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Date:      Mon, 25 Feb 2013 15:19:53 +0100
From:      Hans Petter Selasky <hselasky@c2i.net>
To:        Wouter Oosterveld <wouter.oosterveld@trimm.nl>
Cc:        "mav@freebsd.org" <mav@freebsd.org>, "freebsd-gnats-submit@freebsd.org" <freebsd-gnats-submit@freebsd.org>, "freebsd-usb@freebsd.org" <freebsd-usb@freebsd.org>
Subject:   Re: usb/176417: [xhci][cam][umass] kernelpanic while removing plugged in disk
Message-ID:  <201302251519.53882.hselasky@c2i.net>
In-Reply-To: <0CC28A5E3CD2E64386838267A534E8A98BF02DDFD6@cheyenne.trimm.local>
References:  <201302251119.r1PBJIi4034741@red.freebsd.org> <201302251233.30790.hselasky@c2i.net> <0CC28A5E3CD2E64386838267A534E8A98BF02DDFD6@cheyenne.trimm.local>

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On Monday 25 February 2013 15:09:12 Wouter Oosterveld wrote:
> Please not all this happened while the drive was plugged in at the time.
> 
> Is the powersafe feature of USB3.0 not understood (if any) by the kernel or
> something?
> 
> -Wouter

How long was the drive plugged when this happened? Usually a sudden disconnect 
means one or more of:

- USB device firmware crashed
- Cable issue
- Power loss or insufficient power

--HPS



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