Script to monitor disk write times

disk-stats

#!/bin/bash

# Send stats to this file
exec  23>> stats.csv

while sleep 30; do
  date="$(date -Iseconds)"
  real=""
  user=""
  sys=""
  t="$(time -p (dd if=/dev/urandom of=stats.bin bs=1M count=1 conv=fsync &>/dev/null) 2>&1 >/dev/null)"
  echo $t |(read dummy real dummy user dummy sys && echo "$date,$real,$user,$sys") 1>&23
done