Quote Originally Posted by alfaunits View Post
The MFT reserved area is smaller on an SSD than on an HDD of a similar size, thus more of an SSD is used, whereas on an HDD certain are of the drive (10% even) might never be touched unless the drive gets filled >90%.
The log does not record last access time on an SSD by default, whereas it does on an HDD (W7 only).

The area where data is written to on an SSD is different than that on an HDD because the starting format is not the same. There is quite a bit of difference. It's not 50% or probably not even 20% difference in terms of amount, but with random I/O it can be >10%.
I still don't know what you mean, but yes I forgot the W7 SSD optimizations.