Infortrend EonStor GSa 5000 Series Hardware Manual page 43

Configuration rules
To connect the SAS interfaces across storage and expansion systems, you must take note of the
following:
• Fault-tolerant links in a dual-controller combination
Corresponding to the dual-port interfaces of the SAS drives, two physical links are available per
disk drive, routed across the backplane board, then to a SAS expander, and interfaced via a 4x
wide external SAS port.
• With data paths via separate SAS domains
Access to disk drives can be continued in the event of a failure from a cable link or SAS expansion
controller.
Number
11
11
11
11
11
11
11
EonStor GSa 5000 Series Hardware Manual
Description
RAID controller A
RAID controller B
Expansion system controller A
Expansion system controller B
Dual-port SAS drives
Expander
To another expansion system
2-21