ANSWER:

According to wikipedia:

Mini-SATA, which is distinct from the micro connector, was announced by the Serial ATA International Organization on September 21, 2009. Applications include netbooks and other devices that require a smaller solid-state drive. The connector is similar in appearance to a PCI Express Mini Card interface, and is electrically compatible, However the data signals (TX±/RX± S-ATA, PETn0 PETp0 PERn0 PERp0 PCI-express) need to go to the S-ATA host controller instead of the PCI-express host controller. Due to the fact there was no standard in the beginning there is still some fogginess around this subject. What makes this clear is this application note from NXP explaining how to use a PCI-express/S-ATA router chip. Of course one does not have to use such a chip, 4 simple three way switches would suffice.

Also, you can find another reference here.

by Diogo from http://superuser.com/questions/427880