SAS Disk Becomes Inaccessible After a Reset

Asset ID:	1-72-2140061.1
Update Date:	2016-07-21
Keywords:

Solution Type Problem Resolution Sure

Solution 2140061.1 : SAS Disk Becomes Inaccessible After a Reset

Applies to:

Fujitsu M10-4S - Version All Versions and later
Fujitsu M10-1 - Version All Versions and later
Fujitsu M10-4 - Version All Versions and later
Oracle Solaris on SPARC (64-bit)

Symptoms

In rare cases, if a 12Gbps SAS PCIe Card, that uses the lsc driver, experiences an abnormal firmware operation (IOC_STATE_FAULT response or no response to the lsc driver) unexpectedly, a SAS Chip Reset will be executed by the lsc driver, causing the disk(s) connected to the 12Gbps SAS PCIe Card to no longer be recognized correctly. This may result in access errors to the disk(s) or data corruption on the disk(s).

This problem does not occur with the 6Gbps SAS driver (mpt_sas).

Cause

This is caused by the lsc driver's mishandling of devhandle changes after a chip reset.

Solution

This problem has been fixed by Oracle Solaris 11.3 SRU 10.5 (Oracle Solaris 11.3.10.5.0). When the 12Gbps SAS PCIe Card is used, apply the SRU.

Bug ID 22864600: LSC DRIVER CANNOT RECOGNIZE DISK AFTER SAS CHIP RESET BY IOC_STATE_FAULT

References

<BUG:22864600> - LSC DRIVER CANNOT RECOGNIZE DISK AFTER SAS CHIP RESET BY IOC_STATE_FAULT
<BUG:22987878> - BACKPORT 22864600 TO 11.3-SRU - LSC DRIVER CANNOT RECOGNIZE DISK AFTER SAS CHIP

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