Cisco Systems UCS C420 manual Supported RAID Controllers and Required Cables, RAID Levels

A P P E N D I X C

RAID Controller Considerations

This appendix provides RAID controller information, and it includes the following sections:

•Supported RAID Controllers and Required Cables, page C-1

•Supercap Power Modules (RAID Backup Units), page C-2

•Mixing Drive Types in RAID Groups, page C-2

•RAID Controller Cabling, page C-2

•Restoring RAID Configuration After Replacing a RAID Controller, page C-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 Table C-1.

Note Do not mix controller types in the server.

Table C-1	Cisco UCS C420 Server Supported RAID Options
			Maximum	Optional		Required Cables1
Controller		Style	Drives	SCPM?	RAID Levels
LSI MegaRAID		PCIe	8 internal2	Yes	0, 1, 5, 6, 10,	• One controller with one nonexpander:
SAS 9271CV-8i			or 16 internal		50, 60	1 UCSC-CABLE-S + 1 UCSC-CABLE-L
			with expander3			• Two controllers with two nonexpanders:
						2 UCSC-CABLE-S + 2 UCSC-CABLE-L
						• One controller with two expanders:
						2 UCSC-CABLE-S
LSI MegaRAID		PCIe	128 external	Yes	0, 1, 5, 6, 10,	Cisco does not sell the cables for external drives.
SAS 9286CV-8e					50, 60

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, page C-2.

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.

Cisco UCS C420 Server Installation and Service Guide

OL-27640-01 C-1