sync
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches
mount -o sync -t ext3 /dev/sda1 /mnt/foo
mount -o remount,sync /mnt/foo
vmtouch -v server.tar.gz server.tar.gz [ ] 0/2 Files: 1 Directories: 0 Resident Pages: 0/2 0/8K 0% Elapsed: 5.8e-05 seconds