I would like to make manual backups of an SD card as a disk image so that it can be easily recreated when needed. I’d like to keep a few versions in case there is a problem I didn’t know about, it can be rolled back.

How can I do this incrementally, or with de-duplication, so that I don’t have to keep full copies of the complete SD card? It’s very big but most of the content won’t be changing much.

It’s for MiyooCFW ROM which is on FAT 32-formatted micro SD card.

Thanks for your help! Also let me know if I am going about the problem in a wrong way.

  • chameleon@fedia.io
    5·
    4 months ago

    Easiest way would be to use borg create --read-special --chunker-params fixed,4194304 '/home/user/sdcardbackup::{now}' /dev/sdX (which I copied from the examples in the documentation). I’m not sure if Vorta has a way to activate --read-special but I suspect not; you can most likely still use it to make the repo and manage archives inside of it though.

    Backing up from a command/stdin might also be relevant as an alternative, since that lets you back up more or less anything.

    • danA
      4·
      4 months ago

      Wow I love this - I never thought of directly backing up block devices like that.