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Date:      Mon, 24 Aug 2015 09:30:13 +0200
From:      Hans Petter Selasky <hp@selasky.org>
To:        Shrikanth Kamath <shrikanth07@gmail.com>, freebsd-usb@freebsd.org
Subject:   Re: Debugging CAM_REQ_CMP_ERR errors / bulk transfer failures
Message-ID:  <55DAC805.5070502@selasky.org>
In-Reply-To: <CAEOAkMVk2oN1t8DQznTqTr=%2BjM8Nk4cpVZAKQP0YVx%2BdMDmBxA@mail.gmail.com>
References:  <CAEOAkMVk2oN1t8DQznTqTr=%2BjM8Nk4cpVZAKQP0YVx%2BdMDmBxA@mail.gmail.com>

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On 08/24/15 09:25, Shrikanth Kamath wrote:
> umass0: BBB reset failed, IOERROR
> umass0: BBB bulk-in clear stall failed, IOERROR
> umass0: BBB bulk-out clear stall failed, IOERROR

This means your USB HDD is no longer responding. Maybe a USB 
re-enumeration will help, though then you will loose the disk. Possible 
USB firmware bug/race.

--HPS



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