C-21
Cisco UCS C240 Server Installation and Service Guide
OL-25761-01
Appendix C RAID Controller Considerations
RAID Controller Cabling
Cisco UCS C240 Server Cabling Instructions
This section contains the following topics:
• Backplane and Expander Options, page C-21
• SFF 24-Drive Backplane With Expander Cabling, page C-21
• SFF 16-Drive Backplane, No Expander, page C-22
• LFF 12-Drive Backplane With Expander, page C-23
Backplane and Expander Options
The server is orderable in three different versions, each with one of three different front panel/backplane
configurations:
• Cisco UCS C240 (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 C240 (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.
Note This server supports up to two PCIe-style RAID controllers. However, do not mix controller types in the
server.
Note The embedded RAID option is available only with the SFF 16-drive backplane. It does not operate
through an expander.
SFF 24-Drive Backplane With Expander Cabling
The cable connections required for each type of controller are as follows:
Mezzanine-Style Card
This option can control up to 16 drives.
The required UCSC-CABLE6 cable kit has two cables. Cable 1 controls drives 1–8 and cable 2 controls
drives 9–16.
1. Connect cable 1 from connector SAS1 on the card to the SAS1 connector on the expander.
2. Connect cable 2 from connector SAS2 on the card to the SAS2 connector on the expander.
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