Because SAN Volume Controller version 5.1 or later also provides
iSCSI protocol, the Volume Shadow Copy Service and Virtual Disk Service
support both the FC and iSCSI protocols for snapshots, starting from
version 4.2. The VSS configuration tool provides an option for choosing
the protocol to use if more than one protocol is available. You can
choose auto, FC, or iSCSI.
For example: Figure 1. VSS configuration tool
Note: If you choose auto, the Volume Shadow Copy Service and Virtual
Disk Service select the protocol to use.
