Download of Sysinternals Diskmon 2.01 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software is a product of Mark Russinovich.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The common filename for the program's installer is Diskmon.exe. The software lies within System Utilities, more precisely HDD Management. The most popular version among the software users is 2.0.
From the developer:
DiskMon is an application that logs and displays all hard disk activity on a Windows system.
You can also minimize DiskMon to your system tray where it acts as a disk light, presenting a green icon when there is disk-read activity and a red icon when there is disk-write activity.
You may want to check out more software, such as Sysinternals Toolbox WebDAV, Sysinternals Desktops or Sysinternals DiskView, which might be related to Sysinternals Diskmon.