iMac won't wake unless firewire cable to ext drive is disconnected

Discussion in 'iMac' started by calbear85, Dec 26, 2008.

  1. calbear85 macrumors newbie


    Dec 26, 2008
    Please advise....I have a 1TB Western Digital hard drive connected to a 24" 3.0GHz iMac via the Firewire 400 port. Frequently, the iMac will not wake up from being asleep unless the Firewire cable to the hard drive is disconnected. The hard drive is being used for Time Machine. Also, the iMac won't boot up after a restart unless the firewire is disconnected. I've had the iMac for over 6 months and finally started looking around for a solution.

    Thanks in advance!
  2. Sun Baked macrumors G5

    Sun Baked

    May 19, 2002
    If you have recently upgraded to 10.5.6

    This should get rid of this error...

    AppleFWOHCI_AsyncReceive::waitForDMA - context not going inactive.
    AppleFWOHCI_AsyncTransmit::waitForDMA - context not going inactive.

    That might be causing FW issues.

    As far as Time Machine, switching to USB2 might help.

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