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today i tried to watch movie [with vlc media player] from my external hard drive [expansion portable 500 GB], and it's play good, then pause the movie and play it again, and my Ubuntu crashed! [Ubuntu 12.04]
i had to restart the machine, so did it, but after that Ubuntu can't recognize this hard drive! i changed USB cable but it was not effective. this is my dmesg command result :

[  191.281630] usb 2-1.3: new full-speed USB device number 9 using ehci_hcd
[  191.353527] usb 2-1.3: device descriptor read/64, error -32
[  191.529115] usb 2-1.3: device descriptor read/64, error -32
[  191.704669] usb 2-1.3: new full-speed USB device number 10 using ehci_hcd
[  191.776524] usb 2-1.3: device descriptor read/64, error -32
[  191.952202] usb 2-1.3: device descriptor read/64, error -32
[  192.127772] usb 2-1.3: new full-speed USB device number 11 using ehci_hcd
[  192.534742] usb 2-1.3: device not accepting address 11, error -32
[  192.606749] usb 2-1.3: new full-speed USB device number 12 using ehci_hcd
[  193.013696] usb 2-1.3: device not accepting address 12, error -32
[  193.013906] hub 2-1:1.0: unable to enumerate USB device on port 3

note:

  • I am able to hear the sound of the external drive lens.
  • When attach hard drive to usb port, the status light goes on, but it's low bright and i think its power is low!
  • try to mount in Microsoft Windows 7, but nothing happened.
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1 Answer 1

The low light is a key, it indicates the drive is not getting enough power. Some external drives come with a special usb cable which allows plugging into two usb ports on the computer (one just for additional power). Using a powered hub is a good way to power such a drive. If your drive has its own power source, then maybe the problem is a (partial) power supply failure -- try another power supply if possible.

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thanx but it has no power supply. I think I should using guaranty. –  Netmoon Sep 26 '12 at 10:24
    
yesterday i try to test this hard drive with the cable that has two usb ports. i think one of those is for data and another is for power. test it, but no result. another try: plug it in d-link usb hub, with power cable attached and again nothing happened. –  Netmoon Jun 1 '13 at 19:13

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