AnandTech: A Month with Apple's Fusion Drive
For the first time since late 2008, I went back to using a machine where a hard drive was a part of my primary storage - and I didnt hate it. Apples Fusion Drive is probably the best hybrid SSD/HDD solution Ive ever used, and it didnt take rocket science to get here. All it took was combining a good SSD controller (Samsungs PM830), with a large amount of NAND (128GB) and some very aggressive/intelligent software (Apples Core Storage LVM). Fusion Drive may not be fundamentally new, but its certainly the right way to do hybrid storage if youre going to do it.
It seems that Fusion Drive is really made for the user who doesn't necessarily have a ton of applications/data, but does have a reasonable sized media collection. For that user, Fusion Drive should be a reasonable approximation of a well managed SSD/HDD setup with your big media files going to the HDD and everything that you launch frequently living on the SSD. Im always going to ask for a larger cache, but I do believe that 128GB is a good size for most client workloads and usage models today. For me in particular Id probably need a 256GB cache for Fusion Drive to win me over, but I understand that Im not necessarily the target market here.