The original post: /r/datahoarder by /u/Distinct-Yoghurt5665 on 2024-05-31 17:37:44.
I really hope it's ok to ask this. From the rules and the wiki it does seem ok, but I'm new to this sub.
So currently I have two external SSDs for my home server. I'm using SSD_A to save all my stuff to it and SSD_B as a backup.
Now in the near future my SSD_A will be full. So I want to do the following: I want to buy a very large HDD use that as a backup and then use the two SSDs as my standard mounts for the home server to save stuff to.
Ideas
- I could use mergerfs to combine both external SSDs to one mount point. I need to to this for some of my applications.
- I could then use rsync to create my backups from the SSD-mergerfs-mount to the HDD.
- Hopefully there is an rsync flag to indicate that I do not want to sync already existing data again (even if it changed). This ensures that broken files will not overwrite healthy files on the HDD. Yes, I know that this means that changes to files won't be backed up but this is ok for my use case.
- I could use ext4 for all drives, cause there is no reason not to and I do not know anything else.
What do the experts think? Does that sound like a good approach? Could anything go wrong? I do not care about write speed to the SSDs they are fast enough I do not need striping. I also do not care if some data gets lost between the back up cycles so I do not need RAID.
Is mergerfs the best there is and is it easy to set up?
Should I use anything else then ext4? ext4 has always been my go to and I do not really see anything wrong with it. File hashes seem to be unnecessary cause I can just not overwrite existing files, that seems to do the trick for my use case.
Very much appreciate any feedback on my plan.