Infortrend DS 3024UB - Page 65

2-38 Chapter 2: Hardware installation
Conguration rules
To connect the SAS interfaces across SAN 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 Description
11
RAID controller A
11
RAID controller B
11
Expansion system controller A
11
Expansion system controller B
11
Dual-port SAS drives
11
Expander
11
To another expansion system