User`s manual

D-11
Appendix D: SAS-846EL Backplane Specications
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-10 Single and Dual Port Expanders
Single Ports
SAS-846EL1 backplanes have a single-port expander that access all twenty-four
drives and supports cascading.
Dual Ports
SAS-846EL2 backplanes have dual-port expanders that access all twenty-four
drives. These dual-port expanders support cascading, failover, and multipath.
D-9 Dual Port and Cascading Congurations
The following section contains cascading congurations for the SC846EL1 and
SC846EL2 backplanes.
Figure D-4: SAS-846EL2 Dual Port Conguration
Figure D-5: SAS-846EL1 Single Port Conguration
PRI_FLASH1
J2
J1
To lower backplane in
cascaded system
Port A
Primary Ports
Expander 1
From HBA or higher
backplane
J0