1 # Flush caches
2 WRITEBACK_PERCENT=$(cat /sys/block/bcache0/bcache/writeback_percent)
3 sudo echo 0 | sudo tee /sys/block/bcache0/bcache/writeback_percent
4 # Watch this drop to zero
5 watch -d cat /sys/block/bcache0/bcache/cache/bdev0/dirty_data
6 sudo echo WRITEBACK_PERCENT | sudo tee /sys/block/bcache0/bcache/writeback_percent
