2 Replies Latest reply: Dec 10, 2012 10:08 PM by Linc Davis
Rizzice1 Level 1 Level 1 (10 points)

What exactly are the differences? Essentially the SSD/flash storage is a little faster with smaller space?


If I can afford the 768GB flash storage is that the obvious choice for me if 768GB is enough space? Is the speed difference significant?


The extra price for flash storage is expensive, but considering the HD can't be upgraded I don't want to cut corners if it's the best choice.


I am putting in my order in soon and this is my last thing I need to decide, any input would be appreciated! Thanks!

MacBook Pro, Mac OS X (10.6.8)
  • BDAqua Level 10 Level 10 (120,655 points)

    The fusion ndrive just makes th regular HDD faster, as it acts like a giant Cache, it doesn't relly add to your storage potential as a seperate drive would.

  • Linc Davis Level 10 Level 10 (169,220 points)

    The Fusion Drive combines two physical storage devices into a single volume. The size of that volume is the sum of the capacities of the devices. So for example, if the SSD has a capacity of 256 GB and the HDD has 1 TB, the FD will have a capacity of about 1.25 TB.


    FD adaptively moves data between the devices so that the most often accessed files (actually blocks) are on the SSD.


    How well it performs relative to an SSD will depend on you usage pattern. In my tests, I get about 90% of file accesses to the SSD.


    One drawback of FD is that there are two points of failure instead of one. If either device fails, the whole volume is lost.