CalDigit RAID Card - Manual (Page 47)

47 A. MacPro
1.22 After configuring your RAID, please launch Apple's Disk Utility
( application / utility / Disk utility ) to restore your Mac OS to
your new RAID Volume.
Make sure you choose the appropriate startup disk under system
preference after the restoring process is done.
1.23 Restart your computer and disconnect external hard disks.