Oracle ZFS Storage Appliance: Oracle Linux/ Redhat Enterprise Linux - Client I/O error during FC LUN Failover (Doc ID 1638517.1)

Last updated on SEPTEMBER 18, 2015

Applies to:

Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
Sun Storage 7410 Unified Storage System - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7320 - Version All Versions to All Versions [Release All Releases]
Sun Storage 7310 Unified Storage System - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)

Symptoms

Appliance version: 7420
Appliance SW version: 2013.06.05.1.1,1-1.2
Client OS type/version: Redhat 6.2

When testing takeover and failback on a ZFS appliance 7420 cluster there is a I/O error on the Redhat client logs for a short period.

This also occurs on the reboot of one of the heads in the cluster.

The SAN switch connection has four FC paths to the attached ZFS appliance and the clients are using the Redhat 6.2 multipath daemon.  In all scenario, two paths remain active when writing data for 30-40 seconds

The two configured FC LUN:

 

Cause

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