Supongo que el problema viene por la similitud entre los conectores mini PCIe y mSATA.
Are mini PCIe and mSATA the same thing?
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, but is electrically incompatible, 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.
Sin embargo, otras búsquedas en Google sugieren que el diseño pueda haber evolucionado para que sean compatibles:
Mini-PCIe is the port name/type. It can accomodate wireless cards, WAN (cellular) cards, etc. mSATA is the specification for SSDs that can be put into mini-PCIe slots.
Not all mini-PCIe slots are mSATA-capable. Z68 chipsets & Sandy Bridge laptops have mini-PCIe slots that are mSATA-capable (have the proper wiring). The connector is physically the same on new and old slots.
mSATA and mPCIe SATA (as used on netbooks) have a slightly different pinout. A mPCIe (with pci-e signals) slot is another thing altogether. They are usually used for wifi cards. No mSATA/mPCIe SSDs can be used in those slots as they are expecting to be attached to a SATA controller rather than a pci-e bus.
As stated, mSATA SSDs are run through the miniPCIe port. But note that not all miniPCIe ports are capable of running a SSD if they do not have a connection to the storage controller.
Si la placa es anterior al chipset Z68, es probable que si viene especificado como zócalo de dispositivo de almacenaje, esté enrutado hacia dicho controlador y no soporte todo el protocolo mPCIe.