Cisco Systems UCSSP6C220E manual Mixing Drive Types in RAID Groups, Mix of Drive Types, Allowed?

Appendix C RAID Controller Considerations

Mixing Drive Types in RAID Groups

Table C-2	Cisco UCS C220 M3 Large Form Factor Drives RAID Options
			Maximum	BBU or
Controller		Style	Drives	SCPM1	RAID Levels	Required Cables
Embedded MegaRAID2		Onboard	4 SATA or	No	0, 1, 54, 10	4 drives:
			4 SAS3			1 mini-SAS (UCSC-CABLE3)
			internal
Cisco UCS RAID SAS		Mezzanine	4 internal	No	0, 1, 1E, 10	4 drives:
2008M-8i:						1 mini-SAS (UCSC-CABLE3)
PID UCSC-RAID-MZ-C220
Cisco UCS RAID SAS		Mezzanine	4 internal	No	0, 1, 1E, 5, 10,	4 drives:
2008M-8i:					50	1 mini-SAS (UCSC-CABLE3)
PID UCSC-RAID-11-C220
(Includes RAID 5 & 50)
LSI MegaRAID SAS 9266-8i		PCIe	4 internal	BBU	0, 1, 5, 6, 10,	4 drives:
The cache memory of this					50, 60	1 mini-SAS (UCSC-CABLE3)
controller is ECC-protected.
LSI MegaRAID SAS		PCIe	4 internal	SCPM	0, 1, 5, 6, 10,	4 drives:
9266CV-8i					50, 60	1 mini-SAS (UCSC-CABLE3)
The cache memory of this
controller is ECC-protected.
LSI MegaRAID SAS		PCIe	8 external	SCPM	0, 1, 5, 6, 10,	Not sold by Cisco
9285CV-8e					50, 60

1.BBU = battery backup unit. SCPM = SuperCap power module.

2.Migrations from a RAID card to the embedded controller are not supported after-factory. See RAID Controller Migration, page C-6.

3.Support for four SAS drives requires an optional SCU upgrade ROM module on the motherboard.

4.Support for RAID 5 requires an optional RAID 5 software key module on the motherboard.

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-3 Drive Type Mixing in RAID Groups

Mix of Drive Types
in RAID Group	Allowed?
SAS HDD + SATA HDD	Yes
SAS SSD + SATA SSD	Yes
HDD + SSD	No

Cisco UCS C220 Server Installation and Service Guide

OL-25760-01 C-3