• KinNectar@kbin.run
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    10 个月前

    Actually bitcoin on a physical harddrive purchased at $50 or below stored in a safety deposit box is pretty ironclad.

      • psud@lemmy.world
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        10 个月前

        Spinning hard drives last for decades. You can pretty absolutely protect yourself by storing two with multiple copies of the key each

        • BCsven@lemmy.ca
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          10 个月前

          They are succeptible to magnetic degradation, its why you go to open a jpeg from 8 years ago and some are suddenly corrupt. You have to leave them in a RAID setup with sonething self healing like ZFS. They are way more reliable than cold storage SSD ( which can start bitrot in as little as a month) but for cold storage magnetic tape is better

          • psud@lemmy.world
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            10 个月前

            Tape is just as susceptible to magnets, though it is a more stable medium. It’s not like they’ll be exposed to significant magnetic fields though

            • BCsven@lemmy.ca
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              10 个月前

              Its not just significant magnetic field ( apparently we do have geo magnetic storms that corrupt data) it is that assigning the 1 /0 bit is not permanent. The 1 or 0 you store fades with time as it wants to lose its assigned magnetism. You might be fine for 10 years, or you might lose a critical bit corrupting a file. it is why archival experts suggest if it is critical data stored offline you need to store on two or more different mediums, because “1 copy is not a backup”. Anyway, we are getting deep in the weeds of data entropy and recovery and I think your original comment was meant as being helpful to the lay-person…whom may not actually care to much if they lose a file or two, unless it is a crypto wallet key–i would trust those M series BluRay archival format since the laser alters the disk, but printing out on paper as another copy

                • BCsven@lemmy.ca
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                  10 个月前

                  You definitly have been. I have not been so lucky. Lost various data on 10-15 year old drives ( stored in climate controlled basement ) , nothing critical, but enough to prompt me to do regular full copy off and back on process as a refresh

                  • psud@lemmy.world
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                    10 个月前

                    I probably should take another image of the 286 and diff it against the earlier backup

                    And if I time travel, I’ll put the key on a hard drive, tape, DVD, and archive quality dvd

      • explodicle@local106.com
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        10 个月前

        That was a lot more difficult before BIP39 seed phrases were invented. You could of course write down anything, but there would’ve been a lot of room for error.