Sun ZFS Storage Appliance: Workaround Method (and Script) for Issues With AK-2011.1.4.0, AK-2011.1.4.1, AK-2011.1.4.2 to Prevent Gen 4 SSDs From Failing Due To Exceeding Endurance Threshold (Doc ID 1595313.1)

Last updated on MAY 15, 2015

Applies to:

SPARC SuperCluster T4-4 - Version All Versions and later
Sun ZFS Storage 7120 - Version All Versions and later
Exalogic Elastic Cloud X3-2 Eighth Rack
Sun ZFS Storage 7320 - Version All Versions and later
Sun ZFS Storage 7420 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

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In certain versions of AK Storage Software, the Gen 4 Logzilla(TM) Solid State drives (Oracle PN: 7045627, Model number:Z16IZF2EUSUN73G) can have increased writes to the SSDs, eventually causing them to fail with a SMART trip for exceeding the endurance threshold. The drive will fail with a SMART trip, 0x80 with additional sense key 0x4c for exceeding the endurance threshold.

This document outlines the "Appliance workflow" workaround that makes the necessary changes (disables the Sync Cache on the SSD) on the fly and will remain persistent.

Note: See Sun Alert <Document:1596246.1> for complete information regarding this issue and the recommended resolution.

Changes

The workaround applies to the following AK versions which are affected by this issue:

Release NameDate ReleasedVersion String
2011.1.4.2 11/9/2012 ak-2011.04.24.4.2
2011.1.4.1 Jan 2013 ak-2011.04.24.4.1,1-1.26
2011.1.4.0 8/14/2012 ak-2011.04.24.4.0

for the following platforms:

The Gen 4 SSD model number can be determined from the display in the BUI:

Cause

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