Acer Altos R710 - Manual (Page 194)

Appendix C: RAID Configuration 182
4 After selecting the drives, press and select YES to start the
initialization process.
5 When initialization is complete, press any key to continue.
6 Press to return to the Management Menu.
Save And Exit MegaRAID Configuration Utility
1 When RAID configuration and initialization is complete, press
in the Management Menu and select YES to exit the
MegaRAID Configuration Utility.
2 Press + + to reboot the server. Now you can
start installing an OS on the RAID array.