Qlogic Online Data Migration Using the iSR6200 in Cluster Configurations (ISR651405-00 A, December 2011)

5 – Inserting the Router into a VMware Cluster
ISR651405-00 A 7
4. Extend the VG with the router paths, so that the VG has all direct paths and router paths.
5. Issue the vgdisplay -v <volume_group_name> command, and then verify that the alternate
links for router paths have been successfully created.
6. Issue the vgreduce command to remove, one at a time, the PVs from the VGs in the direct paths, so
that only the router paths are available in the VG.
7. Use the array management utility to remove the LUN presentation to the initiator.
4.2
HP-UX 11.31
1. Ensure that the original configuration has a VG created using a multipath disk. (Issue the scsimgr
lun_map command to view the multipath disk for multiple instances of a LUN.)
2. Start the I/O, and then while the I/O is running, ensure that the path status is either active or standby.
3. Add router paths to the host, and then issue the ioscan command to check the availability of the
paths.
4. Issue the scsimgr lun_map command to verify that the new router paths to the LUN are discovered
correctly and showing an “Active” path status.
5. Log in to the array management utility and remove LUN presentation to the host server.
6. Verify that I/O completely fails over to the router path without errors.
5
Inserting the Router into a VMware Cluster
Because VMware clusters do not implement any SCSI persistent reservations for the shared storage
resources that the clusters manage, you need not change specific settings when inserting the router in the
data path. To insert the iSR6200 in the data path for the ESX server data path, use the procedures
documented in Appendix A of the Data Migration Service for iSR6200 User’s Guide. In addition, you can
visit the VMware Web site, www.vmware.com
and search for “cluster configurations.”
The iSR6200 supports VMware clusters on ESX 4.x platforms, any array model, native MPIO, and
router insertion method 2.
NOTE:
 I/O should fall through the router path and continue without any issues.
 Some I/O may start flowing immediately through the router path after Step 4, when the PVs
belonging to the router paths are added to the VG.
 In some cases, I/O will flow through the router path only when the primary link belonging to the
direct path has been removed in Step 5.
NOTE:
The native multipath may load-balance the I/O on a direct path, and also a router path for I/O on an
active controller, because this controller is now available directly, as well as through the router.