Notes On Supported Embedded Megaraid Levels - Cisco UCS C240 Installation And Service Manual
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Appendix C
RAID Controller Considerations
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Notes on Supported Embedded MegaRAID Levels
The following RAID levels are supported by the embedded MegaRAID controller.
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None of these RAID levels require drives of the same size. The smallest drive in the array determines
Note
the size of the VD.
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An array can be divided into multiple VDs of the same RAID level, except when using RAID 10. Mixed
arrays are not permitted. For example, you cannot configure a three-drive array into RAID 0 and RAID 5
VDs. Unlike RAID 0, 1, and 5, you cannot create multiple RAID 10 VDs from the same array. A single
RAID 10 VD uses up the entire array.
OL-25761-01
Enabling the Embedded RAID Controller in the BIOS, page C-11
Disabling the Embedded RAID Controller in the BIOS, page C-12
Launching the LSI Embedded RAID Configuration Utility, page C-12
Installing LSI MegaSR Drivers For Windows and Linux, page C-12
RAID 0—You can configure a RAID 0 virtual drive (VD) using one or more physical drives (PDs).
This level supports up to eight VDs and PDs.
RAID 1—A RAID 1 VD is configured from only two PDs. This level supports up to eight PDs (four
RAID arrays) and eight VDs.
RAID 5—You can configure a RAID 5 VD using three or more PDs. This level supports up to eight
PDs and eight VDs.
RAID 10—This is a spanned VD; that is, RAID 0 is implemented on two or more RAID 1 VDs. This
level supports up to eight PDs (two to four RAID 1 volumes spanned) and one VD.
Cisco UCS C240 Server Installation and Service Guide
Embedded MegaRAID Controller
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