D-11
Appendix D: BPN-SAS-846EL Backplane Specifications
PRI_FLASH1
J2
J2
J1
Port B
Secondary Ports
Expander 2
From HBA or higher
backplane
To Lower Backplane in
cascaded system
To Lower Backplane in
cascaded system
Port A
Primary Ports
Expander 1
From HBA or higher
backplane
J0
J1
J0
D-8 Single and Dual Port Expanders
Single Ports
SAS-846EL1 backplanes have a single-port expander that access all 24 drives and
supports cascading.
Dual Ports
SAS-846EL2 backplanes have dual-port expanders that access all 24 drives. These
dual-port expanders support cascading, failover, and recovery.
Dual Port and Cascading Configurations
Figure D-4: SAS-846EL2 Dual Port Configuration
Figure D-5: SAS-846EL1 Single Port Configuration
PRI_FLASH1
J2
J1
To Lower Backplane in
cascaded system
Port A
Primary Ports
Expander 1
From HBA or higher
backplane
J0
