FEB26 :TRICK ursprünglich von 2 TB blockweise auf loop device speichern 
und als laufwerk speichern. und dann mounten um nur teile aus image auszulesen ohne kompleet auf urprungliche Platte zurückspielen zu müssen,  

1. loop device restore.ing anlegen :
ronny@lggram:~/Backup$ sudo losetup -fP restore.img
2.)check

ronny@lggram:~/Backup$ losetup -a
/dev/loop64: []: (/home/ronny/Backup/restore.img)
/dev/loop26: []: (/var/lib/snapd/snaps/gnome-46-2404_125.snap)
/dev/loop54: []: (/var/lib/snapd/snaps/gnome-46-2404_145.snap)
/dev/loop16: []: (/var/lib/snapd/snaps/simple-scan_798.snap)
/dev/loop44: []: (/var/lib/snapd/snaps/mesa-2404_912.snap)
/dev/loop7: []: (/var/lib/snapd/snaps/core_17272.snap)
/dev/loop34: []: (/var/lib/snapd/snaps/qt515-core20_44.snap)
/dev/loop62: []: (/var/lib/snapd/snaps/snapd_25577.snap)
sudo partclone.ext4 -C -r -s /home/ronny/Backup/nvme1n1p1.ext4-ptcl-img -o /dev/loop64
Partclone v0.3.13 http://partclone.org
Starting to restore image (/home/ronny/Backup/nvme1n1p1.ext4-ptcl-img) to device (/dev/loop64)
Calculating bitmap... Please wait...
done!
File system:  EXTFS
Device size:    2,0 TB = 488378368 Blocks
Space in use: 276,5 GB = 67515612 Blocks
Free Space:     1,7 TB = 420862756 Blocks
Block size:   4096 Byte
write block 91750230 ERROR:Auf dem Gerät ist kein Speicherplatz mehr verfügbar  
Partclone fail, please check /var/log/partclone.log !1,96%,  18,41GB/min,       
ronny@lggram:~/Backup$ 30, total block:  488378368, Complete:  18,79%      

Fehlgeschlagen . 





https://partclone.org/usage/

ist installiert 
Clonezilla benutzt das selbe https://de.wikipedia.org/wiki/Clonezilla
https://clonezilla.org/liveusb.php#linux-method-a


partclone.[fstype]
The man page is for all utilities name with end of [xxx]fs, e.g. reiserfs. All file systems share the same options and features.
partclone.restore
The special man page for restore only.
partclone.dd
The special man page for partclone.dd only.
partclone.chkimg
The special man page for partclone.chkimg only.
partclone.info
The special man page for partclone.info only.

https://wiki.archlinux.org/title/Partclone
Installation
Install the partclone package.

Using Partclone with an ext4-formatted partition
Without compression
To backup without compression:

# partclone.ext4 -c -s /dev/sda1 -o ~/image_sda1.pcl
To restore it:

# partclone.ext4 -r -s ~/image_sda1.pcl -o /dev/sda1
With compression
To backup with compression:

# partclone.ext4 -c -s /dev/sda1 | lz4 -z > ~/image_sda1.pcl.lz4
Tip
For maximum compression use lz4 -z -12, or experiment with other compression tools.
To restore it:

# lz4 -d -c ~/image_sda1.pcl.lz4 | partclone.ext4 -r -o /dev/sda1