ASROCK FM2A85X Extreme4-M User Manual page 172

7. And then key in drvcfg –s [Drv number] [Ctrl number] to enter Raid Utility.
For example: key in drvcfg –s 4E B5.
8. Choose Logical Drive Main Menu to set up Raid Drive.
9. Choose Logical Drive Create Menu to create a Raid Drive.
10. Choose Usable Physical Drive List to select Raid HDD.
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ASRock FM2A85X Extreme4-M Motherboard