Clone partition table:
sgdisk --backup=table.sgdisk /dev/nvme0n1
sgdisk --load-backup=table.sgdisk /dev/nvme1n1

Clone partitions (ESP, root, etc):
dd if=/dev/nvme0n1pX of=/dev/nvme1n1pX bs=4M status=progress

Mount target system:
mount /dev/nvme1n1p3 /mnt
mount /dev/nvme1n1p1 /mnt/boot
mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt

Reinstall systemd-boot:
bootctl install

Update boot entry:
blkid # get UUIDs
nano /boot/loader/entries/steamos.conf # update root=UUID=

Optional: update /etc/fstab if UUIDs changed

Oprindeligt skrevet af Nicusor Dan:

Clone partition table:
sgdisk --backup=table.sgdisk /dev/nvme0n1
sgdisk --load-backup=table.sgdisk /dev/nvme1n1

Clone partitions (ESP, root, etc):
dd if=/dev/nvme0n1pX of=/dev/nvme1n1pX bs=4M status=progress

Mount target system:
mount /dev/nvme1n1p3 /mnt
mount /dev/nvme1n1p1 /mnt/boot
mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt

Reinstall systemd-boot:
bootctl install

Update boot entry:
blkid # get UUIDs
nano /boot/loader/entries/steamos.conf # update root=UUID=

Optional: update /etc/fstab if UUIDs changed

Thank you mate i will try that next
but im using partclone and other tools now todo a full system back into a .img.xz with the 8 partitions so will see after

ddrescue should make a proper clone.

Make an empty "mapfile" (call it whatever, mapfile is fine) on the USB stick of your live distro. Mapfile is kind of a log file used in case errors occur, used for recovery attempts, but that's the case of a bad disk. In your case, the map file should be empty or relatively small (a header or something), that's why it will fit on your USB or ramdisk, if you boot in RAM.

https://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Examples

The first example should do it.

Later Edit: It won't be fast, though. The whole disk is being cloned. There are some examples on cloning partitions, but that won't copy any kind of file system headers.

Oprindeligt skrevet af Pepe:

ddrescue should make a proper clone.

Make an empty "mapfile" (call it whatever, mapfile is fine) on the USB stick of your live distro. Mapfile is kind of a log file used in case errors occur, used for recovery attempts, but that's the case of a bad disk. In your case, the map file should be empty or relatively small (a header or something), that's why it will fit on your USB or ramdisk, if you boot in RAM.

https://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Examples

The first example should do it.

Later Edit: It won't be fast, though. The whole disk is being cloned. There are some examples on cloning partitions, but that won't copy any kind of file system headers.

Okay ill take that info problem is i cant find nothing that supports cloning these fat16 partitions and the user above suggested things for debian without asking what im on 😅🤦‍♂️

Oprindeligt skrevet af Nicusor Dan:

Clone partition table:
sgdisk --backup=table.sgdisk /dev/nvme0n1
sgdisk --load-backup=table.sgdisk /dev/nvme1n1

Clone partitions (ESP, root, etc):
dd if=/dev/nvme0n1pX of=/dev/nvme1n1pX bs=4M status=progress

Mount target system:
mount /dev/nvme1n1p3 /mnt
mount /dev/nvme1n1p1 /mnt/boot
mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt

Reinstall systemd-boot:
bootctl install

Update boot entry:
blkid # get UUIDs
nano /boot/loader/entries/steamos.conf # update root=UUID=

Optional: update /etc/fstab if UUIDs changed

It dont evan work have you evan tested your method there is no mount points for dev ect in the partitions you clearly missed stuff like pts but overall your are partially correct .....

Oprindeligt skrevet af Nicusor Dan:

Clone partition table:
sgdisk --backup=table.sgdisk /dev/nvme0n1
sgdisk --load-backup=table.sgdisk /dev/nvme1n1

Clone partitions (ESP, root, etc):
dd if=/dev/nvme0n1pX of=/dev/nvme1n1pX bs=4M status=progress

Mount target system:
mount /dev/nvme1n1p3 /mnt
mount /dev/nvme1n1p1 /mnt/boot
mount --bind /dev /mnt/dev
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt

Reinstall systemd-boot:
bootctl install

Update boot entry:
blkid # get UUIDs
nano /boot/loader/entries/steamos.conf # update root=UUID=

Optional: update /etc/fstab if UUIDs changed

Your method dont work ... .