C-5
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Appendix C RAID Controller Considerations
RAID Controller Cabling
Example 3—Two Expanders and One RAID Controller with Sixteen Drives
Figure C-3
shows an example of a server that is using one RAID controller in PCIe slot 3 and two
expander transition cards to control eight drives in each of the two modular drive bays.
Two RAID cables are required (2 x UCSC-CABLE-S).
•
The upper blue line is a 0.8m cable (UCSC-CABLE-S) from the RAID controller SAS 0 connector
to the first expander connector A (for drives 1 through 8).
•
The lower blue line is a 0.8m cable (UCSC-CABLE-S) from the RAID controller SAS 1 connector
to the second expander connector B (for drives 9 through 16).
•
The green line is a cable from the RAID controller to the battery backup unit.
Figure C-3
RAID Controller Cabling Guidelines, Two Expanders and One Controller
1
Expander transition cards
(shown with fan tray removed)
3
RAID controller card in PCIe slot 3
2
SCPM backup unit
(mounted to tray on air baffle)
1
2
3
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