On 18 Jan 2024 13:26 +0100, from r...@h5.or.at (Ralph Aichinger): > As a home/SOHO user, I'd rather have a working backup every few hours > or every day than some RAID10 wonder
Definitely agree that a solid backup regimen (including regular automated backups; at least one off-site copy _at least_ of critical, hot data; and planning for the contingency that you need to restore that backup onto a brand new system without access to anything on your current system -- think "home burns down at night" or "burglar" scenario) is the _first_ step, and one that a great deal of people still fail at. RAID is for uptime. If a week-long outage (to get replacement hardware and restore the most recent backup) and a day's worth of data loss is largely inconsequential, as quite frankly it likely is for most home users save for the cost of replacement hardware, that's a very different scenario from if that same outage costs $$€€¥¥ and could destroy your livelihood; and consequently the choices made _should_ likely be different. _Mirrored backups_ makes very little sense to me. If a storage device used for storage of backups fails prematurely, just toss it and get a new one and make a new backup. If the backup software goes haywire and starts overwriting everything with random garbage, having the garbage mirrored isn't going to help you. It's much better to have two independent backup targets and switching between them, and figuring the switching interval into your RPO. The only time when something like mirrored backups will help you is when you have only one backup set, the backup itself works fine, but a backup drive fails, _and_ the source fails before you've been able to make a new backup. That's a _very_ narrow scenario and easily solved by having two backup sets. -- Michael Kjörling 🔗 https://michael.kjorling.se “Remember when, on the Internet, nobody cared that you were a dog?”
