Deleting Raid Volumes - ASROCK H77 Pro4-M Installation And Configuration Manual

Please note that you are only allowed to create one RAID
partition at a time under BIOS RAID environment. If you want
to create an extra RAID partition, please use the RAID utility
under Windows environment to configure RAID functions after
you install OS.

2.6 Deleting RAID Volumes

If you want to delete a RAID volume, please select the option
Delete RAID Volume, press <Enter>, and then follow the
instructions on the screen.
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