PassMark Fragger for Windows

Overview of the tool

PassMark Fragger is a Windows utility that lets you intentionally break apart and reassemble files so you can study and control fragmentation. It gives users a hands-on way to alter file layout on disk and then restore it, making it useful for testing and optimizing file placement.

Core capabilities

• An intuitive interface that shortens the learning curve and streamlines file manipulation.
• Built-in benchmarking features to measure how other defragmenters perform under comparable conditions.
• A sandboxed environment for precise control over how files are split and rejoined on storage.
• Fine-grained settings so you can define fragmentation patterns and defragmentation behavior.
• Tools aimed at improving overall filesystem efficiency and helping diagnose I/O-related issues.

Using it to compare other utilities

Beyond creating and fixing fragmentation, Fragger can serve as a test platform. By producing repeatable fragmentation scenarios, you can run competing defragmentation programs against the same conditions and collect performance data to make an informed choice.

Why someone would choose this program

If you need predictable, repeatable fragmentation patterns—for performance tuning, software testing, or troubleshooting—Fragger provides the controls required. Its combination of ease-of-use and measurement tools makes it practical for both developers and power users who want to evaluate or demonstrate how fragmentation affects disk performance.

Suggested alternative

If you prefer a different option, consider Undelete Plus (free). It focuses on recovery and may complement or replace some use cases depending on whether your priority is file restoration rather than manual fragmentation testing.