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I am considering using flash memory, in the form of SD cards, as a means of complementing my regular DVD backups. The cards are getting reasonably cheap and have an impressive data density. However, I have read that such memory has only a limited retention time.
Hence, I am wondering:
- Firstly, considering that such memory has been around for a while, is any empirical data available regarding retention times? The best I've been able to come up with is using the manufacturers warranty as a baseline.
- Secondly, does rewriting the memory periodically `reset' the clock, so to speak?
How long are you looking to archive these for? – emgee – 2011-03-27T01:46:42.553
just a thought, I don't have hard proof of this but I've seen these things die without any sort of rough handling or exposure. And you'd end up with a bunch of these tiny little chips you can't easily label. The cost is something like $2 - $2.50 a gig which I don't think is all that cheap. It'd be as cost effective to buy a hard drive (you can get a terabyte for 55 bucks) or even a fast SSD (also 2 bucks a gig) – CreeDorofl – 2011-03-27T03:01:48.587
@emgee 5-10 years with scans every couple of years would be ideal. – Freddie Witherden – 2011-03-27T09:53:57.513