nrf51422 strange behaviour of pstorage module

[Artucas]

Hello, i am seeing a strange behaviour of pstorage module and i don't understand what is happening. I have read links below:

pstorage-problem-on-power-off
saving-data-reliably-with-pstorage
nordic-info-pstorage

However, that didn't help me to solve my issue. As i understand, pstorage module should allow us to write data to flash and save it, so when device is powered off and turned on again, we could load and use that data from flash. Correct? I put the example code which i'm testing, in case i am missing something. Store operation is working, i can see data being written to flash, starting from address 0x3FC00. Load operation is working, i can see the same data loaded to my flash_block0_data array. The strange thing happens when i am reaching advertising_init() function. My init code for advertisements is given below. after executing this line of code memset(&advdata, 0, sizeof(advdata)); in advertising init function, i see that my data block in flash memory starting from address 0x3FC00 are set to 0xFF. Means i am loosing my data which was stored in flash. What is happening here, what i am missing? Is this normal behaviour? Thanks for any help in advance.

[RK]

You're probably using the same page the device manager is using and then calling device_manager_init() with 'true' to erase all the bonds which is then clearing the page back to 0xff. The ONLY way that data in flash goes back to 0xFF is on a page erase operation, so if you know fully well that it was something else, and checked that, then there must be a pstorage page clear happening.

[Artucas]

So how do i use different page of flash for my own purposes, not the same that device_manager uses? Now that you sad i didn't even notice, that i am doing pstorage_init() twice, one time in device_manager_init and second time in application_data_flash_manager_init(). That must be terribly wrong?

[Artucas]

Found answer here: preserve-app-data