You should use WWPN to connect the storage and transaction server via the FC interface. Since the virtual disk may consist of multiple storages, you cannot use the WWPN that is actually retained by the CA.
Therefore, you can use the corresponding virtual target for such a WWPN to connect the virtual disk and transaction server under the VSC system.
The virtual target is information independent of the WWPN in storage. Therefore, it does not affect the transaction server once it is connected to the transaction server with a virtual target, even when new storage is added. As long as you do not delete the virtual target, you can use the same virtual target to continue virtual disk operation.
You can use the virtual target attached to a virtual enclosure as an access path to the virtual disk.
Although the virtual target is actually a WWPN, you need not specify a complex number for the WWPN when creating a virtual target. You may specify any name that is easy to manage. VSC automatically generates and manages FC protocol-based WWPNs with the virtual target names.
The WWPN assigned from VSC to the virtual target name becomes necessary information when the transaction server connects to a virtual disk.
Information
When creating virtual targets, you need the names of the virtual enclosure (for registering virtual targets) and the virtualization switch for connecting the virtual targets and access path. The name of the virtualization switch that you specify at this time will be the same as that already registered to the virtual enclosure.
Note
Since a virtual target is not allowed to have multiple access paths, the virtualization switch specified can only have one name. Note that when you use a multi-path configuration for the virtual disk, you need multiple virtual targets as well.
Figure 2.5 Relationship between virtual targets and resources
You can delete any virtual target that will no longer be used. However, you cannot delete the virtual target that has an attached virtual disk. Therefore, you must remove all virtual disks from the virtual target before deleting the virtual target.
I_T_L nexus (path to LUN) with respect to one virtual target being 256, if multiple hosts are allocated to one virtual target, the other host could fail in login due to insufficient I_T_L nexus. When using multiple hosts, it is recommended to allocate a virtual target to each host.
