i have a slew of sata laptop drives laying around, and a 5.25 mountable sata to usb adapter, if I don't use the power cable, can I use i to use the laptop sata drives?
The 2.5" and 3.5" SATA drives use the same data and power cable form factors. If you can plug a 3.5" drive in, you can plug a 2.5" drive in. So do 5 1/4" drives. But the power connectors are generally separate from the data cables. Like Phil said, you will ned to get power from somewhere.