iostat
From Wikipedia, the free encyclopedia
iostat (input/output statistics) is a computer system monitor tool used to collect and show operating system storage input and output statistics.
It is often used to identify performance issues with local disks or networked file systems such as NFS.
The iostat tool is available on most UNIX and Unix-like operating systems, such as FreeBSD, Linux or Solaris. The syntax and output of iostat often differs slightly between different operating systems.