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Mac Mini Dropping External Drive After Sleep

416 Views 9 Replies Latest reply: Apr 20, 2013 8:41 AM by OzziesMAC RSS
OzziesMAC Level 2 Level 2 (150 points)
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Apr 18, 2013 7:10 PM

Mac Mini on Mountain Lion, and I have two external drives on a dasiy chain with firewire 800.  Each drive has it's own power supply.  The mac mini seems to drop the second drive on the chain shortly after it enters sleep mode.

OS X Mountain Lion (10.8.3), 2.8Ghz Intel Quad Core i7 / 16GB /
  • BDAqua Level 10 Level 10 (114,800 points)
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    Apr 18, 2013 9:32 PM (in response to OzziesMAC)

    Hi, did you maybe install some drivers for one or more of these?

  • BDAqua Level 10 Level 10 (114,800 points)
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    Apr 19, 2013 10:53 AM (in response to OzziesMAC)

    OK, just checking, not an easy one then.

     

    Does it do it if  either one is connected first position?

     

    Open Console in Utilities & see if there are any clues or repeating messages when this happens.

     

    Have seen problems with TB->FW Daisychaining.

     

    Message was edited by: BDAqua

  • BDAqua Level 10 Level 10 (114,800 points)
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    Apr 19, 2013 5:50 PM (in response to OzziesMAC)

    OK, I was afraid of that, does it disappear from Disk Utility also?

  • BDAqua Level 10 Level 10 (114,800 points)
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    Apr 19, 2013 11:53 PM (in response to OzziesMAC)

    I personally think Apple messed up big time with TB/FW, only thig I can think of is unloadeding & reloading the FW kext after sleep.

  • Scorpii Level 2 Level 2 (175 points)
    Currently Being Moderated
    Apr 20, 2013 3:56 AM (in response to OzziesMAC)

    Hi, OzziesMAC.

     

    A few Ideas.

     

    Depending on the type or brand of drive an external HDD takes a few seconds to wake up from sleep.

     

    Is the second drive in the chain active or still asleep when the machine wakes up?

     

    Another possibility is that because the first drive takes a few seconds to wake, the port for the second drive is inactive so the Mac won't find it straight away. However, this shouldn't be a problem once the first drive in the chain is active and appears on the desktop. The second shouild also appear.

     

    The Mac drops the second drive when it enters sleep because the port on the first drive becomes inactive.

     

    When you wake the Mac and its found the first drive in the chain, you could try unplugging and replugging the cable from the second drive into the port on the first. Boring, but the Mac might find it again.

     

    I don't know if any of the above will help, but I hope it helps you find a solution.

     

    Regards,

     

    Scorpii

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