On rare occasions, these warning messages might be displayed on the host console:
WARNING: /pci@300/pci@1/pci@0/pci@4/scsi@0 (mpt_sas0): Disconnected command timeout for Target 9 WARNING: mptsas_ioc_task_management failed try to reset ioc to recovery! WARNING: Target 9 reset for command timeout recovery failed!
The warning messages indicate that the SAS controller (mpt_sas), which is used to access the internal hard and solid state devices, had trouble communicating. As a result, the SAS controller is reset and the I/O command is reissued.
In most cases, the SAS controller successfully reconnects, and the I/O command completes as normal, as indicated by these messages:
mptsas0 Firmware version v14.0.0.0 (?) mptsas0: IOC Operational.
Fix: Update the SAS controller firmware:
Obtain the SAS controller patch for this server.
SPARC T5-8 server SAS patch ID: 16801179
See Obtain Patches.
Follow the instructions in the patch README file.