I had 3 4TB drives, the backuppc data store was on the first drive. On Mondays, at 8am (all driven by cron) backuppc was shutdown and I dd'ed the first drive to the second drive, it took 7 hours, then auto mounted, and started backup pc. On Wednesday drive two and three were umount and a dd from two to three ran for 7 hours, and at the end mounted and the cycle repeated weekly. The advantage of this was should a hard disk failure happen on the source disk during the dd, you always had one drive with a fully intact backuppc data store, aged a few days.
Rsync as much as I like and use this tool, is not effective for copying the backup datastore, perhaps if you have a very small days store, not my case however. Good luck, Ron On Sat, Jul 18, 2026, 08:32 martin f krafft via BackupPC-users < [email protected]> wrote: > Folks, > > I nearly lost my BackupPC machine the other day and it made me realise > that I have no backups of my backups. > > Hence, I would like to set up a mirroring of the BackupPC (v4) pool to a > remote store, client-side encrypted. > > I checked out rclone <https://rclone.org/> and it seems like the way to > go, but it does not do incremental transfers. The first backup took nearly > 10 days, and subsequent runs, which I thought would happen daily, take > longer than 24 hours, so this is not really sustainable. > > Rclone can mount a locally-encrypted, remote share, as a file system, and > I guess I could use rsync on top of that, but even rsync takes forever, > and it seems it updates existing files, which really should not be, right? > The way I understand BackupPC is that a file like > cpool/de/f0/dff07ca9d2829bc8cbfd3dcee9cad007, once written, doesn’t > change, until it’s garbage-collected. > > Running rsync against a local mount also means that files have to be > retrieved first before a delta can be computed. > > I wish BackupPC just kept track of files it created and deleted and then I > could asynchronously follow that file and copy/remote-delete away, but > there seems to be no such option. > > Hence, the way to do things would be to just send over the new files along > with their refs, and ignore everything else. And then to run a prune every > now and then and delete files that are no longer in existence. > > Is there a tool that is optimised for this task? > > What do you use to mirror your BackupPC pool to an off-site location? > > Thanks, > -- > > martin krafft | https://matrix.to/#/#madduck:madduck.net > > ”… doch warum sollte nicht jeder einzelne > aus seinem leben ein kunstwerk machen koennen?” > – michel foucault > > spamtraps: [email protected] > _______________________________________________ > BackupPC-users mailing list > [email protected] > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: https://github.com/backuppc/backuppc/wiki > Project: https://backuppc.github.io/backuppc/ >
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