Results 1 to 4 of 4
  1. #1
    USB External Drives automatically ejecting

    Member Since
    Dec 05, 2009
    Posts
    2
    USB External Drives automatically ejecting
    I've been having a chronic problem with any USB external drive connected to my Mac Pro. Wondering if anybody else here has experienced the same troubles.

    Appears to happen whenever I'm doing something intensive with the drive (i.e. moving a large file, editing video off of it, etc.).

    I haven't been able to figure out what the problem is. Perhaps it's the USB ports themselves, or maybe it's a power issue (I don't currently have a UPS for my tower).

    Anybody else seen this before?

  2. #2
    USB External Drives automatically ejecting
    hughvane's Avatar
    Member Since
    May 18, 2008
    Location
    Banks Peninsula, New Zealand
    Posts
    3,296
    Specs:
    MacMini 2.4, 8 Gb, OS 10.10 and 10.6; MacBook 2.4, 4 Gb, OS 10.6.8
    Is that external drive - any one - powered from the USB port itself? Mac USB does not always provide reliable power supply to external devices unless their demand is minimal, eg. keyboard and mouse. A UPS for the Pro won't make any difference to this issue.

    I suggest you invest in a quality powered external hub, or use mains-powered external devices, especially for the "intensive" work.

  3. #3
    USB External Drives automatically ejecting

    Member Since
    Dec 05, 2009
    Posts
    2
    The external drives (1 x 500GB, a couple others at 1TB) all have power adaptors, not USB powered. And I've tried using a USB hub, but to no effect.

    The building I'm in is VERY old and is pretty bad with dirty power, so I figured that could be the issue, but recently tried using a power distributor. Again, no effect.

    It's starting to sound like the problem is with the USB ports themselves, so I may have to get them looked at.

  4. #4
    USB External Drives automatically ejecting
    hughvane's Avatar
    Member Since
    May 18, 2008
    Location
    Banks Peninsula, New Zealand
    Posts
    3,296
    Specs:
    MacMini 2.4, 8 Gb, OS 10.10 and 10.6; MacBook 2.4, 4 Gb, OS 10.6.8
    Boot, and then run a hardware check from the Install Disk 1 > Disk Utilities [this is better than using DU from within the MacOS]. An analysis may show a USB fault. If so, it's likely to be on the motherboard, which, as I think you hint at, is a job for an expert.

    Re the "dirty power", if your Mac Pro is operating without faltering (excluding the USB issue), then the mains power is unlikely to be the cause of USB failure.

    Are your external drives firewire-capable? If so, try that avenue to see if you can get around the USB failures.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. External Drives ejecting on their own.
    By ProFaen in forum Apple Notebooks
    Replies: 7
    Last Post: 01-15-2015, 07:44 PM
  2. Replies: 1
    Last Post: 04-17-2014, 01:25 PM
  3. Ejecting USB Hard drives?
    By Chef_eam in forum Switcher Hangout
    Replies: 14
    Last Post: 07-10-2010, 04:39 PM
  4. Ejecting iPods and external drives?
    By Thrillhouse85 in forum Switcher Hangout
    Replies: 8
    Last Post: 06-18-2010, 04:24 PM
  5. Ejecting External Drives on a Mac
    By naftalim in forum Switcher Hangout
    Replies: 1
    Last Post: 10-21-2007, 11:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •