Apple offers a couple of software RAID solutions for people interested in either creating a larger disk out of two, or mirroring two disks together for data redundancy in the event of a drive failure.
OWC SoftRAID 9 adds RAID 6 and RAID 6+ protection designed to keep an array accessible after two drives fail, but the new modes require macOS 27.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results