Daisy-chained bus-powered FW 800 drives - enough power?

[kainjow]

Does anyone have any experience daisy-chaining FW 800 drives on a MBP? I've got one right now, but am thinking of adding another but I don't want to use an AC adapter if I don't need to. Will the MBP give enough juice to run 2 daisy-chained FW 800 drives (2.5")? I've got the late 08 unibody 15".

 

[cw2k7]

Depends on the drives as they all draw different amounts.

The MacBooks give upto 7 watts over firewire so it should be able to cope. Spinup draws the most power and so is normally the cause of it not working.

 

[kainjow]

I sent OWC an email about it since I bought one of their drives/enclosures and they said "Not likely. The Firewire port is limited in how many watts of power it will provide." which I know already but I guess I wanted a definite answer, and I'd rather not waste money testing it myself

 

[alphaod]

Yes it works.

Of course I have only tried with 2 5400RPM drives. I don't know if it will be different for 7200RPM drives.

 

[Eddyisgreat]

I have a g-raid mini which has two 5200 rpm drives in a single enclosure and it works fine over FW800 and even FW400, but I don't know how well it would work over two separate enclosures....