Article ID : 00014806 / Last Modified : 06/23/2011Print

How to determine if a Solid State Drive supports the TRIM command.

    A TRIM command allows the operating system to inform a Solid State Drive (SSD) which blocks of data are no longer considered in use and can be erased internally. The purpose of the TRIM command is to improve the speed of SSD drives and ultimately boost the overall read and write performance. Both the operating system and the SSD firmware must support the TRIM command.


    • The TRIM command may also be referred to as DisableDeleteNotify or SSD Optimizer.
    • While the term TRIM is frequently spelled in capital letters, it is not an acronym but merely a command name.

    Follow this procedure to determine if your SSD supports the TRIM command.

    1. Click the Start button, click All Programs, click Accessories, right-click Command Prompt, and then click to select Run as administrator.

      NOTE:  This will open a Command Prompt window with administrator rights.

    2. In the Command Prompt window, type fsutil behavior query DisableDeleteNotify, and then press the Enter key.


      • If DisableDeleteNotify = 0 is displayed, the installed drive controller supports the TRIM command and it is ENABLED.
      • If DisableDeleteNotify = 1 is displayed, the installed drive controller does not support the TRIM command.