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Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
AppendixC RAID Controller Considerations
RAID Controller Cabling
Example 1—One Nonexpander and One RAID Controller with Eight Drives
Figure C-1 shows an example of a server that is using one RAID controller in PCIe slot 3 and a
nonexpander transition card to control eight drives in the modular drive bay.
Two RAID cables are required (1 UCSC-CABLE-S and 1 UCSC-CABLE-L).
•The blue line is a 0.8m cable (UCSC-CABLE-S) from the RAID controller SAS 0 connector to the
nonexpander connector for PORT 1–4.
•The red line is a 1m cable (UCSC-CABLE-L) from the RAID controller SAS 1 connector to the
nonexpander connector for PORT 5–8.
•The green line is the cable from the RAID controller to the SCPM backup unit.
FigureC-1 RAID Controller Cabling Guidelines, Nonexpander Transition Card
1Nonexpander transition card
(shown with fan tray removed)
3RAID controller card in PCIe slot 3
2SCPM backup unit
(mounted to tray on air baffle)

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