FD operates below the files, actually moving Core Storage blocks (which seem to be referred to internally as "chunks," as we'll see). The training still makes reference to FD moving "apps and documents" between SSD and HDD, though testing has shown this isn't quite true.
Late 2012 Mac Minis use a 2.5" SSD instead of a storage module. In particular, it notes late 2012 21" and 27.5" iMacs come with flash "storage modules," similar to the ones already seen on MacBook Airs and Retina MacBook Pros. The document sheds more light on the technology, confirming several things we speculated about. The other detailed preliminary hands-on results with our FD-equipped Mac Mini.Īrs also got ahold of Apple's service technician training document for Fusion Drive, thanks to a helpful anonymous source. "Jollyjinx"), who discovered that FD appears to work on any Mac running 10.8.2, not just new Minis and iMacs.
We've done two more peeks at FD, one diving into the impressive hackery done by Patrick Stein (a.k.a. In typical Apple fashion, though, the presentation was high on hyperbole but low on actual technical meat. The goal is to deliver the speed of an SSD, while also taking advantage of the large size of the HDD to hold the bulk of your data. FD uses Core Storage to create a single volume out of a solid state disk and a much larger traditional hard disk drive, and then tiers data back and forth between the two. To briefly review, FD is a feature announced by Phil Schiller on the October 23 Apple event, debuting in the new Mac Minis and iMacs also announced at the event.
We've learned a lot in a short time through observation and deduction, and while some questions are still unanswered, we've gotten a lot of outstanding, exclusive info. We also wanted to see what happens with installing Windows through Boot Camp, and what happens when Fusion Drive fails. We spent several days elbows-deep in the technology, attempting to determine how Fusion Drive (henceforth referred to as FD) works and what effect it has on overall system performance. (And it wasn't until the end of last week that Macs equipped with Fusion Drives actually began shipping.) Ars had its hands on a Fusion Drive-equipped Mac Mini for a few days now, and we set ourselves to the challenge of solving the mystery. Dismissed by some as just another simple cache mechanism, it's drawn a lot of attention in the weeks since it was announced. Apple's new Fusion Drive technology is a bit of a mystery.
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