What do people use for a shelf-stable backup
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Having actual prints has always been the consensus among activists. No digital media lasts as long. The media may persist but the technology to read them is long gone.
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After reading the previous discussion I think that you should get more than single drive to store cold backups. That way you can at least spread out the risk of single drive failing. 2TB spinning drives are pretty cheap today and if you have, for example, 4 of them, you can buy one now, write your backups to it and in 6 months buy another, write data on that and so on.
This way you'll have drives with year or two difference on purchase date, so it's pretty unlikely all of them fail at once and a single drive gets powered on and checked every other year or so. My personal experience is that spinning drives are pretty stable on the shelf, but I wouldn't rely on them for decades. And of course even with multiple drives you'll still want to replace them every 3-5 years each. Plus with multiple drives, if I were to build setup like that, I'd set up some sort of scripts or other solution where I can just plug the thing in and doubleclick an icon on desktop to refresh the data and maybe get a notification automatically that the drive you're using should be replaced.
And for actual, long term storage, printouts are the way to go. At least in here you can get books made out of photo paper with your pictures. That's one media which is actually stable over long period and using them doesn't require a lot of technical knowledge nor hardware. But I'd still keep digital copies around, as the printouts aren't resistant to things like house fire or water damage.
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I'm thinking of using a HDD and keeping it at work, which is climate controlled. I'd bring it back every few months to sync the latest.
Since it's constantly being used, I'm pretty confident it'll be usable as a backup if my NAS fails, so it only needs to be "shelf stable" for a few months at a time. If you're retired or something, a safe deposit box at your local bank should do the trick.
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If it's powered off, you'll have no idea when it dies. And they do die just sitting there.
I've actually had more failures of drives sitting around than ones running constantly.
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Cloud can be surprisingly cost effective, as part of a 3-2-1 backup.
Check out storj.io
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But I will because it won't work the next time I take it home to sync. The chance that it'll fail during the few months between a sync and an emergency is incredibly low.
I wouldn't leave it on a shelf for years, just a few months at a time (approximately quarterly).
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Exactly. I have a document for my SO that describes what to do if I pass (where the money is, how the WiFi is set up, various important accounts, etc). It's not a will (nothing about who gets what, though that's assumed by the state to be my SO, or my kids equally if we pass together), just a document that explains the stuff I handle.
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How can I tell if individual files get corrupted?
Checksums. A good filesystem will do this for you, but you can do it yourself if you want.
If you sync a drive with rsync or something periodically, it'll replace files with different checksums, fixing any corruption as you go. Then smart tests should tell you if there's any corruption the drive is aware of. I'm sure automated backup tools have options for this.
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That could probably work.
Were it me, I'd build a script that would re-hash and compare all the data to the previous hash as the first step of adding more files, and if the data comes out consistent, I'd copy the files over, hash everything again, save the hash results elsewhere and then repeat as needed.
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Oh shit you're right. Argh ok I'm going to have to rethink that. Two drives and something to compare against each other to check for errors. I'm not sure about FAT32 as there are some multi-GB video files. Shit.
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I don't want to sort through the 50k photos, and can't print videos. I'm hoping in 10 or 20 years I'll be able to feed it into AI to spit out all the best ones, then I'll consider it.
We do have photos printed, but only a very small percentage of the total.
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I have such a document, but it's not quite the same. I'm just as worried about my dumb ass losing the borg key and all data along with it...
I'm thinking a clearly labelled hard drive with instructions, rotating the hard drive with a new one every 5 years or so.
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I have a cloud backup, so this isn't about a critical loss of data. It's about an accessible copy that isn't encrypted and a layman could get the data off.
If my house burns down and I lose the copy, I can restore the data from the cloud backup (so long as I'm not in the house when it burns).
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Yeah I think I should do something like this. I really want to make sure the files are not getting corrupted in storage without me knowing.
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Just a hdd in usb caddy? IMHO good enough for 4 tier backup.
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Yes this seems to be the general theme. Main issue is sorting out a file system. I can use a self-repairing one, to recover from long term storage issues, but then it likely won't work in Windows which it may need to if I want a layman to be able to access it. So still some refinement of the plan but it's coming together.
I've also decided to print some physical photos, aiming for 100 per year, and will put everything in a container together. The physical photos are for in case the container is lost for decades and the drives die, then there will at least be something.
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exFAT is a newer and viable alternative to FAT32, with better size limits and some pretty good cross-platform capabilities. That said, if your primary access is through Windows, NTFS may have some better features and is at least read-only on other platforms.
