Advanced Copy can be performed for a TFOV using volumes that are not subject to Storage Cluster.
Advanced Copy between TFOVs is provided as the Storage Cluster Continuous Copy function. Refer to "3.12 Storage Cluster Continuous Copy Function" for the Storage Cluster Continuous Copy function.
A TFOV is a volume that is subject to Storage Cluster. The Storage Cluster function transparently performs switching from components of an operation system to components of a standby system via an external operating environment.
Refer to "Storage Cluster Function" in the Storage Cruiser Operation Guide for details about the Storage Cluster function.
System Configuration
The system configuration necessary for Advanced Copy of a TFOV is described here.
When using the Copy command via SAN, assign one logical volume of the ETERNUS Disk storage system that is subject to Storage Cluster to the CCM Server as an access volume.
Note
When using the Copy command via SAN, and performing a backup of the ETERNUS Disk storage system on the secondary storage side, an access volume must be created for each ETERNUS Disk storage system.
A TFOV cannot be set as an access volume.
Advanced Copy can be executed from a TFOV that belongs to a TFO group of an Active-Active configuration to a non-TFOV only when operated with the Copy command via LAN.
When Performing Intra-box Copy (OPC/QuickOPC/SnapOPC+/EC)
Figure 3.18 System Configuration for Performing Intra-box Copy (OPC/QuickOPC/SnapOPC+/EC)
When Performing Inter-box Copy (REC)
Figure 3.19 System Configuration for Performing Inter-box Copy (REC)
Point
When using the Copy command via SAN, the access volume needs storage device on either the copy source or copy destination.
An Inter-box copy from a TFOV to a non-TFOV is executed with a TFOV on either the Primary Storage or Secondary Storage as the copy source, and an ETERNUS Disk storage system non-TFOV that is different from the Primary Storage and Secondary Storage as the copy destination.
An Inter-box copy can be performed from either one of or both the Primary Storage and Secondary Storage, but we recommend performing an inter-box copy from the Primary Storage. Performing an inter-box copy from both the Primary Storage and Secondary Storage impacts bandwidth between the RECs. Design the operation in line with the objective and usage.
