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Cisco UCS C220 Server Installation and Service Guide
OL-25760-01
Appendix C RAID Controller Considerations
Mixing Drive Types in RAID Groups
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.
Ta b l e C-2 Cisco UCS C220 M3 Large Form Factor Drives RAID Options
Controller Style
Maximum
Drives
BBU or
SCPM
1
1. BBU = battery backup unit. SCPM = SuperCap power module.
RAID Levels Required Cables
Embedded MegaRAID
2
2. Migrations from a RAID card to the embedded controller are not supported after-factory. See RAID Controller Migration, page C-6.
Onboard 4 SATA or
4 SAS
3
internal
3. Support for four SAS drives requires an optional SCU upgrade ROM module on the motherboard.
No 0, 1, 5
4
, 10
4. Support for RAID 5 requires an optional RAID 5 software key module on the motherboard.
4 drives:
1 mini-SAS (UCSC-CABLE3)
Cisco UCS RAID SAS
2008M-8i:
PID UCSC-RAID-MZ-C220
Mezzanine 4 internal No 0, 1, 1E, 10 4 drives:
1 mini-SAS (UCSC-CABLE3)
Cisco UCS RAID SAS
2008M-8i:
PID UCSC-RAID-11-C220
(Includes RAID 5 & 50)
Mezzanine 4 internal No 0, 1, 1E, 5, 10,
50
4 drives:
1 mini-SAS (UCSC-CABLE3)
LSI MegaRAID SAS 9266-8i
The cache memory of this
controller is ECC-protected.
PCIe 4 internal BBU 0, 1, 5, 6, 10,
50, 60
4 drives:
1 mini-SAS (UCSC-CABLE3)
LSI MegaRAID SAS
9266CV-8i
The cache memory of this
controller is ECC-protected.
PCIe 4 internal SCPM 0, 1, 5, 6, 10,
50, 60
4 drives:
1 mini-SAS (UCSC-CABLE3)
LSI MegaRAID SAS
9285CV-8e
PCIe 8 external SCPM 0, 1, 5, 6, 10,
50, 60
Not sold by Cisco
Ta b l e 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