The format is the tape in the drive, or the disk or whatever.

Tape existed 50 years ago: nothing modern and in production can read those tapes.

The problem is, given a big enough time window, the literal drives to read it will simply no longer exist, and you won’t be able to access even non-rotted media because of that.

As for data integrity, there’s a lot of options: you can make a md5 sum of each file, and then do it again and see if anything is different.

The only caveat here is you have to make sure whatever you’re using to make the checksums gets stored somewhere that’s not JUST on the drive because if the drive DOES corrupt itself, and your only record of the “good” hashes is on the drive, well, you can’t necessarily trust those hashes either.

So, 50 years isn’t a reasonable goal unless you have a pretty big budget for this. Essentially no media is likely to survive that long and be readable unless they’re stored in a vault, under perfect climate controlled conditions. And even if the media is fine, finding an ancient drive to read a format that no longer exists is not a guaranteed proposition.

You frankly should be expecting to have to replace everything every couple of years, and maybe more often if your routine tests of the media show it’s started rotting.

Long term archival storage really isn’t just a dump it to some media and lock it up and never look at ever again.

Alternately, you could just make someone else pay for all of this, and shove all of this to something like Glacier and make the media Amazon’s problem. (Assuming Amazon is around that long and that nothing catches fire.)

I’m using blu-ray disks for the 3rd copy, but I’m not backing up nearly as much data as you are.

The only problem with optical media is that you should only expect it to be readable for a couple of years, best case, at this point and probably not even that as the tier 1 guys all stop making it and you’re left with the dregs.

You almost certainly want some sort of tape option, assuming you want long retention periods and are only likely to add incremental changes to a large dataset.

Edit: I know there’s longer-life archival optical media, but for what that costs, uh, you want tape if at all possible.

Change your port definitions so that they’re only binding to localhost, like so:

• “127.0.0.1:8001:8001”

That’ll stop access from anywhere but the local host. You’ll have to redo your reverse proxy configuration to use 127.0.0.1 instead of whatever you’re using now, though.

Also, isn’t the preferred nomenclature actually a ‘m’lord’?

Perhaps I’ve misunderstood something.