HP P6000 Continuous Access Implementation Guide (T3680-96431, August 2012)

Figure 8 Single-switch configuration
4. Hosts1. LAN connection
5. Dual-controller arrays2. Switch
3. Management server
In this example, two hosts might be clustered together using a supported cluster technology for the
operating system. The third host would be a single server running the same operating system as
the clustered hosts, and therefore available as a backup to the cluster. In another example, the
third host could have a different operating system and be a standalone server used for training on
storage failover.
Single-HBA configuration
A host containing a single HBA can be attached to any of the following configurations:
• Basic HP P6000 Continuous Access and optional links
• Single fabric
• Single switch
This option allows the use of hosts that support only one HBA. Availability is reduced due to the
SPOF in connecting the server to the array.
Advanced configurations
The following configurations use separate controller host ports for host I/O and replication I/O.
This enhances security and reduces contention between host I/O and replication I/O on a single
controller host port. Any HP P6000 Continuous Access configuration using FC-to-IP gateways to
communicate with the destination site should adhere to this recommendation.
Five-fabric configuration
The five-fabric solution shown in Figure 9 (page 30) consists of one fabric (8) that is dedicated to
replication and four fabrics (blue and gold at each site) that are dedicated to I/O between hosts
and arrays. Figure 10 (page 31) shows the same configuration using FC-to-IP for the replication
fabric.
In the five-fabric configuration, blue and gold fabrics (6 and 7) are dedicated to host I/O. A
separate black fabric consisting of the switches (8) and the single intersite link (9) pass all the
replication I/O. The dedicated switch (8) combines the data into one intersite link.
Advanced configurations 29