OT: Flash memory (was Re: Project storage on removable devices?)

[Keith S.]

Steven Peterson wrote:

>
>Well if thats the case it wouldn't be so bad seeing as harddrives usually 
>don't make it past 2-5 years anyways. Lots of things cause them to wear out. 
>But how can a flash memory block "wear out"? I thought that was one of the 
>great things about flash memory - it's indestructible and will stand the test 
>of time and use.
>
Flash memory works by applying a high voltage across a thin dielectric 
to charge/discharge
a 'floating' gate. The dielectric is slowly damaged by this, and flash 
memory has a lifetime
of 10000 - 100000 writes. So in practise it lasts as long as your 
average hard disk when used
for occasional storage.

- Keith


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