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hxorr a day ago

I also seem to remember reading retention is proportional to temperature at time of write. Ie, best case scenario = write data when drive is hot, and store in freezer. Would be happy if someone can confirm or deny this.

pbmonster 19 hours ago | parent | next [-]

I know we're talking theoretical optimums here, but: don't put your SSDs in the freezer. Water ingress because of condensation will kill your data much quicker than NAND bit rot at room temperature.

cesaref 13 hours ago | parent | next [-]

I'm interested in why SSDs would struggle with condensation. What aspect of the design is prone to issues? I routinely repair old computer boards, replace leaky capacitors, that sort of thing, and have cleaned boards with IPA and rinsed in tap water without any issues to anything for many years.

Aurornis 11 hours ago | parent [-]

Condensation == water. Water leads to corrosion.

dachris 19 hours ago | parent | prev | next [-]

Would an airtight container and liberal addition of dessicants help?

pbmonster 18 hours ago | parent | next [-]

Sure. Just make sure the drive is warm before you take it out of the container - because this is when the critical condensation happens: you take out a cold drive an expose it to humid room temperature air. Then water condenses on (and in) the cold drive.

Re-freezing is also critical, the container should contain no humid air when it goes into the freezer, because the water will condense and freeze as the container cools. A tightly wrapped bag, desiccant and/or purging the container with dry gas would prevent that.

mkesper 16 hours ago | parent [-]

A vacuum sealer would probably help to avoid the humid air, too.

mort96 8 hours ago | parent [-]

Only if you wait for the drive to heat up before you remove the vacuum seal.

Aurornis 10 hours ago | parent | prev [-]

Be careful, airtight doesn’t mean it’s not moisture permeable over time.

Color changing desiccant is a good idea to monitor it.

Onavo 19 hours ago | parent | prev [-]

What about magnetic tape?

pbmonster 19 hours ago | parent [-]

For long term storage? Sure, everybody does it. In the freezer? Better don't, for the same reason.

There are ways to keep water out of frozen/re-frozen items, of course, but if you mess up you have water everywhere.

userbinator a day ago | parent | prev | next [-]

That's probably this: https://www.sciencedirect.com/science/article/abs/pii/S00262...

CarVac a day ago | parent | prev [-]

I definitely remember seeing exactly this.