User`s manual

D-12
SC846 Chassis Manual
Single Host Bus Adapter
In a single host bus conguration, the
backplane connects to one Host Bus
Adapter (HBA).
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
SAS HBA
Port A
Expander 1
Port B
Expander 2
Figure D-6: Single HBA
The SAS-846EL2 backplane has two expanders which allow effective failover.
D-11 Failover
PRI_J0
PRI_J1
PRI_J2
SEC_J0 SEC_J1
SEC_J2
J17
WWN
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 D-7: Single HBA Failover