fatrace.txt

Is there a tool like iotop but for monitoring IO on specific volumes? 
https://unix.stackexchange.com/questions/72027/iotop-but-for-particular-disk/701656#701656

Check out `fatrace`

For example, cd into the partition you want to (in my case, mount point /hdd) monitor and run

sudo fatrace -c -t

Then, for example a touch /hdd/x will show:

16:11:05.278541 touch(179482): + /hdd
16:11:05.278541 touch(179482): CWO /hdd/x

Details:

Usage: fatrace [options...] 

Options:
  -c, --current-mount       Only record events on partition/mount of current directory.
  -o FILE, --output=FILE    Write events to a file instead of standard output.
  -s SECONDS, --seconds=SECONDS Stop after the given number of seconds.
  -t, --timestamp       Add timestamp to events. Give twice for seconds since the epoch.
  -p PID, --ignore-pid PID  Ignore events for this process ID. Can be specified multiple times.
  -f TYPES, --filter=TYPES  Show only the given event types; choose from C, R, O, or W, e. g. --filter=OC.
  -C COMM, --command=COMM   Show only events for this command.
  -h, --help            Show help.