Configuring Volume Shadow Copy Service using iSCSI

You can use iSCSI when you configure the VSS provider in a physical environment.

1. Connect to the storage using CIMOM.
2. Create the free storage pool and reserved storage pool for VSS. Define the virtual hosts VSS_FREE_POOL and VSS_RESERVED_POOL on the storage system with the following sample WWPN: 5000000000000000 and 5000000000000001.

   Note: VSS_FREE_POOL and VSS_RESERVED_POOL must be FC Port type hosts. iSCSI and SAS type hosts are not supported.

3. Issue the following commands to set the sample WWPN of the free storage pool and the reserved storage pool:
   • ibmvcfg set vssFreeInitiator
   • ibmvcfg set vssReservedInitiator
4. Map the source volumes to the physical host by iSCSI.
5. Map the target volumes to the free storage pool.

   Note: Each target volume must be exactly the same size as the corresponding source volume. After the configuration is set (see step 3), the service must be restarted using the following commands in order for the configuration to take effect: net stop vss net stop ibmvss The above commands will stop both VSS VDS and the IBM VSS HW Provider. Both services will start automatically in later use.