E-10
SC847 Chassis Manual
The SAS-826EL2 Backplane has two expanders which allow effective failover and
recovery.
E-10 Failover
Single Host Bus Adapter
In a single host bus configuration, the
backplane connects to one Host Bus
Adapter (HBA).
Single Host Bus Adapter Failover
If the expander or data path in Port
A fails, the system will automatically
fail over to Port B.
Dual Host Bus Adapter
In a dual host bus configuration, the
backplane connects to two host bus
adapters.
Dual Host Bus Adapter Failover
If the expander or data path in Port
A fails, the system will automatically
fail over to Port B. This maintains a
full connection to all drives.
SAS HBA
Port A
Expander 1
Port B
Expander 2
SAS HBA
Port A
Expander 1
Port B
Expander 2
SAS HBA
Port A
Expander 1
Port B
Expander 2
SAS HBA
SAS HBA
Port A
Expander 1
Port B
Expander 2
SAS HBA
Summary of Contents for SC847 Series
Page 12: ...SC847 Chassis Manual 1 4 Notes...
Page 32: ...2 20 SC847 Chassis Manual Notes...
Page 53: ...5 15 Chapter 5 Chassis Setup and Maintenance Figure 5 14 Placing the System Fan...
Page 76: ...SC847 Chassis Manual B 2 Notes...
Page 86: ...C 10 SC847 Chassis Manual Notes...
Page 96: ...D 10 SC847 Chassis Manual Notes...
Page 118: ...E 22 SC847 Chassis Manual Notes...
Page 187: ...H 23 Appendix H SAS2 846EL Backplane Specifications Notes...