[wzyboy]

I've always been doing "two-pass" backups to achieve "3-2-1" goal: first pass is to run BorgBackup to backup devices to my home server. The second pass is to use rclone to transfer the repos on home server to an object storage service (B2).

With rclone support built-in, the setup would be much easier.

[cl3misch]

I think this is heavily discouraged? Instead you should have multiple separate borg repos to minimize risk of misconfiguration and data corruption.

[cl3misch]

I managed to find the source for my statement:

https://borgbackup.readthedocs.io/en/stable/faq.html#can-i-c...

It is not "heavily" discouraged. But you have to pay extra attention to perform a clean copy of the borg repo's files, and ideally check both instances regularly for integrity. I would assume it's easy to forget validating the "cold storage" copy of your borg repo in practice.