https://appleinsider.com/inside/macos/tips/how-to-build-your-own-raid-for-macos-on-a-budget
A Redundant Array of Inexpensive Disks (RAID) is a way to speed up your computer by using special hardware to make multiple drives look like a single drive to your Mac.
This usually involves multiple drives inside a special enclosure with a controller board that knows how to do disk input/output (I/O) to all the drive mechanisms. But at the same time, it aggregates the data and presents it to the computer as one single storage device.
RAID has been around for decades, long before SSDs. It was originally developed as a way to speed up relatively slow mechanical spinning platter disk drives in the early 1980’s.
The original RAID systems were expensive and usually required some kind of expansion card. Today, while the expansion cards still exist, there are USB and Thunderbolt RAID enclosures which make the process easier and cheaper…
