Add 'ioping'

$ ioping .
4.0 KiB from . (ext4 /dev/disk/by-label/240gb): request=1 time=342 us
4.0 KiB from . (ext4 /dev/disk/by-label/240gb): request=2 time=914 us
4.0 KiB from . (ext4 /dev/disk/by-label/240gb): request=3 time=411 us
^C
--- . (ext4 /dev/disk/by-label/240gb) ioping statistics ---
3 requests completed in 2.3 s, 1.8 k iops, 7.0 MiB/s
min/avg/max/mdev = 342 us / 555 us / 914 us / 254 us