I'd like to pose some questions re the fusion drive concept that no one seems to be talking about yet.
What happens when the fusion drive fails?
What pathways to recovery will an "ordinary" (non-techie) user have?
Since it was announced, there have been raves about how fast the fusion drive is, how "transparent" it is to the user -- and essentially nothing about what to do when it breaks.
I sense that with fusion, Apple is trying to "dumb down" multiple disk management, in way not unlike Time Machine was intended to dumb down backup.
With Time Machine, the end user doesn't have to do anything except connect a backup drive and "turn on the switch" -- backup becomes so easy! EXCEPT -- sometimes the user's drive fails, and they suddenly discover they've lost the ability to boot (we see postings to that effect right here). Or, they get booted, connect their TM backup and -- can't access it, it won't open, etc. (we see postings like that right here).
With fusion, what happens in the case of a drive failure, either the SSD or HDD? Obviously, the computer isn't going to boot from the F-drive. The user may or may not be able to access the recovery partition, but even if he does, what kind of options will he have? If one drive is kaput, the F-drive won't work. Neither of them, unless the "fusion" is "broken" and the drives are un-fused. Will there be quick-n-easy software that can do this? Or will non-techie end-users be forced into the Terminal app? Will it become impossible to "un-fuse" a failed F-drive?
At least with two "independent" drives, in the event of one drive's failure or directory corruption, the other drive will probably show up on the desktop. In that case, the user could install a basic system, and get going again.
Actually, with both an SSD and a HDD, the best course of action is to partition the HDD, and create at least one "alternate boot partition" with an operational OS and some apps on it. Modern drives are large enough in capacity so that this is easy. There is NOTHING that can sub for an alternate boot source in a moment of extreme need. Not even the recovery partition can match that.
Apple's fusion drive looks attractive for the masses, at the moment.
But I see problems with it down the line...