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  1. #1


    Member Since
    Jan 22, 2007
    Posts
    31
    AcomData External Drive Problems
    I have an AcomData 320GB external drive that's supposed to operate at USB 2.0 speeds. However, it's registering as a USB 1.1 device, and so it's operating at USB 1.1 speeds, which is unacceptable for what I'm trying to use it for.

    I believe the problem is the special "CD" partition that the drive contains. It is "unformatable," supposedly, and mounts before the FAT32 other partitions on the drive. I think this forces it into USB 1.1 mode.

    Anyone have any suggestions or ideas? Or experience with these drives?

    The problem exists in windows, too, and on other computers, by the way.
    White Macbook
    2.0 GHz Intel Core2Duo
    2GB 667MHz RAM

  2. #2

    baggss's Avatar
    Member Since
    Oct 10, 2004
    Location
    Margaritaville
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    10,311
    Specs:
    27" 3.4 Ghz i7 iMac-13" C2D Macbook-OSX 10.10.2 -64Gb iPad 2-64 Gb iPhone 6+-ATV 2-14Tb of Storage
    Dumb question, but is it plugged into a USB 2 port? Do all the new Macs have USB 2 only?


  3. #3

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
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    28,932
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Since he is using a Macbook there would be nothing but USB 2.0 ports. Is the drive plugged straight into the Macbook or through a hub? You are the 2nd person here to have issues with that very drive running at 1.1. Does the drive have Firewire also or just USB?

  4. #4


    Member Since
    Jan 22, 2007
    Posts
    31
    I'm plugged directly into the Macbook's USB 2.0 ports. Unfortunately, the drive is only USB, so firewire, of course, is not a current option.

    Any suggestions about getting rid of that other "unformattable" partition so the drive can just be a normal USB 2.0 drive?

    AcomData hasn't responded to my e-mails and such and it's been nearly 4 months or so. Probably the worst company I have ever dealt with - I strongly recommend that no one buy anything from them.
    White Macbook
    2.0 GHz Intel Core2Duo
    2GB 667MHz RAM

  5. #5


    Member Since
    Jan 07, 2009
    Posts
    1
    I have that same "hi-speed" USB 2.0 Acomdata 320GB external hard disk, and I can't get it to operate above 12mbit/s on my iBook G4 either. It won't connect to my hi-speed USB 2.0 powered hub at all. It will work when plugged directly into my iBook G4, but not in 480mbit mode. Other similar devices like the 1TB Seagate Freeagent work in hi-speed mode on my USB 2.0 ports and hub, but I don't have another machine with USB 2.0 to test the Acomdata on. I'm using Mac OS X 10.5.6.

  6. #6

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,810
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Quote Originally Posted by evildork View Post
    I have that same "hi-speed" USB 2.0 Acomdata 320GB external hard disk, and I can't get it to operate above 12mbit/s on my iBook G4 either. It won't connect to my hi-speed USB 2.0 powered hub at all. It will work when plugged directly into my iBook G4, but not in 480mbit mode. Other similar devices like the 1TB Seagate Freeagent work in hi-speed mode on my USB 2.0 ports and hub, but I don't have another machine with USB 2.0 to test the Acomdata on. I'm using Mac OS X 10.5.6.
    Try completely erasing the drive and re-format it using Disk Utility. Format it to DOS (FAT-32). That's a long shot but it may work. I suspect those particular AcomData drives have defective firmware and\or drive electronics and probably should have been recalled or returned. Not much you can about that....

    Another thing you might try: Remove the drive from its case and place it in an external USB 2.0 case. That has a better chance of working.

    Regards.

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