Sun Microsystems 6900 Series, 3900 Series To Suspend the I/O, To Return the Path to Production

▼To Suspend the I/O

Use one of the following methods to suspend the I/O while the failover occurs:

1.Stop all customer applications that are accessing the Sun StorEdge T3+ array.

2.Manually pull the link from the Sun StorEdge T3+ array to the switch and wait for a Sun StorEdge T3+ array LUN failover.

■After the failover occurs, replace the cable and proceed with testing and FRU isolation.

■After testing and any FRU replacement is finished, return the Controller state back to the default by using virtualization engine failback. Refer to “Virtualization Engine Failback” on page 81.

Note –To confirm that a failover is occurring, open a telnet session to the Sun StorEdge T3+ array and check the output of port listmap.

Another, but slower, method is to run the runsecfg script and verify the virtualization engine maps by polling them against a live system.

Caution –During the failover, SCSI errors will occur on the data host and a brief suspension of I/O will occur.

▼To Return the Path to Production

1.Type cfgadm -c configure device.

#cfgadm -c configure c2::2b000060220041f4

2.Verify that I/O has resumed on all paths.

10 Sun StorEdge 3900 and 6900 Series Troubleshooting Guide • March 2002