The hub is one I had lying around, if it had a psu it's long gone, and it didn't have a label either. I need a hub because my hdd (which won't work now either) doesn't have its own power cable and can't be powered from the pi

the power supply to the usb hub was 12v dc.

I didn't leave it in long enough to get hot and havent tried it again so I don't know.

I got a Pi 2 Model B a few days ago and have been setting it up as an OSMC media center and data server. I was trying to get an old powered usb hub to work and was trying different power supplies, and after trying 2.5 amp one the Pi turned off, and hasn't worked since! The power and activity lights ...