Sun Microsystems 3900, 6900 Suspending the I/O, Sun Proprietary/Confidential Internal Use Only

2.Using the Storage Automated Diagnostic Environment GUI Topology, determine which virtualization engine is in the path you need to disable.

3.Use the worldwide name (WWN) of the virtualization engine that is in the unconfigure command, as follows:

#cfgadm -c unconfigure c2::2b000060220041f4

#cfgadm -al

Ap_Id	Type	Receptacle	Occupant	Condition
c0	scsi-bus	connected	configured	unknown
c0::dsk/c0t0d0	disk	connected	configured	unknown
c0::dsk/c0t1d0	disk	connected	configured	unknown
c1	scsi-bus	connected	configured	unknown
c1::dsk/c1t6d0	CD-ROM	connected	configured	unknown
c2	fc-fabric	connected	unconfigured	unknown
c2::210100e08b23fa25	unknown	connected	unconfigured	unknown
c2::2b000060220041f4	disk	connected	unconfigured	unknown
c3	fc-fabric	connected	configured	unknown
c3::210100e08b230926	unknown	connected	unconfigured	unknown
c3::2b000060220041f9	disk	connected	configured	unknown
c4	fc-private	connected	unconfigured	unknown
c5	fc	connected	unconfigured	unknown

4.Verify that the I/O has halted.

Disabling the path halts the I/O only up to the A3 to B3 link (see FIGURE 5-8). I/O continues to move over the T1 and T2 data paths, as well as the A4 to B4 links to the Sun StorEdge T3+ array.

Suspending the I/O

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

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

■Manually pull the link from the Sun StorEdge T3+ array to the switch and wait for a Sun StorEdge T3+ array logical unit number (LUN) failover.

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

■After the testing and any FRU replacement are finished, return the Controller state back to the default by using virtualization engine failback. Refer to “To Failback the Virtualization Engine” on page 120.

18 Sun StorEdge 3900 and 6900 2.0 Series Troubleshooting Guide • March 2003

Sun Proprietary/Confidential: Internal Use Only