--On Friday, June 06, 2008 19:36:46 +0200 "Arno J. Klaassen" <[EMAIL PROTECTED]> wrote:

I can easily produce a similar panic on a dual Opteron 185 with
3G of RAM and running 7-stable-amd64 on a (cheap) nvidia-based MB.
It runs gmirror on atapci1 and I attach a geli-encrypted
disk via usb. Both share irq 23.

Under heavy load ("periodic security" is enough ) it panics after
having disconnected umass0 ( kgdb trace below ) :

Unread portion of the kernel message buffer:
umass0: at uhub1 port 1 (addr 2) disconnected
(da1:umass-sim0:0:0:0): lost device
(pass1:umass-sim0:0:0:0): lost device
(pass1:umass-sim0:0:0:0): removing device entry


I have problems with umass during reboot. It causes a kernel panic and a forced reboot. To work around the problem, I disconnect the usb cable to reboot. Once the system comes back up, I can map the drive with no problems.

If someone can tell me how to capture the information, I'd be glad to do so. I have no idea how to do it, and, after I disconnect the cable and reboot again, dmesg.boot looks perfectly normal. I've looked for core files but haven't found any. savecore -C returns "No dump exists".

This is my workstation, so I can fiddle with it as need be to capture useful information. I just need someone knowledgeable to walk me through it, because this type of work is definitely out of my league.

# uname -a
FreeBSD utd65257.utdallas.edu 7.0-STABLE FreeBSD 7.0-STABLE #7: Sun Jun 8 15:58:57 CDT 2008 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC i386

I just rebuilt world and kernel again, hoping the latest patches would solve the problem, but it didn't.

--
Paul Schmehl
As if it wasn't already obvious,
my opinions are my own and not
those of my employer.

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