Can 2010 MacBook Pro power 2 daisy chained FW800 external HDs? I have a 15 inch MacBook Pro (model MacBookPro6,2) with 2.66 gHz Intel Core i7 and 8 GB RAM from mid 2010.

Right now, I use a LaCie Firewire 800 bus powered Little Big Disk Quadra which works well. There are two Firewire 800 ports on the Little Big Disk Quadra, so I am wondering if I can daisy chain another Firewire 800 bus powered external hard drive to it? Will the MacBook Pro be able to power both?

Thanks.
Yes - I have routinely used up to 4 self powered devices one one FireWire port.

Tom's hardware report that at idle most laptop sized spinning hard drives use less than 1.5W idle and less than 4W at peak - so firewire should start to run out of power between 8 to 10 drives chained together assuming your mac is putting out at least 80% of the design power and they don't all spin up at exactly the same time.