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?