SSDs do automatic scrubbing, i.e. a sort-of self-refresh when powered. They do it only for cells that have gotten weak. No idea how long that takes though.
You should be able for force a full test cycle by either reading the full SSD or by running a long SMART self-test.
Depending on the data, that is a perfectly valid approach. Example: Root CA secret key. Make sure to use pigmented, non-acidic ink or laser.
Probably low-stability dye. CD-R can be made very cheaply.
It depends on the quality of the dye layer, the quality of the coating and other factors. For DVD recordables, same thing. The exception is DVD-RAM which use phase-change and can theoretically be archive-grade. But everything has to work for that. I tried with some and apparently disk and drive need to be matched for it to work well. At the time I tried, there were no current drives and disks with that information available.
It is a matter of luck. Better not depend on them. Some DVD-RAM were archive grade, but only when written with the right drives.
No. These tests confirm that SSDs need to do data scrubbing to be reliable and hence need to have power for longer-term storage. The wear is a secondary effect.
My sample size was small (just a couple), but it decided me not to trust SSDs for backup even though everyone on Slashdot said I should trust them.
I most certainly never said such a stupid thing. SSDs are NOT long-term storage and neither are USB-sticks.
Anybody that did minimal research has known that for ages. SSDs do and need to do scrubbing, i.e. data refresh and for that they need to have power. If you want longer-term unpowered storage, use HDDs (but better stay away from the SMR trash). For long term storage use archive-grade tape or paper. Or stone tablets if it is low volume.
Looks like click bait or incompetence. Could be the latter.
I continue to use burned DVDs for backing up the critical stuff. Not perfect, of course, but not electromechanically-failure prone like a hard disk drive, not "terms of service" failure prone like cloud storage, and not "the charge magically held in the gate leaked away" failure prone. I have optical discs over 25 years old which are still perfectly readable.
DVD-R? DVD+R? DVD+RW? Single or dual layer? Gold metallic layer? Silver metallic layer? How are they stored?
Depending on how you answer those questions, your 25 year-old media may be past due and you've just gotten lucky, may be just entering the timeframe where it may die, or may have decades of reliable life left.
DVD-R single layer disks with a gold metallic layer are good for 50-100 years. Other recordable DVD options are less durable, some as little as 5-10 years.
Oh? When I was a teen (no Internet), I spent a lot of time in the local library reading about countless things that interested me. You know what rarely saw there? Other teens. The problem with most people is not access to information. The problem is lack of interest in information.
I have been saying that 25 years ago when looking at computer based "education".
You think wrongly.
Idiot screams at smart person. Well, at least you do that somewhat competently.
Real programmers don't write in BASIC. Actually, no programmers write in BASIC after reaching puberty.
