My aging Early 2009 Macbook White is getting a bit long in the tooth, so after learning about Fusion Drive, I'm considering combining the existing 500GB HDD with a budget-to-medium-class SSD drive, to prolong the life of the machine.
As far as I understand, Fusion Drive will fill up the drive to within 4-5 GB of its capacity.
In other news I read that some mainstream SSD controllers (eg. Sandforce) have very poor write performance when the disk is used to its full capacity.
So my questions are:
Is the "fullness" of a Fusion Drive SSD considered "full capacity" in the context of controller performance degradation?
Which aftermarket SSDs are supposed to perform consistently fast in the Fusion Drive scenario? So far I have looked at Samsung 840, OCZ Vertex 2, Agility 3, Intel 330, based on a combination of price, brand reputation and reviews - but several of them are Sandforce drives.
Thirdly, does it make sense to create an empty 8-10 GB partition on the SSD before creating the Fusion Drive, to keep the drive from filling up? And is it even possible to create a Fusion Drive on a partitioned SSD?