So you know how HDDs and SSDs can't retain data indefinitely?

Just copy your data to tape and write it to new tape every 20 years.

>>61962008
Sure: set two hard drives up as mirrors of each other (but NOT as a RAID) and set up a cron job to copy the entire contents of one to the other and alternate which is to and which is from. Set it to run daily or weekly or monthly or whatever you like.

Honestly though, it's a waste of time and effort. It'd take quite a few years of a drive being inactive for the magnetisation of disk sectors fading to being unreadable to become anywhere near likely enough to worry about. Besides, if you're regularly backing up to another medium (which you are anyway, if you're as concerned about data integrity as the question implies), it's not a problem at all.

>>61962008
Use 32MB memory Cards

Hire an autistic to write out hardcopy of the binary. Buy a warehouse.

>>61962008
Just laser etch your data in PVC

>>61962358
I do this on only stuff that would be a pain in the ass / impossible to get back like pictures, music, documents or server settings.

>>61962137
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>>61962008

It's called backing up your data. And RAID != backup.

>>61963082
So limit its scope to those things. The answer remains the same.