Internal Flash Page Erase is not working for nrf 52840 using nrf connect sdk

[AkashP]

We have made 2 partition of Internal flash. One is for running Application and Other for storing some configuration. I am trying to erase the page of 2nd partition, and it is not working properly.

2nd partition Id is storage.

flash_area_open(FLASH_AREA_ID(storage), &fa);

flash_area_read(fa,3840,array,256);

flash_area_erase(fa, 3840, 256); //erasing only one page of the storage sector

flash_area_write(fa,3840,array1,256);

Is the above steps are correct?. As I am not able to erase the page properly and working only first time.

[Menon]

Hello,

Since it is working the first time, I suspect it might be due to incorrect handling of the erase size or misalignment. Please ensure that each erase operation targets a full page (4096 bytes) aligned to the page boundary. You should perform the erase operation on a page-by-page basis. For the nRF52840, it is divided into 256 pages, each 4 kB in size. See product specification page No:22

Kind Regards,
Abhijith

[AkashP]

It means need to erase 4096 bytes completely and can not erase only one page 256bytes at a single execution?