HP StorageWorks SAN Virtualization Services Platform administrator guide (5697-8056, March 2009)

NOTE:
At this time, the only supported multipath policy is Most Recently Used (default).
VMware storage administration best practices
Rescan SAN operations
HP recommends that whenever a change is made to the front-side zone a “Rescan SAN” operation
is performed on all ESX servers. This is particularly important after recovery of a path failure or when
an DPM is replaced. If “Rescan SAN” is not performed, the ESX server may not know about new
available paths and will operate in a single path mode.
The VMware VI GUI or vmkmultipath command should be used to verify that all expected paths
have been discovered and are marked as available.
Resizing VSM virtual disks
VSM virtual disks can be extended with no downtime. To resize the virtual disks:
1. From the VSM GUI, choose Entity > Virtual Disk, and select the virtual disk you would like to
expand. Right-click on the virtual disk name, and select Manage > Expand.
2. Follow the process in the HP StorageWorks SAN Virtualization Service Platform Manager user
guide on how to expand a VSM virtual disk.
3. From the VMware ESX server, select the Configuration tab and click Storage Adapter. Choose
the QLA/LP HBA and select Rescan. Verify that you can see the LUN with the new (extended)
size.
4. Repeat these steps for all ESX servers that use this shared LUN storage (like in a VMware cluster).
5. Follow the VMware procedures to extend the DATASTORE.
Storage VMotion
Storage VMotion is a new feature for VMware ESX V3.5 (only) and is fully supported with the current
DPM/VSM versions (see the Deployment Overview section for specific version number). See
“Deployment overview” on page 97 for supported version.
• Use the VMware VMotion CLI utility to move virtual machines between DATASTORES. For inform-
ation, go to: http://www.vmware.com/go/remotecli.
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