Mini PCIe - SSD card on Notebook and if it has HD interface difference

Hi,

I'd like to know more about the relationship about the mini PCIe and the HD interface. I read some info on Wiki and other places, but it doesn't seem it has the answer.

I see that there are Solid State Drives (SSD) with Mini PCIe interface. However, it seems it that it would also "sub-divided" into SATA and PATA bus. huh.. I am a little confused.

The reason I ask is that I want to know if I can insert a SSD with Mini PCIe to my Dell Latitude notebook. To be exact, I want to know if I can insert on the Mini PCIe slot that's for WAN in the Dell system. I don't have a WAN card. It is empty. I wonder if I can make use of it.

First, I thought Mini PCIe itself is already a "bus" or a connection type, it would act like external USD device. I thought I can insert the SSD with mini PCIe to the WAN slot.

However, I was checking out NewXgg.com and a few other places. It would sub-divide it between PATA and SATA. So, does it mean it would have a different interface? My Dell Latitude has the older PATA internal harddrive. Not sure if it really matter if I can use either SATA or PATA SSD card with Mini PCIe.

Would you please help me out?

Thanks

PCIe based SSD are bootable so no problem plugging in a mini-PCIe into a spare slot in your laptop and load your main OS onto it.
$/GB-wise tho OCZ Agility (Indilinx based SATA SSD) is the better option.

They designate the empty/2nd mini-PCIe slot for WAN usage due to marketing. mini-PCIe is universal.