Comment 5 for bug 982421

I have tried ext4, ext3, raiserfs, all unencrypted all the same - poor performance.

It looks like journaling is causing the problem:
output of iotop
1001 be/3 root 0.00 B/s 0.00 B/s 0.00 % 98.89 % [jbd2/sda3-8]