User`s manual

C-10
SC836 Chassis Manual
The SAS-836EL2 backplane has two expanders which allow effective failover and
recovery.
C-12 Failover
Single Host Bus Adapter
In a single host bus conguration, the
backplane connects to one HBA.
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
SAS HBA
Port A
Expander 1
Port B
Expander 2
Figure C-9: Single HBA
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
SAS HBA
Port A
Expander 1
Port B
Expander 2
Single Host Bus Adapter
Failover
If the expander or data path in Port A
fails, the system automatically switches
to Port B.
Figure C-10: Single HBA Failover