Clonezilla

The Free and Open Source Software for Disk Imaging and Cloning
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Restore disk image : Restore an image on 2nd disk (sdb) to 1st disk (sda) (Step by step)
  1. Boot the machine via Clonezilla live
  2. The boot menu of Clonezilla live
  3. Here we choose 800x600 mode, after pressing Enter, you will see Debian Linux booting process
  4. Choose language
  5. Choose keyboard layout
  6. Choose "Start Clonezilla"
  7. Choose "device-image" option
  8. Choose "local_dev" option to assign sdb1 as the image home
  9. Select sdb1 as image repository, then choose "restoredisk" option
  10. Select image name and destination disk
  11. Clonezilla is restoring disk image on 2nd disk (sdb) to 1st disk (sda)
Boot the machine via Clonezilla live
In this example, the machine has 2 disks, 1st disk's name is sda (device name in GNU/Linux), 2nd disk's device name is sdb. We already have a Clonezilla image in sdb, the image name is called "focal-mbr-20201114":
root@debian:~# ls -lh /home/partimag/
total 28K
drwxr-xr-x 2 root root 4.0K Nov 14 02:36 Docs
drwxr-xr-x 2 root root 4.0K Nov 14 02:36 Photos
drwxr-xr-x 2 root root 4.0K Nov 14 03:05 focal-mbr-20201114
drwx------ 2 root root  16K Nov 14 01:39 lost+found
root@debian:~# ls -lh /home/partimag/focal-mbr-20201114/
total 584M
-rw-r--r-- 1 root root  870 Nov 14 03:05 Info-OS-prober.txt
-rw-r--r-- 1 root root  96K Nov 14 03:05 Info-dmi.txt
-rw-r--r-- 1 root root  236 Nov 14 03:05 Info-img-id.txt
-rw-r--r-- 1 root root  53K Nov 14 03:05 Info-lshw.txt
-rw-r--r-- 1 root root 4.7K Nov 14 03:05 Info-lspci.txt
-rw-r--r-- 1 root root  194 Nov 14 03:05 Info-packages.txt
-rw-r--r-- 1 root root   96 Nov 14 03:05 Info-saved-by-cmd.txt
-rw-r--r-- 1 root root  872 Nov 14 03:05 Info-smart.txt
-rw-r--r-- 1 root root  805 Nov 14 03:03 blkdev.list
-rw-r--r-- 1 root root  451 Nov 14 03:03 blkid.list
-rw-r--r-- 1 root root 6.1K Nov 14 03:05 clonezilla-img
-rw-r--r-- 1 root root  178 Nov 14 03:04 dev-fs.list
-rw-r--r-- 1 root root    4 Nov 14 03:04 disk
-rw-r--r-- 1 root root   10 Nov 14 03:04 parts
-rw-r--r-- 1 root root   36 Nov 14 03:03 sda-chs.sf
-rw-r--r-- 1 root root 1.0M Nov 14 03:03 sda-hidden-data-after-mbr
-rw-r--r-- 1 root root  512 Nov 14 03:03 sda-mbr
-rw-r--r-- 1 root root  385 Nov 14 03:03 sda-pt.parted
-rw-r--r-- 1 root root  350 Nov 14 03:03 sda-pt.parted.compact
-rw-r--r-- 1 root root  266 Nov 14 03:03 sda-pt.sf
-rw------- 1 root root 5.6K Nov 14 03:04 sda1.vfat-ptcl-img.gz.aa
-rw-r--r-- 1 root root  512 Nov 14 03:04 sda2-ebr
-rw------- 1 root root 583M Nov 14 03:04 sda5.ext4-ptcl-img.gz.aa
Now the image "focal-mbr-20201114" will be restored to disk sda.
Once you have the bootable Clonezilla Live CD/DVD or USB flash drive, you can boot the machine you want to clone via Clonezilla live. Remember to use the Clonezilla live CD or USB flash drive to boot the machine. For example, if you have Clonezilla Live in USB flash drive, you have to boot it via USB device (Ex. USB-HDD or USB-ZIP). If necessary, you can set the first boot priority in the BIOS as USB-HDD or USB-ZIP so that it can boot Clonezilla Live from your USB flash drive.
Here we take CD as an example. You can either set CD as first boot priority in machine's BIOS like this:


Or by pressing a hotkey (e.g. Esc or F9) when you boot the machine, you will see the boot menu of BIOS like this:


Check your motherboard manual for more details about how to boot your machine via CD.

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