With a tmpfs mounted on /tmp: $ cd /tmp $ dd if=/dev/zero of=0 bs=1M ; sync ; sleep 5 ; rm 0
results in dmesg getting spammed with: uao_flush: strange, got an out of range flush (fixed) If the tmpfs is large enough (larger than physical RAM, maybe?) another error happens (I don't have it handy right now) and the system usually winds up wedged badly enough that "boot dump" from ddb won't work as designed. I can reproduce this on request. -- Shawn K. Quinn skqu...@rushpost.com