[2026 Guide] How to Download and Use ddrescue for Windows?

What Is GNU ddrescue & Can You Use It on Windows?

Before choosing a Windows setup, it helps to understand what ddrescue does and which method is appropriate for your device.

What Is GNU ddrescue?

GNU ddrescue is a free command-line disk recovery tool from the GNU Project. It is designed to rescue data from failing or unreadable storage devices by copying accessible data to another drive or an image file.

Unlike a standard copy tool, ddrescue does not stop when it encounters read errors. It skips damaged areas during the first pass and continues copying readable data. Later, it can retry failed areas to recover additional data from the source drive.

GNU ddrescue works at the block level. It creates a copy of the readable data on a drive instead of directly finding and restoring individual deleted files. After creating an image, you can mount it or use data recovery software to scan the image and extract files.

Key Features of GNU ddrescue

Ddrescue combines selective reading with resumable progress tracking, making it more suitable for difficult source devices than ordinary file-copying tools. Its main capabilities include:

• Skips unreadable areas: Ddrescue can move past read errors instead of stopping the entire copying process.
• Prioritizes readable data: An initial pass can collect accessible areas before spending more time on damaged regions.
• Records progress in a mapfile: The mapfile identifies copied, failed, and unprocessed blocks.
• Resumes interrupted operations: Ddrescue can continue from the existing image and mapfile without starting over.
• Creates drive or partition images: The resulting image can be preserved, mounted, or scanned with compatible file recovery software.
• Supports different storage media: Ddrescue can work with device types supported by the operating system kernel, including HDDs, SSDs, USB drives, memory cards, CDs, and DVDs.

Can GNU ddrescue Run on Windows?

GNU ddrescue does not have an official native Windows desktop version. However, you can still use ddrescue on a Windows computer through a Linux live USB, Cygwin, or third-party graphical tools. The best method depends on whether you need direct disk access, a simpler Windows-based setup, or a graphical interface.

For a failing drive, a Linux live USB generally provides the most direct environment. Use Cygwin for Windows-based command-line access or DDRescue-GUI if you prefer visual controls. WSL may be useful in some configurations, but it should not be presented as the default method unless direct physical-disk access has been verified.

Before Using ddrescue: Protect the Failing Drive

Before running ddrescue, prepare the source drive, destination storage, and mapfile carefully. Selecting the wrong device or writing new data to the source can make recoverable information more difficult or impossible to retrieve.

Check the Source Drive

The source must always be the damaged or unreadable device. Complete these checks before beginning:

• Do not format or initialize the source drive.
• Do not save new files to it.
• Do not run CHKDSK or another file-system repair process before creating an image.
• Close applications that may automatically access the drive.
• Record the drive's model, capacity, connection type, and serial number if available.

A file-system repair tool modifies disk structures. It may make a volume accessible again, but it can also change metadata that recovery software needs. Imaging the drive first preserves a safer working copy.

Prepare a Healthy Destination

The destination must be a separate, healthy device. If you are creating an image file, its storage location should have at least as much free space as the source device's total capacity.

For example, imaging a 1 TB source drive may require approximately 1 TB of available destination space, even if Windows shows that the source contains only 300 GB of files. The TestDisk ddrescue documentation also recommends preparing enough space for the complete image.

A safer setup uses three locations:

• Keep the failing device as the source drive.

• Use a healthy drive to store the image and mapfile.

• Save the files recovered from the image to another healthy drive.

Know When to Stop

Stop the operation if the drive shows signs of worsening physical failure:

• It clicks, grinds, beeps, or fails to spin normally.
• It disconnects and reconnects repeatedly.
• It becomes significantly slower during light reads.
• It cannot be detected consistently.

Repeated reads can place additional stress on a mechanically failing drive.

How to Use GNU ddrescue on a Windows Computer?

GNU ddrescue does not have a native Windows version. However, Windows users can run it through a Linux live USB or Cygwin. A Linux live USB is usually the safer choice for failing drives because it provides more direct access to storage devices.

Method 1. Run ddrescue From a Linux Live USB

A Linux live USB lets you use GNU ddrescue without modifying your Windows installation. It is recommended when you need to rescue data from a failing hard drive or SSD.

• Create a bootable Linux or SystemRescue USB drive on another working computer. Restart the PC, open the boot menu, select the USB drive, and start a live session.

• Connect the failing drive and a healthy destination drive. Avoid damaged cables, unstable adapters, and unpowered USB hubs. Make sure the destination has enough space for the image file.

• Use lsblk or sudo fdisk -l to view connected drives. Check the model and capacity carefully before running ddrescue. Device names such as /dev/sda and /dev/sdb may change after restarting.

• Run ddrescue with the correct source drive, image file, and mapfile location. Always verify the device names before starting.

  sudo ddrescue -f -n /dev/sdX /path/to/destination/disk-image.img /path/to/destination/rescue.map

  The -n option skips the scraping phase during the first pass. This allows ddrescue to copy easy-to-read data first. The -f option allows writing to the output file, so use it carefully.

• Review the rescued data size, read errors, remaining unread areas, and drive status after the first pass.

• If the drive is still stable, run additional passes to recover more sectors. Keep using the same source drive, image file, and mapfile.

Method 2. Run ddrescue Through Cygwin

Cygwin allows Windows users to run GNU tools without booting into Linux. However, access to physical drives may be less reliable than a Linux live USB, especially when working with failing storage devices.

• Download Cygwin from its official website. During setup, search for and install the ddrescue package. Avoid unofficial "ddrescue for Windows" downloads.

• Administrator access may be required for physical drive operations. Close programs that may automatically access or repair the source drive.

• Open Windows Disk Management to check the disk number, capacity, and partitions. Then confirm how the drive is mapped in Cygwin before running ddrescue.

