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
| 1 | 2 | 3 |
|
|
| 334373 |
1 | Expander transition cards | 3 RAID controller card in PCIe slot 3 | |
| (shown with fan tray removed) |
|
|
2 | SCPM backup unit |
|
|
| (mounted to tray on air baffle) |
|
|
Cisco UCS C420 Server Installation and Service Guide
|
| |
|