Monitor Disk in Linux

VMSTAT

Displays system information about Processes, Memory, Swap, IO, System, CPU

• vmstat 1
  • 1 : every 1 second intervals

SAR

Collect, report, or save system activity information.

• sar

IOSTAT

Report CPU statistics and input/output statistics for devices

• iostat -y 5
  • -y :  Omit  first  report  with  statistics since system boot
  • 5 : Display a continuous device report at five second intervals.

IOTOP

Display real-tie disk activity

• iotop -o
  • -o : Only show processes or threads actually doing I/O

DSTAT

User-friendly version of iostat

• dstat -td 60
  • -t : timestamps
  • -d : disk statistics
  • 60 : average over 60 seconds

ATOP

AT Computing's System & Process Monitor

• atop

IOPING

Monitor I/O latency in real time

• ioping  /dev/vdb