mrmichalis

watch --difference=cummulative --interval=1 '(echo device read_IOs read_merges read_sectors read_ticks write_IOs write_merges write_sectors write_ticks in_flight io_ticks time_in_queue; for file in /sys/block/*/stat; do echo -n $file; cat $file; done) | column -t'
# OUTPUTS:
#device                 read_IOs  read_merges  read_sectors  read_ticks  write_IOs  write_merges  write_sectors  write_ticks  in_flight  io_ticks  time_in_queue
#/sys/block/dm-0/stat   116962    0            2212746       314096      7705653    0             150218536      609670232    0          644428    610921004
#/sys/block/dm-1/stat   116479    0            2208882       313324      7686986    0             150218536      609676068    0          644616    611418072
#/sys/block/dm-2/stat   302       0            2416          780         0          0             0              0            0          148       780
#/sys/block/sda/stat    91181     26273        2217246       74876       7314854    388030        150261802      16954364