAL Disk Backplane 0
ERROR: Can't open Disk Backplane 0 FRUPROM
ERROR: /pci@9,700000/ebus@1/i2c@1,30: Couldn't read ID from FCAL Disk Backplane 0
ERROR: /pci@9,700000/ebus@1/i2c@1,30: Cannot initialize SSC050 fan speed counter at bus 5, addr 80 port P2.5
ERROR: /pci@9,700000/ebus@1/i2c@1,30: Cannot initialize SSC050 fan speed counter at bus 5, addr 80 port P2.7
ERROR: /pci@9,700000/ebus@1/i2c@1,30: Cannot initialize SSC050 fan speed counter at bus 5, addr 82 port P2.5
Error 7

OBDIAG failures:

Running diagnostic script obdiag/normal

Testing /pci@8,600000/network@1
Testing /pci@8,600000/SUNW,qlc@2
Testing /pci@9,700000/ebus@1/i2c@1,2e
Testing /pci@9,700000/ebus@1/i2c@1,30 <------------------- Ebus I2C controller located on the IO board

ERROR : Read from MAX1617 read external temp register failed.
DEVICE : /pci@9,700000/ebus@1/i2c@1,30/temperature@0,32
SUBTEST : selftest
CALLERS : catch
MACHINE : Sun Fire 880
SERIAL# : 54830358
DATE : 11/15/2011 16:42:26 GMT
CONTROLS: diag-level=min test-args=
Error: /pci@9,700000/ebus@1/i2c@1,30 selftest failed, return code = 1
ERROR: /pci@9,700000/ebus@1/i2c@1,30: Couldn't read ID from FCAL Disk Backplane 0
ERROR: Can't open Disk Backplane 0 FRUPROM
ERROR: OpenBoot Diagnostics failed.
ERROR: OpenBoot Diagnostics failed
WARNING: Device /pci@9,700000/ebus@1/i2c@1,30 already marked with 'status' == fail
Resetting ...

Solution

Replace the IO board. PN 501-6524 or PN 501-5142

References

<NOTE:1008863.1> - Troubleshooting problems where prtdiag shows limited information or no information
<NOTE:1018834.1> - Sun Fire[TM] Server: Advanced DPM(Daktari Personality Module) Troubleshooting Techniques
<NOTE:1383378.1> - Sun Fire[TM] Servers (V280R, V480, V490, V880, V890):OBDiag Troubleshooting

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