Any idea what this is? The machine is running 4.0beta2.
Oddly enough, Ctrl-Alt-Fx still worked, als well as Ctrl-T on the console.
It's unlikely to be a memory issue since we're using ECC RAM.
Sorry, no dump. Looks like I forgot to configure a dump device on the disk
underlying the RAID.

uvm_fault(0xffff80004e1c32d0, 0x0, 2) -> e
fatal page fault in supervisor mode
trap type 6 code 2 rip ffffffff80283958 cs 8 rflags 10246 cr2  0 cpl 0 rsp ffff80004dbc4b40
panic: trap
syncing disks ...