• Save the image file and mapfile on another healthy drive. Never store them on the failing source drive.

• Check the process regularly. Watch for drive disconnects, unusual noises, slower speeds, or increasing read errors.

• Keep the existing image file and mapfile if the process stops. Restart ddrescue with the same paths to continue from where it stopped.

How to Use DDRescue-GUI on Windows?

DDRescue-GUI provides visual controls for choosing the source, destination, mapfile, and recovery settings. It is easier to operate than the command-line version but remains a third-party interface rather than an official GNU Windows application.

• Download and install ddrescue for Windows. Once installed, launch the program.

  
  Note:

  You need to be informed about three options; Image Source, Detailed Info, and Image Destination.

  • Image Source: This is the corrupted hard drive that needs to be recovered.
  • Detailed Info: This option provides detailed information about the recovery process. It also allows you to create a map file that helps resume recovery if interrupted. Crucially, save this map file to a separate drive for safety.
  • Image Destination: This is where the recovered data will be stored. You can choose another drive or create an image file (e.g., "recovery.img"). Ensure you have enough space and store the image file in a secure and easily accessible location".

• From the left side of the window, click on "Settings".

  

• Three presets at the bottom simplify the process. For most situations, 'Fastest' is ideal. If unsure, use 'Balanced.' For heavily damaged drives, select 'Best.' Save your preferred preset for future use.

• Click on "Start" to initiate the recovery process of the lost data.

  

• Upon successful recovery, you'll see a message indicating the completion of the process.

  

• If the recovery process was interrupted, you might encounter an error message like this:

  

• If you created a map file during the initial recovery, you can still recover more data. To resume, restart the recovery process with the same settings. However, read the input file backward and select the "Best Recovery" preset for optimal results.

  

How to Resume ddrescue with a Mapfile?

A ddrescue mapfile saves the recovery progress of a drive. It records which areas have been copied, which areas failed, and which areas still need processing. This allows ddrescue to continue an interrupted operation without starting over.

Keep the mapfile after the first imaging pass. Before resuming, check the following:

• The source drive is the same device.
• The existing image file has not been modified.
• The mapfile matches the correct image.
• The source and destination drives are not reversed.

You can try additional retry or reverse-reading passes if needed. However, these steps are not always necessary. Decide whether to continue based on the drive condition and the value of the remaining data.

What to Do After ddrescue Creates the Disk Image?

After ddrescue creates the image, stop using the original drive whenever possible. Continue the recovery process from the image to reduce additional stress on the failing drive.

Option 1. Mount the Image in Read-Only Mode

If the file system and partition structure are still working, mount the image as read-only. Then copy the accessible files to a safe location. Use a duplicate image if you need to make changes or attempt repairs.

Option 2. Scan the Image With Data Recovery Software

Use data recovery software when the image cannot be mounted or the file system is damaged. This option is also useful for RAW partitions, missing files, deleted data, or corrupted folders.

Option 3. Preserve the Source, Image, and Mapfile

Keep the original drive, image file, and mapfile until you confirm that recovery is complete. Always open important recovered files to check that the data is intact.

How to Recover Files from a ddrescue Image with 4DDiG?

GNU ddrescue creates a sector-by-sector image of a damaged drive, but it does not show or recover individual files directly. If you need to find lost documents, photos, or other files from a ddrescue image, you can use 4DDiG Data Recovery to scan the image, preview recoverable data, and restore the files without working on the failing drive again.

• Install and open 4DDiG, then select the "Disk Image" feature under Common Location.
• Select "Recover Data from Image" to find the image created by ddrescue and import it into 4DDiG. Also, confirm that you have chosen the image file rather than the failing source drive.
• After importing the image, 4DDiG will scan the image file to find recoverable data. The scan results will display detected files by categories and paths, making it easier to locate the files you need.
• Preview the found files before recovery to confirm their contents. Select the files you want to restore and save them to a different healthy drive instead of the original source drive.

FAQs About ddrescue on Windows

These answers address common questions about installing, running, and resuming ddrescue on a Windows computer.

Is GNU ddrescue available for Windows?

GNU ddrescue does not have an official native Windows desktop application. However, Windows users can run it through a Linux live USB, Cygwin, or a third-party GUI tool. The best option depends on the drive condition and your technical experience.

Is DDRescue-GUI the same as GNU ddrescue?

No. GNU ddrescue is the original command-line tool from the GNU Project. DDRescue-GUI is a separate graphical interface that makes it easier to set up and run ddrescue commands.

Is ddrescue free?

Yes. GNU ddrescue is free software released under the GNU General Public License (GPL). You can download it and view the latest information from the official GNU ddrescue website.

Can ddrescue recover deleted files?

No, ddrescue is not designed to find deleted files directly. It copies readable data from a damaged drive to another drive or an image file. You can then use data recovery software to scan the image and recover deleted files or lost partitions.

Can ddrescue repair bad sectors?

No. ddrescue cannot repair bad sectors or fix damaged hardware. It only tries to read data from damaged areas and save as much accessible data as possible.

How much storage does a ddrescue image need?

The destination drive should have enough free space to store the entire source drive image. For example, a 1 TB drive may need around 1 TB of space, even if it only contains a small amount of actual data.

Can ddrescue resume after a restart?

Yes. ddrescue can continue after an interruption if you keep the original image file and mapfile. Restart the process with the same source, destination, and mapfile. Check the drive identifiers again because they may change after a reboot.

Conclusion

You can use GNU ddrescue on Windows through a Linux live USB, Cygwin, or DDRescue-GUI. For a drive with bad sectors, create an image first and continue recovery from that image instead of repeatedly scanning the source.

Keep the image and mapfile unchanged. If the image cannot be mounted or files remain inaccessible, scan it with 4DDiG and save the recovered files to another healthy drive.