flash erase in fstorage & FDS

Question

Hi guys, 
 I am developing a appilication using nrf51822 using SDK 11. I am trying to use Fstorage and FDS to store data. I need this data to be updated frequently. As I awared, the flash can only be erase and write for 10000 times. Since I need to update the data very fast. Therefore, I need more than that. 
 I wonder if it is possible to store data in several registers and then after around 10000 times, I store the data in other register and keep updating? I have searched that there is a function in S130 that: sd_flash_page_erase. However, it erases the whole flash page, is there other API for erase reveral registers only because as I know, the flash pages is 3 or 4 only? 
 Thank you for your kind support.

shibshab · Accepted Answer

Do you need to store it in flash for every update? Note that you only need to store it to flash before you power off the board. So as long as the board is powered on, you update the variable "locally" any number of times, before you write it to flash before shutting down. 
 Anyway, FDS will itself do "wear limitation", which means that it will use different areas of flash for each write until it has used all of its allocated area. So if you are only updating a small set of values, and you have allocated a lot of space for FDS you will be able to perform many updates before a flash erase needs to be performed. 
 There is no way to erase a flash area smaller than a single page.

flash erase in fstorage & FDS

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