HP 3PAR Remote Copy Software - Manual (Page 36)

2.20 Remote Copy Operation
Remote Copy User’s Guide InForm OS Version 2.3.1
storage servers in the proposed configuration are separated by a large distance and have been
placed on different IP subnets. If the storage servers are on different subnets, each storage
server must be connected to a gateway router or switch on that subnet and there must be an
IP cloud between their gateways.
2.8.2 Fibre Channel Networks
Remote Copy over Fibre Channel is supported on storage servers communicating over Fibre
Channel Storage Area Networks (FC SAN). Each storage server should have a pair of Host Bus
Adapters (HBAs) installed. This HBA pair must be dedicated to Remote Copy. The HBA pair is
required for load sharing and fault tolerance. The HBAs in each storage server connect these
systems through FC SAN using Fibre Channel cable connections.
Before configuring Remote Copy, you need a good understanding of the FC SAN that will be
used to connect the storage servers. They must be configured to be in the same FC SAN and
Zone.
2.8.3 Fibre Channel over IP Networks
Remote Copy over Fibre Channel is also supported on storage servers communicating over an
IP network. In this type of setup, the primary and backup InServ Storage Servers use Fibre
Channel connections, which pass through routers to cross an IP network.
2.9 Remote Copy Operation
As described previously in Remote Copy Volume Groups on page 2.6, in order to maintain
write consistency, Remote Copy operations are performed on groups of virtual volumes called
Remote Copy volume groups.
Another use of volume groups with Remote Copy is to simplify administration. For example,
the number of commands that need to be executed can be reduced by using volume groups. A
single start / stop / setrcopygroup command applies to all volumes in a group. This can
reduce the number of CLI commands that need to be run to configure and operate Remote
Copy. Even when the volumes do not need write consistency, if the volumes are added to a
single group, Remote Copy treats them as related volumes.
NOTE: RCFC over IP networks is only allowed for Remote Copy in asynchronous
periodic mode.