Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Could it support 1TB, or 2TB ?

I've heard FireWire 800 can power big external HDD.

share|improve this question
The only FireWire bus-powered drives I have seen are 2.5" (and those do not go up to 1TB, yet). – Chris Johnsen Nov 7 '09 at 8:49
up vote 1 down vote accepted

It depends on the type of hard drive used and the power supply your computer has for the FireWire ports. In theory, Firewire 400-6 pin can deliver 45 watts of peripheral power, which should be more than enough. Try to find how much power your PC delivers on the FW ports.

Biggest problem however is to find a Firewire 400 SataII HD case, without external power supply. On the other hand, if you find a Firewire 800 box, you could always connect it to your PC with a FW400-FW800 cable. 2,5 inch HDD cases with FW are always made for bus-powered operation, so if you can find a 1 TB 2,5 disk, go with that.

share|improve this answer

Overall, any 1.8" or 2.5" drive with a firewire external case could be powered off the Firewire bus, it doesn't matter if it's FW 400 or 800. The only caveat is that the manufacturer of the case may have not wanted to do so... (Thus you can still get power bricks...)

To my knowledge any 3.5" drive will need external power do to the power draw of spin-up. The power requirement for 3.5" drives is significantly higher than 2.5" or 1.8".

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .