Sun Microsystems Sun StorEdge T3 - Manual (Page 41)

Chapter 4 Configuration Examples 29
Single Host With Two Controller Units
Configured as a Partner Group
FIGURE 4-2 shows one application host connected through FC-AL cables to one array
partner group, which consists of two Sun StorEdge T3+ arrays. The Ethernet
connection from the master controller unit is on a public or separate network and
requires an IP address for the partner group. In the event of a failover, the alternate
master controller unit will use the master controller unit’s IP address and MAC
address.
FIGURE 4-2 Single Host With Two Controller Units Configured as a Partner Group
This configuration is a recommended enterprise configuration for RAS functionality
because there is no single point of failure. This configuration supports Dynamic
Multi-Pathing (DMP) by VERITAS Volume Manager, the Alternate Pathing (AP)
software in the Solaris operating environment, or Sun StorEdge Traffic Manager
software for failover only.
The following three global parameters must be set on the master controller unit, as
follows:
■ mp_support = rw or mpxio
■ cache mode = auto
■ cache mirroring = auto
For information on setting these parameters, refer to the Sun StorEdge T3 and T3+
Array Administrator’s Guide.
Application host
FC-AL connection
Interconnect
cables
LAN
Ethernet port
Ethernet
connection
Management host
HBAs
Ethernet
connection
Master
Alternate
master
controller
controller
unit
unit