C-13
Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Appendix C RAID Controller Considerations
Embedded SATA RAID Controllers
Embedded SATA RAID Controller Considerations
Note the following considerations:
• The default setting for this embedded controller hub is SATA RAID 0, 1, and 10 support for up to
eight SATA drives (in two groups of four drives).
• You can upgrade to SATA RAID 0, 1, 5, 10 support for up to eight SATA drives (in two groups of
four drives) by installing a RAID 5 key module on the motherboard. See Installing a Software RAID
5 Key Module for Embedded RAID 5 Support, page C-13.
• When you order the server with this embedded controller, the controller is enabled in the BIOS.
Instructions for enabling the controller are included for the case in which a server is reset to defaults
(Disabled). See Enabling the Embedded SATA RAID Controller in the BIOS, page C-13.
• You cannot downgrade from using a hardware RAID controller card to using the software RAID
embedded controller (see RAID Controller Migration, page C-7).
Caution Data migration from software RAID (embedded RAID) to hardware RAID (a controller card) is not
supported and could result in data loss. Migrations from software RAID to hardware RAID are supported
only before there is data on the drives, or when there are no drives in the server (see RAID Controller
Migration, page C-7).
• The required drivers for this controller are already installed and ready to use with the LSI SWRAID
Configuration Utility. However, if you will use this controller with Windows or Linux, you must
download and install additional drivers for those operating systems. See Installing LSI MegaSR
Drivers For Windows and Linux, page C-16.
Installing a Software RAID 5 Key Module for Embedded RAID 5 Support
The software RAID 5 key module contains a chip on a small circuit board. This module attaches to a
two-pin motherboard header. This chip upgrades support to add embedded SATA RAID 5 support.
To install a RAID 5 key module, see Installing a Software RAID 5 Key Module for Embedded RAID 5
Support, page C-13.
Enabling the Embedded SATA RAID Controller in the BIOS
Note The default setting in the BIOS for the embedded controller is disabled.
When you enable this controller, both the primary (SATA) and secondary (sSATA) controllers are
enabled.