01-11-2010 04:23 PM
As far as I am aware, the eSATA+USB port on a T400s does not differ from normal USB specifications in terms of teh available power.
The power available from USB ports is not enough to run a 3.5" drive, so you will need an external power supply foto do that.
USB ports can usually only support the power needs of 2.5" drives.
01-13-2010 09:10 AM
Im afraid that this will be not possible because 5.25 drive needs 5V and also 12V, and in USB/eSata connector is only 5V as I know, In anyway external power supply will be needed.