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I have Ubuntu 12.10 installed on my pen drive, in order for me to delete certain files of my Windows NTFS drive (I cannot boot in to Windows due to a file in there). However, when I click on the drive in the Ubuntu file explorer, I am greeted with this unfortunate message:

Adding read ACL for uid 9999 to /media/ubuntu failed: Operation not supported
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Open a terminal with CTRL+ALT+T keys combo and give this command sudo fdisk -l post back the results , edit your question. –  NikTh Oct 31 '12 at 21:30
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/media/ubuntu doesn't sound like the path where Windows would be mounted in linux unless the label on your Windows partition is "ubuntu". It would more likely be /media/748388599828 (A NTFS/FAT UUID) or /media/LOCALDISK or /media/OS which are common partition names for Windows –  Huckle Oct 31 '12 at 21:34

1 Answer 1

I just got exactly the same problem,my friend gave me the link,and the solution worked like a charm.

Apparently,some USB flashdisk just can't work with some USB 2.0 driver,so the solution is to disable ehci_hcd

here's the link:
http://www.geekdevs.com/2010/04/solved-unable-to-enumerate-usb-device-disabling-ehci_hcd/

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Welcome to Ask Ubuntu! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. –  Kevin Bowen Feb 7 '13 at 2:53

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