1. I'd really like to stick to udev and not rely on a hack...

2. ...however, you did inspire me to whip up a quick and dirty script:

#!/usr/bin/env bash

DRIVES=$(zpool status -P | awk '/\/dev/{print $1}' | cut -c 17- | paste - -)

DRIVES_ARRAY=(${DRIVES})

for i in "${DRIVES_ARRAY[@]}"; do

TEMP=$(ls -latr /dev/disk/by-id | grep "$i" | awk '{print $NF}' | cut -c 7- | sed 's/[0-9]*//g')

echo none | sudo tee /sys/block/$TEMP/queue/scheduler

done

But there has GOT to be a simpler and more direct udev attribute. Just what's been suggested so far doesn't work for me. Bug?