Dual-Domain Sas: Servers In Two-Node Cluster - HP 381513-B21 - Smart Array P800 Controller RAID Technology Brief

Dual-domain SAS: servers in two-node cluster

This configuration, which is also known as a high availability (HA) cluster, at least one server must
have access to the storage network. The cluster interconnect provides redundancy in the event of host
bus adapter (HBA) or cable failure, as shown in Figure 4. Dual-domain SAS requires "active/active"
configurations. The "active/active" configurations permit both controllers to process I/Os, and either
controller can act as a standby. To use the dual-ports for redundant pathways, all drives must be SAS.
Figure 4 Multi-Path, 2-Node, HA cluster configuration
.
Server
Server
HBA
HBA
Cluster
Cluster
interconnect
interconnect
Server
Server
HBA
HBA
4 4
IO Module IO Module
IO Module IO Module
Expander Expander
Expander Expander
4 4 4 4
IO Module IO Module
IO Module IO Module
4 4
Expander Expander
Expander Expander
SAS drive
SAS drive
SAS drive
SAS drive
SAS drive
SAS drive
JBOD
JBOD
6