how to know it is first time to read from pstorage_load

[julian]

in sdk 4.3, I used two different ways to know it is read first time(in factory)

1. NRF_ERROR_NOT_FOUND from ble_flash_page_read to indicated first time it reads
2. 0xff valued read as first time

now pstorage_load, certainly can't use NRF_ERROR_NOT_FOUND, how about 2) is it ok to use 0xff for a 8bit int value as indicator for first time read?

Thanks!

[Chris Lovett]

I write my own unique signature at the beginning of my storage block, and if that signature is not found I assume the flash has been erased and start over.