Enter the size of the RAID array in the Capacity settings, and then click 'Create Volume.' Save your settings, exit and reboot to use your array or install an OS on it. Go with defaults, unless your research tells you otherwise. For RAID 0, 5 or 10, you'll choose a strip size, which is how it backs up data across disks.Hi, just to tell you that the clean installation and update on an iMac 11.2Mid 2010 of 21.5 'with x2 SSD Kingston on RAID 0 16GB Ram has worked perfectly with the MacOS High Sierra Patcher Tool for Unsupported Macs, without APFS, only Mac OS Plus registered.And if anyone of your HDDs is defect, your SR8-TB3-B would still work fine for you, but just with no more data protection feature. Under RAID 5 mode, SR8-TB3-B would need at least 3 or more HDDs to start working. RAID 5 mode provides both of the read-&-write efficiency and the data protection features for your daily works.