Created attachment 157803 [details]
Screenshot of panic
I've now seen this crash twice in a week
One of the disks on my isci(4) controller is going bad, and sometimes hangs and times out on the controller.
When this happens, and the controller goes to remove the device, it panics the system.
I wasn't able to use the debugger prompt because I had to reset the IPMI interface to get it to let me connect, so lost the USB keyboard.
FreeBSD Tango.HML1.ScaleEngine.net 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r279288: Wed Feb 25 20:44:39 UTC 2015 root@Tango.HML1.ScaleEngine.net:/usr/obj/usr/src/sys/SCALEENGINE amd64