George King wrote at about 21:20:24 +0000 on Wednesday, January 5, 2022: > Sorry if I'm breaking protocol by asking a follow-on question not > directly associated with the original but I'm interested in your hard > disk config with a RPi4. Do you have all your storage as USB hard > drives working from the 2x RPi USB3 ports? RAID or non-RAID? I notice > you say that it is only one of your backup servers so you may have a > more distributed back up approach. > My primary backup is btrfs RAID-1 SATA (2 8TB-drives, but <1TB used for BackupPC) on my Ubuntu home Dell server.
My secondary backup is on a RPI with a 1TB external Samsung SSD on a btfs filesystem (no RAID). It is slightly slower than my Dell server but has been rock solid. I think the RPI4 is a good way to go -- though I'm not sure I would be comfortable with external USB RAID due to danger of disconnecting the cables accidentally and messing up RAID sync. BTW, I am really enjoying btrfs since it has built-in checksum so that I can tell if there is FS corruption (haven't had any yet) and if there is an issue with RAID, it can use the checksum to know which drive to rely on to recover. > I've thought about RPis for a backuppc use case but never gone there > because I was thinking I would need SATA and RAID (I'm currently using a > monolithic 14Tb RAID6 arrangement) that (I thought) really needed a > motherboard. Keen to get some power saving though as the RPi4 probably > has enough juice to do the job itself, if only with respect to the > processor and the USB3 ports. > > On 05/01/2022 18:02, backu...@kosowsky.org wrote: > > One one of my backuppc servers (running on a RPI4), I get the > > following daily error: > > > > 2022-01-05 01:05:49 Running BackupPC_rrdUpdate (pid=968) > > 2022-01-05 01:05:49 admin-1 : ERROR: unknown data acquisition > > function '' > > 2022-01-05 01:05:49 Finished admin-1 (BackupPC_rrdUpdate) > > > > > > And running 'rrdtool dump /var/lib/backuppc/log/poolUsage.rrd' gives > > the same error: > > ERROR: unknown data acquisition function '' > > > > If remove '/var/lib/backuppc/log/poolUsage.rrd' and run > > BackupPC_rrdUpdate manually, the problem goes away > > #rm /var/lib/backuppc/log/poolUsage.rrd > > #sudo -u backuppc uBackupPC_rrdUpdate > > RRD updated: date 1641427200; cpoolKb 0.000000; total > > 14345328797.155273; poolKb 0.000000; pool4Kb 0.000000; cpool4Kb > > 736297088.000000 > > > > And 'rrdtool dump /var/lib/backuppc/log/poolUsage.rrd' runs without > > error. > > > > It seems that somehow the rrd file (poolUsage.rrd) got corrupted... > > > > Not sure what caused this... but > > - It might be helpful to add a more descriptive/helpful error message > > to BackupPC_rrdUpdate as this was not simple to track down > > > > - Regardless, hope this helps others who may be encountering this error > > > > > > _______________________________________________ > > BackupPC-users mailing list > > BackupPC-users@lists.sourceforge.net > > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > > Wiki: https://github.com/backuppc/backuppc/wiki > > Project: https://backuppc.github.io/backuppc/ > > > > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: https://github.com/backuppc/backuppc/wiki > Project: https://backuppc.github.io/backuppc/ _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: https://github.com/backuppc/backuppc/wiki Project: https://backuppc.github.io/backuppc/
