Linux

48331 readers

618 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

nooter692@lemmy.ml

MarcellusDrum@lemmy.ml

cypherpunks@lemmy.ml

cyclohexane@lemmy.ml

d3Xt3r@lemmy.nz

backups for SD card disk image? that don't take up tonnes of space and can be rolled back? (lemmy.world)

submitted 3 months ago by RedSquadCampFollower@lemmy.world to c/linux@lemmy.ml

14 comments fedilink hide all child comments

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.

you are viewing a single comment's thread
view the rest of the comments

[–] tkk13909@sopuli.xyz 9 points 3 months ago (2 children)

If it's a filesystem, it can be backed up using BorgBackup. There are a few different clients but I personally use Vorta on Linux.

[–] dan@upvote.au 4 points 3 months ago

+1 Borgbackup is great, and its deduplication works very well. Vorta works well, and there's also GNOME Pika which has a very simple UI. For servers, I use Borgmatic.

[–] RedSquadCampFollower@lemmy.world 2 points 3 months ago (1 children)

@tkk13909@sopuli.xyz @dan@upvote.au

Borg backup has insane deduping. The first time I used it I thought it was broken because of how much smaller the backup was compared to the original. I used it with vorta GUI.

I am not sure how to combine the task of making a disk image with backing up with borg either on the command line or via one of the GUIs?

[–] chameleon@fedia.io 5 points 3 months ago (1 children)

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.

[–] dan@upvote.au 4 points 3 months ago

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