![]() In a backup system, RAID is more about availability than it is uptime. Exactly how this “combining” happens is up to you, and can change the resilience, reliability and performance massively. RAID is a way of combining disks together to create a single “pool”. What happens if your house burns down? Or more realistic, what happens when there’s a power surge which takes out your devices? It’s for this reason at least 1 copy should be off-site, so that it’s entirely disconnected, and thus not likely to be affected. ![]() And of course, BTRFS exists.Īt least 1 copy of your data should be off-site. If your data is in Nextcloud, and you just sync your Nextcloud application, that might not be useful if Nextcloud has a catastrophic bug. ![]() This is one which is easy to forget, but very important. This one is subject to interpretation, but if you’re justifying the formats too hard, then you’re probably just lying to yourself about your data’s safety. The data should be in 2 different formats. those which are linked and synced immediately, don’t count. If it’s not in at least 3 places, it doesn’t exist. It’s for that reason the very simple 3-2-1 backup rule exists: I hope you’ll never need to, but eventually you may have to fall back on your backups, so it’s important they be as high quality and reliable as possible. If you value your data at all, it’s time to take things into your own hands! # How to backup If you’re reading this saying “But I have all my data in Google Drive, it’s perfectly safe there, right?”, wrong! Cloud storage providers will do everything they possibly can to keep your data safe, but should something catastrophic happen, they can’t be held responsible. The impact may take the form of downtime, loss of data or, much harder to recover from, loss of trust. The job of a backup isn’t to prevent failure, it’s to reduce the impact of it. You can keep telling yourself otherwise, but eventually, every system will experience some kind of failure. If you’re not backing up your data, stop reading this now, go do it, then come back…Īssuming none of you suddenly panicked and left, let’s keep going. Backups are critical to any systems longevity and reliability.
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