Infrequent SAS Disconnected command timeouts Might Be Displayed (16562940)

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 message indicates 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.

Workaround: Update the SAS controller firmware:

1. Obtain the SAS controller patch for this server module.

   SPARC T5-2 server module SAS patch ID: 16801158

   See Obtain Patches.

2. Follow the instructions in the patch README file.

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   Note - To update the SAS controller firmware, you must first obtain and install the Oracle Hardware Management Pack (HMP) software. Instructions in the README file describe how to obtain and install HMP.

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