C-18
Cisco UCS C24 Server Installation and Service Guide
OL-26647-01
Appendix C RAID Controller Considerations
RAID Controller Cabling
Cisco UCS C24 Server RAID Cabling Instructions
This section contains the following topics:
• Backplane and Expander Options, page C-18
• Small Form Factor 24-Drive Backplane With Expander Cabling, page C-18
• Small Form Factor 16-Drive Backplane (No Expander) Cabling, page C-19
• Large Form Factor 12-Drive Backplane With Expander Cabling, page C-20

Backplane and Expander Options

The server is orderable in three different versions, each with one of three different front panel/backplane
configurations:
• Cisco UCS C24 (small form-factor (SFF) drives, with 24-drive backplane and expander).
Holds up to twenty-four 2.5-inch hard drives or solid state drives.
• Cisco UCS C24 (small form-factor (SFF) drives, with 16-drive backplane, no expander).
Holds up to sixteen 2.5-inch hard drives or solid state drives.
• Cisco UCS C240 (large form-factor (LFF) drives, with 12-drive backplane and expander).
Holds up to twelve 3.5-inch hard drives.
Note The SAS expander is required for the SFF 24-drive option and the LFF 12-drive option.
The SFF 16-drive option does not use the SAS expander.

Small Form Factor 24-Drive Backplane With Expander Cabling

The cable connections required for each type of controller are as follows:
• LSI MegaRAID SAS 9220-8i or 9240-8i PCIe Card (Cable UCSC-CABLE-A6), page C-18
• LSI MegaRAID SAS 9265CV-8i PCIe Card (Cable UCSC-CABLE-A6), page C-18

LSI MegaRAID SAS 9220-8i or 9240-8i PCIe Card (Cable UCSC-CABLE-A6)

These options can control up to 16 drives.
The required UCSC-CABLE-A6 cable kit has two cables. Cable 1 controls drives 1–8 and cable 2
controls drives 9–16.
Step 1 Connect SAS cable 1 from card connector SAS 0 to the Port0 connector on the expander.
Step 2 Connect SAS cable 2 from card connector SAS 1 on the card to the Port1 connector on the expander.

LSI MegaRAID SAS 9265CV-8i PCIe Card (Cable UCSC-CABLE-A6)

This option can control up to 24 drives.
The required UCSC-CABLE-A6 cable kit has two cables. Cable 1 controls drives 1–12 and cable 2
controls drives 13–24.