Clonezilla Live: Clone or Back Up a Disk Safely

Clonezilla Live is a free, bootable disk-imaging environment for backing up or cloning an individual computer. Use it when you need a sector-aware disk image or a disk-to-disk copy, but do not treat it as a one-click Windows app: selecting the wrong destination can overwrite the wrong drive.

Quick Answer

Download the current Clonezilla Live build from the official site, create boot media using its official instructions, boot the target computer, then choose device-image to save or restore an image, or device-device to copy directly between disks. Verify the source, destination, and backup before confirming any write operation.

What to Know First

• Clonezilla Live is for one computer at a time; Clonezilla Server Edition is a different network-deployment workflow.
• Disk-to-disk cloning overwrites the target drive. Copy irreplaceable files elsewhere first.
• Image-based backups need separate storage with enough free capacity. A second partition on the same failing disk is not a backup.
• Secure Boot, storage controllers, encryption, and different disk sizes can affect booting or restoring.

Download and Create Clonezilla Live USB

1. Open the official Clonezilla Live download page. Select the architecture that matches the computer, usually amd64 for modern x86-64 PCs.
2. Choose the USB package or ISO according to the official Clonezilla USB instructions. The USB setup process can erase its contents; copy needed files off it first.
3. Use the specific method documented by Clonezilla for the computer’s boot mode. Do not assume UEFI/GPT and legacy BIOS/MBR instructions are interchangeable.
4. Safely eject the USB, connect it to the computer you intend to back up, and use the one-time boot menu to start Clonezilla.

Save a Disk Image to External Storage

1. Shut down the operating system fully. Connect a separate external drive or prepare an approved network repository.
2. Boot Clonezilla Live, choose language and keyboard options, then select Start Clonezilla.
3. Select device-image to work with an image, then choose the repository type. For a local external drive, connect it when prompted and select the correct partition as the image location.
4. Choose savedisk for a whole-disk image or saveparts for selected partitions. Give the image a clear date/device label.
5. Inspect the displayed source disk name and size before confirming. Let the operation finish, then use Clonezilla’s image-check option when available and keep a second copy of important data.

The official save-disk walkthrough illustrates the menu sequence. Device labels such as sda can differ between computers; identify disks by size/model rather than relying on a remembered label.

Clone One Disk Directly to Another

Choose device-device only when you intend to replace or duplicate a drive. Select the source first and destination second, compare their capacities and model names, and stop if the target is not unambiguous. Clonezilla warns that the target’s existing data is overwritten. For a replacement drive, keep the original untouched until the new system boots and the files are checked.

When to Stop

Do not keep retrying on a drive that clicks, disconnects, overheats, or repeatedly reports read errors. Further reads can make recovery harder. If the files are valuable and no verified backup exists, power down and consult a data-recovery professional before cloning or running repair utilities.

FAQ

Does Clonezilla run inside Windows?

Clonezilla Live boots from separate media into its own Linux environment; it is not a Windows desktop cloning app.

Can I restore an image to a smaller drive?

It depends on the image, filesystem, used space, partition layout, and restore options. Do not assume a smaller target will work; consult the current official documentation and maintain another backup.

Does Clonezilla replace a regular file backup?

No. A disk image is useful for system recovery, while a separate file backup is easier for restoring individual documents. Keep both when the data matters.

Related Techmixer Guides

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• SystemRescue bootable USB guide
• Fix Guides
• Software Guides

Our Take

Clonezilla is best suited to users comfortable reading disk labels and confirming destructive steps. The instructions here follow Clonezilla’s current documentation; Techmixer did not test a clone on physical hardware for this refresh.

Last reviewed: September 29, 2026.