On Sun, Jul 17, 2022 at 10:15 AM Dotan Shavit <do...@shavitos.com> wrote:
> Consider raid + zfs + daily snapshoots > > RAID/ZFS/replication are NOT backups. This is a common problem that needs explaining every time :) https://www.raidisnotabackup.com/ > בתאריך יום א׳, 17 ביולי 2022, 16:50, מאת Shlomo Solomon < > shlomo.solo...@gmail.com>: > >> I recently lost some files because of a bad disk - hardware problem. >> >> I do regular backups so I was not really worried, but I now see that I >> have a problem with my backup strategy so I'd like to know how others >> handle/prevent what happened to me. >> >> I backup files using rsync and I basically have 2 types of backups. >> >> My most important files are backed up every night. I do incremental >> backups using: rsync -aqrlvtogS --ignore-errors --backup >> I keep about 4 months of backups. So if a file is damaged, >> missing or accidentally deleted, I can find a good file - even if, for >> example I screwed up the file and only discovered the problem a few >> days later. >> >> BUT, all the rest of my files - music, videos, pictures, etc are backed >> up daily and weekly on 2 different physical drives using: >> rsync -qrlvtogS --delete --ignore-errors >> I use --delete to prevent accumulating garbage on my backup disks. >> >> So here's the problem: Because of a hardware problem, several files on >> one of my disks were lost. As a result, the daily backup script >> "thought" that those files should be deleted from the daily backup. >> Unfortunately, I did not notice the problem. A few days later, those >> same files were also deleted from the weekly backup. So they are lost. >> >> So on one hand, I need --delete to avoid keeping backups of old >> garbage, but on the other hand, the --delete option does not know if I >> deleted the file or if it's gone because of a hardware problem. >> >> >> >> -- >> Shlomo Solomon >> http://the-solomons.net >> Claws Mail 3.17.5 - KDE Plasma 5.18.5 - Kubuntu 20.04 >> >> _______________________________________________ >> Linux-il mailing list >> Linux-il@cs.huji.ac.il >> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >> > _______________________________________________ > Linux-il mailing list > Linux-il@cs.huji.ac.il > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >
_______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
