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TRIM Overview


Last Reviewed: 13-Oct-2017
Article ID: 000016148

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What is TRIM?

TRIM is an attribute of the ATA Data Set Management Command. The TRIM function improves compatibility, endurance, and performance by allowing the drive to do garbage collection in the background. This collection eliminates blocks of data, such as deleted files.

How do I use TRIM?

Windows 7*, Windows 8*, Windows 8.1*, Windows Server 2008*, and Windows Server 2012* have the TRIM command enabled by default.

If you are using Windows XP* or Vista*, the Intel® SSD Optimizer identifies deleted files, and communicates that information to the SSD. Intel SSD Optimizer is part of the Intel® SSD Toolbox.

For TRIM to function, both the SSD and operating system must support TRIM, and be enabled in the operating system.

Note Only SSDs with drive lithography of 34 nm (G2) or newer support the TRIM command. 50-nm SSDs are not supported.
What are the requirements for TRIM?
  • An Intel® Solid State Drive (Intel® SSD), with drive lithography of 34 nm (G2) or newer.
  • Installation of the Intel SSD Toolbox.
  • Instructions and download for the Intel® Solid State Drive firmware update tool are available on Download Center.
  • The Intel® Rapid Storage Technology driver version 9.6 or later, as long as the SSD is not part of a RAID array.
  • Disable scheduled defragmentation to avoid background defragmentation running at the same time as the Intel SSD Optimizer.
  • Disable the SuperFetch feature.
  • Enable Microsoft Volume Shadow Copy Service* (VSS) to run the Intel SSD Optimizer. Follow the steps for your operating system:

    Windows XP

    1. Click Start > Control Panel > Administrative Tools > Services.
    2. Scroll down and double-click Volume Shadow Copy.
    3. Go to Startup Type and select Automatic to enable VSS each time you start Windows.
    4. Click Start to begin VSS now.

    Windows Vista

    1. Click Start and type Services in Start Search box, and press Enter.
    2. Double-click Volume Shadow Copy.
    3. Set Startup to Automatic.
    4. Click Start to begin VSS now.

    Windows 7

    1. Click Start and type Services in Search Programs and Files box.
    2. Click Services.
    3. Double-click Volume Shadow Copy.
    4. Set Startup to Automatic.
    5. Click Start to begin VSS now.
Is TRIM supported on RAID configuration?

Yes. Trim functionality in RAID 0 is supported with Intel® Rapid Storage Technology (Intel® RST) version 11.0 or greater, beginning with the Intel® 7 Series chipset.

The latest version of the Intel® Solid-State Drive Toolbox enables you to optimize the performance of an Intel® SSD. You can also use a recent version of Microsoft Windows* or Linux*, that automatically enables TRIM.

How do I check to see if TRIM is enabled?

You can use the Intel® Solid State Drive Toolbox to view the drive attributes:

  1. Open the Intel® Solid State Drive Toolbox.
  2. Click Export.
  3. Save the .csv file and open it in an appropriate tool, such as Microsoft Office Excel*.
  4. Find Word 169 and check the value for Bit 0 - Data Set Management Supported.
  • If the Hex Value is 1, the drive supports TRIM.
  • If the Hex Value is 0, the drive does not support TRIM1.

1 The 34-nm series Intel® Solid State Drive (Intel® SSD) drives with firmware 02G9 show the Hex Value as 0 because this firmware version does not support TRIM.

Note If the drive does not support TRIM, check to see if a firmware update with this feature is available.

You can also heck the operating system to see if TRIM is enabled:

  1. Open a Command Prompt as Administrator.

    1. Go to Start > All Programs > Accessories.
    2. Right-click Command Prompt and click Run as Administrator.
  2. At the prompt, type %root%:\>fsutil behavior query disabledeletenotify.

    DisableDeleteNotify = 1 (Windows TRIM commands are disabled)
    DisableDeleteNotify = 0 (Windows TRIM commands are enabled)

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