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Date: Mon, 08 Mar 2010 15:09:24 -1000
From: Al Plant <noc@hdk5.net>
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To: Bruce Cran <bruce@cran.org.uk>
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Cc: David Jackson <djackson452@gmail.com>, freebsd-questions@freebsd.org
Subject: Re: Severe instabilities and system lockups
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Bruce Cran wrote:
> On Monday 08 March 2010 16:52:08 David Jackson wrote:
> 
>> Are there any diagnostic tools uch as getting a log of tranmissions on
>> USB and probe it, ,or finmd out what code it is lockilng up on ?Has
>> anyone else seen these problems with USB disks?
> 
> You'll probably get a better response by asking on the freebsd-usb mailing 
> list.
> 
> The following debug nodes for USB in 8.0 are present:
> 
>> sysctl hw.usb | grep debug
> hw.usb.ehci.debug: 0
> hw.usb.ohci.debug: 0
> hw.usb.uhci.debug: 0
> hw.usb.ctrl.debug: 0
> hw.usb.umass.debug: 0
> hw.usb.debug: 0
> hw.usb.dev.debug: 0
> hw.usb.ugen.debug: 0
> hw.usb.uhub.debug: 0
> hw.usb.proc.debug: 0
> hw.usb.ulpt.debug: 0
> hw.usb.ucom.debug: 0
> hw.usb.uhid.debug: 0
> hw.usb.ukbd.debug: 0
> hw.usb.ums.debug: 0
> 
> Your first step should probably be to get a verbose boot log (boot -v) - one 
> of the USB developers will likely know better than I do which sysctl debug 
> nodes to set to get more details.
> 
Aloha,

If the node is disappearing for the USB device and it is connected by a 
cable to the box try replace the cable. We had one here that would not 
stay listed on the hardware and it was the cable connector gone bad.

I have never had a USB device lock up the box though.

~Al Plant - Honolulu, Hawaii -  Phone:  808-284-2740
   + http://hawaiidakine.com + http://freebsdinfo.org +
   + http://aloha50.net   - Supporting - FreeBSD  7.2 - 8.0 - 9* +
   < email: noc@hdk5.net >
"All that's really worth doing is what we do for others."- Lewis Carrol