On Tue, 22 May 2018 16:16:44 -0400, Paul
wrote:

Jimmy Wilkinson Knife wrote:


At what age does the data become unreadable if the drive has not been
powered up?

Flash is generally quoted as holding charge on a floating
gate for around 10 years.

That means, if you're using SSDs for archival storage, they
should be plugged in and re-written every five years, at a guess.

For a given design, I don't know how to guess at that value,
and the 10 year number is merely a "starting point, ball park number".

I'd suggest that every 5 years, you buy a new, faster, AND cheaper
newer flash, and move everything to it. You can consolidate while
you're at it.