On Sunday 02 September 2012 23:03:52 Waitman Gobble wrote:
> >Number:         171262
> >Category:       usb
> >Synopsis:       plug in sdhc via usb reader reboots machine
> >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:   Sun Sep 02 21:10:11 UTC 2012
> >Closed-Date:
> >Last-Modified:
> >Originator:     Waitman Gobble
> >Release:        FreeBSD 9.1-RC1
> 
> >Organization:
> Waitman Gobble
> 
> >Environment:
> FreeBSD kamira.waitman.net 9.1-RC1 FreeBSD 9.1-RC1 #0: Tue Aug 14 04:25:06
> UTC 2012     r...@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC 
> amd64
> 
> >Description:
> was dumping sdhc cards to ntfs-3g mounted usb drive (8 cards successfully,
> then inserting 9th card rebooted machine)
> 
> this in logs 45 times:
> 
> Sep  3 04:36:59 kamira kernel: (da1:umass-sim1:1:0:0): SCSI sense: HARDWARE
> FAILURE asc:4b,0 (Data phase error)
> 
> (then machine reboot.)
> 
> full log starting from insert:
> 
> 
 
> >How-To-Repeat:
> reader in usb port with sdhc card seems to work 'most of the time' but for
> some reason caused machine reboot in one instance. thank you.
> 

Hi,

If you add the kernel debugging options to your GENERIC file, then you will 
get a backtrace next time it crashes.

There is also a script under:
/usr/src/tools/regression/usb/

Which you can use to forcedly re-enumerate your USB card-reader. Try that when 
a card is inserted with NTFS and see what happens.

--HPS
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