iotop

• iotop -b -P -o -d 1

Total DISK READ :      19.57 K/s | Total DISK WRITE :       8.44 M/s
Actual DISK READ:      19.57 K/s | Actual DISK WRITE:      14.10 M/s
  PID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN      IO    COMMAND
  230 be/4 root        0.00 B/s   19.57 K/s  0.00 % 54.53 % [kjournald]
16850 be/4 mysql      19.57 K/s    8.42 M/s  0.00 %  2.84 % mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306