C-1
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
APPENDIX
C

RAID Controller Considerations

This appendix provides RAID controller information, and it includes the following sections:
•Supported RAID Controllers and Required Cables, pageC-1
•Supercap Power Modules (RAID Backup Units), page C-2
•Mixing Drive Types in RAID Groups, pageC-2
•RAID Controller Cabling, pageC-2
•Restoring RAID Configuration After Replacing a RAID Controller, pageC-6
•For More Information, page C-6

Supported RAID Controllers and Required Cables

This server supports the RAID controller options and cable requirements shown in Tabl e C-1.
Note Do not mix controller types in the server.
TableC-1 Cisco UCS C420 Server Supported RAID Options
Controller Style
Maximum
Drives
Optional
SCPM? RAID Levels Required Cables1
1. The number and type of cables vary, depending on which type of transition card is used and how many controllers are used.
See also RAID Controller Cabling, pageC-2.
LSI MegaRAID
SAS 9271CV-8i
PCIe 8 internal2
or 16 internal
with expander3
2. When using the nonexpander-style transition card, each controller can support 8 drives; you can install two controllers and
two nonexpander transition cards to control a total of 16 drives.
3. When using two expander-style transition cards, one controller can control 16 drives.
Yes 0, 1, 5, 6, 10,
50, 60
•One controller with one nonexpander:
1 UCSC-CABLE-S + 1 UCSC-CABLE-L
•Two controllers with two nonexpanders:
2 UCSC-CABLE-S + 2 UCSC-CABLE-L
•One controller with two expanders:
2 UCSC-CABLE-S
LSI MegaRAID
SAS 9286CV-8e
PCIe 128 external Yes 0, 1, 5, 6, 10,
50, 60
Cisco does not sell the cables for external drives.