# Replacing my SSD

> 2023/6/6

## Backup

Assuming an offline backup

From https://wiki.archlinux.org/title/rsync

rsync -aAXHS --exclude={"/dev/*","/sys/*","/run/*"} / /path/to/backup

`-a` = archive mode, `-rlptgoD` (recursive, links, perms, times, group, owner, devices)
`-A` = ACL attrs
`-H` = hard links
`-S` = sparse

When it is offline your `/proc` and `/media` are normally empty. I also backup the `/tmp` because the disk space is almost free nowadays.

Some tricks:

* `--info=progress2` to show a rough progress.
* `--delete` to delete bogus files at destination. Useful when restoring to an existing system but is potentially destructive.

## Change UUIDs to original ones

You can also edit the target system's `/etc/fstab` to point to new ones.

### ext4 (via `tune2fs`)

From https://www.tecmint.com/change-uuid-of-partition-in-linux/

`tune2fs -U UUID_HERE /dev/sdbX`

> This operation requires a freshly checked filesystem. Please run `e2fsck -f` on the filesystem.

### FAT32 (via `mtools`)

https://superuser.com/a/1744103

`mlabel -N abcd1234 -i /dev/sdbX ::NEWEFI`

## Fix EFI

Assume systemd-boot+GPT+UEFI on a Debian-like system. Excerpted from https://support.system76.com/articles/bootloader/:

for i in dev dev/pts proc sys run; do sudo mount -B /$i /mnt/$i; done
sudo chroot /mnt
apt install --reinstall linux-image-generic linux-headers-generic
update-initramfs -c -k all
exit
sudo bootctl --path=/mnt/boot/efi install

You can review/modify the current boot order with `efibootmgr`.