Cannot simultaneously use FW scanner and external FW HD

Discussion in 'Mac Accessories' started by cjd, Dec 3, 2010.

  1. cjd macrumors newbie

    Nov 25, 2010
    I have a Canon 9950F scanner and an external G-Technology 1TB HD. I connect them through Firewire (800 for the HD and 400 for the scanner) and can use either of them separately with no problem, but recently I tried to use them simultaneously and found out that turning on the HD while using the scanner interrupts communication with the scanner. This happens with both a 2008 Mac Pro or a 2008 MBP. Apple says this could be caused by the Canon scanner driver. Canon says it is an Apple problem. I can get around by connecting either peripheral through USB but I prefer to use the FW connections (800 for the HD and 400 for the scanner). Any thoughts? Thanks.
  2. FourCandles macrumors 6502a

    Feb 10, 2009
    Are you daisy chaining these devices or using separate FW800 and 400 ports on the Macs? If the former, I've heard of some problems with throughput on certain devices because of the FW IO boards used in them.
  3. cjd thread starter macrumors newbie

    Nov 25, 2010

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