Comment 152 for bug 131094

I don't know how to redirect with sudo.

I had to run:
sudo bash

this gave a root prompt, then I could run:
echo deadline > /sys/block/sda/queue/scheduler

without running sudo again (running bash with sudo makes the prompt root until you type exit).

I am curious about your fstab though, that was what really changed things for me.

Also, to you have lots of small files or a few big ones? I can try testing. It was primarily running updates, and the daily file indexing that killed me.