The performance gain there isn't all that much with RAID0 but using JBOD where you don't write to both at once still means you have two drives, each of which can fail. Other drives might use RAID0 if there's a bandwidth limit somewhere. Mechanical drives can have quite high failure rates and being mechanical, they will always wear out and be subject to environmental conditions.Īpple has no reason to put two separate SSDs internally as they can get enough bandwidth to a single drive and put all the NAND chips in parallel. Your issue with RAID0 is that by having two or more controllers, it increases the chances that one will fail but less data is being written to each drive so it's not an issue either way. Writing to the chips in parallel increases their lifespan.
The SSD will write to each NAND chip in parallel, which is how RAID0 works but it's not two SSDs in RAID0.
It's a custom one with Sandisk NAND chips and Apple's own controller chips.
