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Another limitation is that flash memory has a finite number of program-erase cycles ( typically written as P / E cycles ).

Most commercially available flash products are guaranteed to withstand around 100, 000 P / E cycles, before the wear begins to deteriorate the integrity of the storage.

Micron Technology and Sun Microsystems announced an SLC NAND flash memory chip rated for 1, 000, 000 P / E cycles on 17 December 2008.