Hitachi 220H Bios Manual page 106

5. After selecting two physical drives to build a virtual drive, click Add To
Array.
Status of those selected disks is Online that is displayed in the Drive
Groups pane.
6. Click Accept DG.
7. The following window is displayed.
If you build a new virtual drive, repeat the steps 4, 5, and 6 until you select
all the physical drives used for RAID 10. And then, click Next.
If you add a virtual drive to the already existing Drive Group, click Next.
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To release a physical drive from [Online], select the drive and click
Reclaim.
MegaRAID WebBIOS
Hitachi Compute Rack 210H/220H BIOS Guide