usb/176417: [xhci][cam][umass] kernelpanic while removing plugged in disk

[Wouter Oosterveld]

>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:

It was plugged in for 4 days. 

>- USB device firmware crashed

Could be. We use the same type of drive on Windows Servers. Not seen there yet.

Not tested with this specific drive. Will do.

>- Cable issue

Could be.

Not tested will do.

>- Power loss or insufficient power

Drive has its own power. LED is blinking as if in "no connection" or "powersafe" (conjecture).

>--HPS

-----Original Message-----
From: Hans Petter Selasky [mailto:hselasky at c2i.net] 
Sent: maandag 25 februari 2013 15:20
To: Wouter Oosterveld
Cc: freebsd-usb at freebsd.org; freebsd-gnats-submit at freebsd.org; mav at freebsd.org
Subject: Re: usb/176417: [xhci][cam][umass] kernelpanic while removing plugged in disk

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