unable to 'safely eject' my new external drive.

Page 2 of 2 FirstFirst 12

  1. Posts : 4,466
    Windows 10 Education 64 bit
       #11

    The standard USB 2 port is limited to 500ma per port. If the external drive requires more than that it will often come with power pack, a second USB power cable, or the main cable will have two USB plugs on it. One power and DATA and one power only. My laptop drive enclosure came with the two cables. If I don't plug the power only cable in before the DATA and power cable the drive doesn't get detected properly and or acts erratic.
      My Computer


  2. Posts : 4,049
    W7 Ultimate SP1, LM19.2 MATE, W10 Home 1703, W10 Pro 1703 VM, #All 64 bit
       #12

    TVeblen said:
    My best guess is that it is due to poorly written software that starts a service or process and then does not release it or shut it down when you close the program. The system thinks the drive is still active because the process/service is still running.
    According to "Process Explorer" the offending process is usually Windows Explorer (on my PC anyway).
    Last edited by lehnerus2000; 02 Jun 2012 at 08:54. Reason: Quote Added
      My Computer


  3. Posts : 6,292
    Windows 7 64 Bit Home Premium SP1
       #13

    Just to be sure we are not giving out confusing information:
    The USB standard is 500–900 mA @ 5v .
    DC of course.

    Universal Serial Bus - Wikipedia, the free encyclopedia
    Attached Thumbnails Attached Thumbnails unable to 'safely eject' my new external drive.-usb-2.png   unable to 'safely eject' my new external drive.-usb-3.png  
      My Computer


  4. Posts : 115
    Windows 7 Home Premium 32bit
    Thread Starter
       #14

    TVeblen said:
    So the problem is solved?
    unless it happens again, it looks like this was probably the cause.
    probably fair to mark it as solved since it probably has nothing to do with Windows 7 :)
      My Computer


  5. Posts : 4,466
    Windows 10 Education 64 bit
       #15

    I stand corrected, the old standard was 500ma. There are some high powered ports that will give out more. Still, I think you'll find that most external drives are designed with the 500ma limit in mind. The higher current output is a good thing if you're recharging a phone or MP3 player though. Technology marches on.
      My Computer


 
Page 2 of 2 FirstFirst 12

  Related Discussions
Our Sites
Site Links
About Us
Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 04:03.
Find Us