On Mit, 2013-05-08 at 12:25 +0000, Ming Lei wrote:
> From the usbmon in correct case, there is no any ATA commands
> at all. I am not sure where these commands are from(user space
> or kernel?) in the failure case.

I suspect it's strictly kernel - I didn't even mount the drive. Mounting
is definitely possible (the drive works fine), but I wanted to show the
minimal difference.

> Could you install the upstream 3.9.0 kernel images on 12.04 to
> see if the HDD can work well?

Sorry, not possible (production machine). I also don't see what would it
bring, as the machine with 13.04 that shows the errors was working fine
with 12.04.

> Another difference is that length of the 2nd INQUIRY command becomes
> 12 instead of 6, which need to check further.

Please do and let me know.
-- 
Robert

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https://bugs.launchpad.net/bugs/1176355

Title:
  Can't access USB external disk

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