Appendix C RAID Controller Considerations
RAID Controller Cabling
Example
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
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1 | Expander transition cards | 3 RAID controller card in PCIe slot 3 | |
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2 | SCPM backup unit |
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| (mounted to tray on air baffle) |
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Cisco UCS C420 Server Installation and Service Guide
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