FDS lifetime

[Challen]

Hi, I use SDK13.1 FDS example and have some questions about that. Is there any influence about the lifetime of Flash when i use FDS function to write and delete the records.If it has,how to calculate the lifetime of Flash.Thanks.

[3Rsteven]

hi MatinBL

i try to do simple Calculation with FDS lift time. is it right?(only two page ,

on nrf52(one page is 4096B)

with base case , only two page (one data and swap). to asset the swap page erase/write count about lifttime.

if every one minute ,and save one work data. with 2 page(1 data and 1 swap) ,do gc when full update

one FDS Record = TL Part+ IC Part+ Record ID and data(1W) ,is 4 words . 

the data page and swap page 2Word, 0xDEADC0DE F11E01FE and 0xDEADC0DE F11E01FF

 1. every page should be update 255 times/minute, 1024W - 2W(header) / 4 =255 (4.25 hours)

 then swap page and one of data page ,do fds_gc(erase then write ) 

2. Suppose 4.25 x ~10000(nrf52 minimum 10000 write/erase) , it should be about 5 years(4.9189).

3. if more than data page ,it will more and more ?