The following reply was made to PR usb/176417; it has been noted by GNATS.

From: Hans Petter Selasky <hsela...@c2i.net>
To: freebsd-usb@freebsd.org
Cc: Wouter Oosterveld <wou...@trimm.nl>,
 freebsd-gnats-sub...@freebsd.org,
 m...@freebsd.org
Subject: Re: usb/176417: [xhci][cam][umass] kernelpanic while removing plugged 
in disk
Date: Mon, 25 Feb 2013 12:33:30 +0100

 Hi,
 
 This does not look like an USB issue. It is related to CAM/SCSI layer. mav @ 
 CC'ed
 
 --HPS
 
 On Monday 25 February 2013 12:19:18 Wouter Oosterveld wrote:
 > >Number:         176417
 > >Category:       usb
 > >Synopsis:       [xhci][cam][umass] kernelpanic while removing plugged in
 > >disk Confidential:   no
 > >Severity:       non-critical
 > >Priority:       low
 > >Responsible:    freebsd-usb
 > >State:          open
 > >Quarter:
 > >Keywords:
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Mon Feb 25 11:20:00 UTC 2013
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Wouter Oosterveld
 > >Release:        FreeBSD backup01-trimm.trimm.net 9.0-RELEASE-p3 FreeBSD
 > >9.0-RELEASE-p3 #0: Tue Jun 12 02:52:29 UTC 2012    
 > >r...@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
 > 
 > >Organization:
 > TriMM Multimedia
 > 
 > >Environment:
 > FreeBSD backup01-trimm.trimm.net 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0:
 > Tue Jun 12 02:52:29 UTC 2012    
 > r...@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
 > 
 > >Description:
 > Symptoms:
 > 
 > Messages of USB disk getting removed and rediscovered while still plugged
 > in.
 > 
 > Kernelpanic while 'removing' device.
 > 
 > Hardware:
 > 
 > Sweex 2 Port USB 3.0 Card PCI Express (cheap)
 > Chip reads D720200F1 / 1119KU603 / Japan
 > 
 > Western Digital "My Book Essential" with large >1TB disk.
 > 
 > Screenshot: https://www.dropbox.com/s/bol6fxl37e7mu3g/IMAG0478.jpg
 > 
 > Note:
 > 
 > Machine is a ZFS fileserver with 16TB raidz2 array.
 > 
 > >How-To-Repeat:
 > Plug in disk and see it getting 'removed' and rediscovered while being
 > plugged in.
 > 
 > >Fix:
 > >
 > >
 > >Release-Note:
 > >Audit-Trail:
 > 
 > >Unformatted:
 > _______________________________________________
 > freebsd-usb@freebsd.org mailing list
 > http://lists.freebsd.org/mailman/listinfo/freebsd-usb
 > To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
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