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120 Sun StorEdge 3900 and 6900 Series 2.0 Troubleshooting Guide • March 2003
Sun Proprietary/Confidential: Internal Use Only
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To Failback the Virtualization Engine
In the event of a Sun StorEdge T3+ array LUN failover, the virtualization engine will
route all I/O through the failover port on the Sun StorEdge T3+ array. After you
isolate and check the cause of the failover, the virtualization engine continues to
send I/O through the failover path. To restore the I/O to the primary path and fail
the LUN back to its original controller, use the following procedure:
1. Verify that the T3+ array active path needs to be restored by viewing a live
snapshot of the virtualization engine map, as shown in “Viewing the
Virtualization Engine Map” on page 118.
If there has been a failover, the Multipath Drive Summary will show the same Sun
StorEdge T3+ array active path WWN for all LUNs associated with one Sun
StorEdge T3+ array, as shown in
CODE EXAMPLE 9-3.
CODE EXAMPLE 9-3 Multipath Drive Summary
2. If the Sun StorEdge T3+ array LUNS have failed over, run the command found in
CODE EXAMPLE 9-5 for that specific Sun StorEdge T3+ array.
Note – The Sun StorEdge T3+ array name is the same as the disk pool name—but
with the last digit (equal to the Sun StorEdge T3+ array LUN number) removed, as
shown in
CODE EXAMPLE 9-4.
For example, the LUNs in disk pools t3b00 and t3b01 are named t3b0 on the Sun
StorEdge T3+ array device.
CODE EXAMPLE 9-4 Sun StorEdge T3+ array and Disk Pool Name
Disk pool MP Drive T3+ Active Controller Serial
Target Path WWN Number
-------------------------------------------------------
t3b00 T49152 50020F230000725B 60020F2000006DFA
t3b01 T49153 50020F230000725B 60020F2000006DFA
# /opt/SUWNsecfg/bin/failbackt3path -n t3b0