Fujitsu SPARC M12-1
 
Fujitsu SPARC M12-2
 
Fujitsu SPARC M12-2S
 

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In this Document

Purpose

Details

References

Applies to:

Purpose

Provide additional information for message ID: M12-i2c.device_cmu

Fujitsu fault codes:

01920202, 01920205

Details

Type

Hardware Fault

   i2c.device_cmu

Severity

Major

Description

Fault due to a I2C write failure to a specific chip.

The I2C write operation is performed when configuring the chips. I2C is used to access CPU chips or PCI express switch chips on MBU (for M12-1 servers) or CMUL (for M12-2/M12-2S servers).

Automated Response

If this fault takes place while the platform is powering up or while a FRU is powering up, then the FRU with the chip will not be configured into the system.

Otherwise, no immediate action is taken. The platform administrator should schedule a service action.

Impact

If the chip being accessed is a CPU chip:

The CPU chip is deconfigured when the PPAR using the CPU chip reboots.

When the chip being accessed is a PCI express switch chip, this chip is deconfigured.

Indicted Hardware

If the chip being accessed is a CPU chip:

For M12-1 systems, the MBU is marked for replacement.

For M12-2/M12-2S systems: the CMUU or CMUL, where the suspicious CPU chip is mounted, is marked for replacement. If the first suspect is CMUU, there is a small chance that MBC on CMUL is faulty.

If the chip being accessed is a PCI express switch chip:

For M12-1 servers, MBU is marked for replacement.

For M12-2/M12-2S servers, CMUL is marked for replacement.

Suggested Action for System Administrator

The recommended service action for this event is to schedule replacement of the affected component(s) at the earliest possible convenience. Although the hardware may be functioning, it is not intended nor recommended that the faulted component(s) remain in the system for a prolonged period of time.

Refer to the following document for the latest procedures for displaying event content in preparation for submitting a service request and applying any post-repair actions that may be required.

PSH Procedural Article for Fujitsu M10 Diagnosis (Doc ID 1525156.1)

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