Mixing Drive Types In Raid Groups; Supercap Power Modules (Raid Backup Units - Cisco UCS C22 Installation And Service Manual

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Appendix C

RAID Controller Considerations

Mixing Drive Types in RAID Groups

Following are the rules for mixing hard disk drive (HDD) and solid state drive (SSD) types in a RAID group

with the supported controllers.

Table C-2

Mix of Drive Types 

in RAID Group

SAS HDD + SATA HDD

SAS SSD + SATA SSD

HDD + SSD

This server supports installation of one SuperCap power module (SCPM). The backup unit mounts to a

holder near the cooling fans (see

MegaRAID-CV controller cards. This supercap module provides approximately 3 years of backup for the

disk write-back cache DRAM in the case of sudden power loss by offloading the cache to the NAND flash.

For SCPM replacement instructions, see

page

OL-26646-01

Drive Type Mixing in RAID Groups

Allowed?

Yes

3-37.

Figure

3-22). The SCPM is available only when using the optional LSI

Replacing the SuperCap Power Module (RAID Backup Unit),

Cisco UCS C22 Server Installation and Service Guide

Mixing Drive Types in RAID Groups

C-3

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