Figure 110 Multipath Connection (When a SAN Connection Is Used for Enhanced Performance)
Server
HBA HBA HBA
Server
HBA
ETERNUS DX
Port
CM#0
Port
Port
CA#0 CA
#1 CA#0 CA#1
CM#1
PortPort
Port
Port
Port
Caution
• When configuring multipathing for reliability, make sure to configure a redundant connection for
the controllers of the
ETERNUS DX. Configure paths to connect to different controllers (CM#0 and
CM#1). Combinations of host interface numbers (CA#0 and CA#1) in controllers do not need to be
taken into consideration.
• Paths from a single server should be separately connected to a different host interface in case of
host interface failure.
■
Cluster Configuration
When servers are duplicated and connected using a cluster configuration to share a single
ETERNUS DX among
multiple servers, cluster control software is required.
■
Storage Cluster Configuration
An ETERNUS DX is duplicated and connected in a cluster configuration by using Storage Cluster.
The connection interface is FC or iSCSI. In addition, only the switch connection topology is supported. Direct
connections are not supported.
For more details on Storage Cluster, refer to "Storage Cluster" (page 142).
5. Connection Configuration
SAN Connection
215 Design Guide
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