Data backup, synchronization and recovery

Rescue when data is lost

Data loss may be caused by a variety of reasons, such as hard drive failure, accidental file deletion, virus attack or system crash, etc. When faced with data loss, here are some rescue steps and suggestions:

1. Stop using the affected device

If you notice data is lost, stop using the device immediately to prevent new data from overwriting the lost data. This is crucial for data recovery.

2. Check backups

First, check if a backup is available. If so, you can restore data directly from the backup.

• Check cloud backups (e.g. Google Drive, Dropbox, etc.)
• Check external hard drive or USB drive for backup
• If using backup software, confirm the integrity of the backup

3. Use data recovery software

If there is no backup, you can try to use data recovery software to recover the lost files. Common data recovery software includes:

• Recuva
• EaseUS Data Recovery Wizard
• Stellar Data Recovery
• Disk Drill

Please follow the software's instructions for scanning and recovery.

4. Contact professional data recovery services

If the data cannot be retrieved using the above methods, consider seeking help from a professional data recovery service. These professional companies often have advanced tools and techniques that allow them to recover data more efficiently.

5. Prevent future data loss

To avoid data loss in the future, it is recommended to take the following measures:

• Back up important data regularly, including in the cloud and external storage devices.
• Use antivirus software and scan your system regularly.
• Avoid downloading suspicious files or clicking unknown links.
• Perform system updates to ensure your operating system and applications are up to date.

in conclusion

Losing data can be frustrating, but with the proper steps and measures, you can increase your chances of getting it back. Regular backups and increased security awareness are the best ways to prevent data loss.

Clonezilla system backup and restore tool

Introduction

Clonezilla is a free and open source disk image backup and restoration tool that supports complete copying of an entire disk or a single partition and is suitable for system migration, backup and disaster recovery.

Main features

• Supports multiple file systems (ext4, NTFS, FAT32, HFS+, etc.)
• Supports BIOS and UEFI boot modes
• Supports multiple backup paths such as local storage, SSH, Samba, NFS, mounted external hard drives, etc.
• Provides text interface operation (TUI) with clear guidance on the operation process

Clonezilla version

• Clonezilla Live: For personal computer use, make a bootable disk to start
• Clonezilla SE(Server Edition): Suitable for mass deployment (PXE network boot)

Download and create boot disk

1. Download the ISO image:https://clonezilla.org
2. Use Rufus, Ventoy or balenaEtcher to write the ISO to USB and create a bootable disk
3. Restart your computer and set it to boot from USB

Common uses

1. Back up the entire hard drive

device-image → local_dev → select storage path → savedisk → select source disk

This operation will back up the entire hard drive as an image file and store it in the specified location.

2. Back up a single partition

device-image → local_dev → select storage path → saveparts → select partition

3. Restore backup

device-image → local_dev → select storage path → restore → select image and target disk/partition

4. Direct disk-to-disk copy

device-device → disk_to_local_disk → Select source and target disks

This operation directly copies data to another disk without going through the image file.

Things to note

• The target disk data will be cleared during backup and restore, be sure to confirm
• It is recommended to use an external storage device to save image files
• The boot mode must be consistent with the original system (BIOS vs UEFI)
• It is recommended to provide sufficient disk space when storing images, especially for full disk backup.

Conclusion

Clonezilla is a professional and stable system backup tool suitable for personal and corporate use. Although the operation interface is pure text, the guidance is clear and the learning curve is low. It is recommended to familiarize yourself with the process in a virtual machine or test environment before using it officially.

rsync

rsyncIt is a command line tool for file and directory synchronization, which can transfer files between local and remote systems. It uses an incremental method and only transmits changed data blocks, which is efficient and suitable for backup and synchronization operations.

Basic usage

Basic syntax:

rsync [options] source target

example:

rsync -av /path/to/source/ /path/to/destination/

This command will/path/to/source/content copied to/path/to/destination/。

Common options

• -a: Archive mode, recursively copy and retain file permissions, timestamps, etc.
• -v: Show detailed information.
• --delete: Delete archives in the target that do not exist in the source.
• -z: Compress data during transmission.
• -P: Shows progress and can resume interrupted transmissions.

remote transmission

Archives can be transferred via SSH:

rsync -av -e ssh /path/to/source/ user@remote_host:/path/to/destination/

This command will change the local/path/to/source/Sync to remote server.

Incremental backup example

use--deleteand--backupoption to make incremental backups and keep backups of deleted files:

rsync -av --delete --backup --backup-dir=/path/to/backup /path/to/source/ /path/to/destination/

more help

runrsync --helpView all options.

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