>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
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Feb 25 11:20:00 UTC 2013
>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
TriMM Multimedia
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

Messages of USB disk getting removed and rediscovered while still plugged in. 

Kernelpanic while 'removing' device.


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


Machine is a ZFS fileserver with 16TB raidz2 array.
Plug in disk and see it getting 'removed' and rediscovered while being plugged 

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