I recently purchased a large HDD along with the following HDD enclosure:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817173043

It has a simple on-off switch on the back.

When I want to turn this thing off, do I simply just flip the switch? I assume the switch simply kills the power to the HDD, but isn't that potentially a bad thing in the case that the HDD is still reading/writing?

I used to have a Seagate external HDD and it had a button on the front that I had to hold down for a second or two before it would turn off, but it at least appeared to sort of go through a shutdown procedure where it probably would stop the HDD activity before cutting power.

So with this external HDD, I'm a little bit leery about that power switch and understanding exactly what it does. Is this how all HDD enclosures are?

EDIT: I'm running the drive in Ubuntu Server. So there is no 'ejecting' the drive lol