If I use this Hard Drive with the Firewire800 to Thunderbolt adaptor the conection will provide enough power? work fine?

I was thinking about buying one of these, but since my MacBook Air doesn't have USB 3.0 I would have to use the Firewire800 to Thunderbolt adaptor, and I don't know if this conection will be able to provide the power that this drive needs.

LaCie Rugged Triple USB 3.0 External Hard Drive

LaCie Rugged Triple USB 3.0 External Hard Drive

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