Remote Path Configurations; Fibre Channel - Hitachi AMS 2000 User Manual

Remote path configurations

TCE supports both Fibre Channel and iSCSI connections for the remote
path.
• Two remote paths must be set up between, one per controller. This
ensures that an alternate path is available in the event of link failure
during copy operations.
• Paths can be configured from:
- Local controller 0 to remote controller 0 or 1
- Local controller 1 to remote controller 0 or 1
• Paths can connect a port A with a port B, and so on. Hitachi
recommends making connections between the same controller/port,
such as port 0B to 0B, and 1 B to 1 B, for simplicity. Ports can be used
for both host I/O and replication data.
The following sections describe supported Fibre Channel and iSCSI path
configurations. Recommendations and restrictions are included.

Fibre channel

The Fibre Channel remote data path can be set up in the following
configurations:
• Direct connection
• Single Fibre Channel switch and network connection
• Double FC switch and network connection
• Wavelength Division Multiplexing (WDM) and dark fibre extender
The array supports direct or switch connection only. Hub connections are
not supported.
General recommendations
The following is recommended for all supported configurations:
• TCE requires one path between the host and local array. However, two
paths are recommended; the second path can be used in the event of a
path failure.
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
Plan and design — remote path
3–5