https://devzone.nordicsemi.com/f/nordic-q-a/62342/nrf-connect-desktop---programmer---unexpected-memory-regions-after-dfuHello, I am working on the Nordic DFU to develop a bootloader for OTA update on our product. So far I just ported the Secure Bootloader from Nordic examples. No functionality has been changed. Testing the DFU with different security settings anden-USTelligent Community 13Sun, 14 Jun 2020 18:01:46 GMThttps://devzone.nordicsemi.com/thread/254856?ContentTypeID=1Sun, 14 Jun 2020 18:01:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9aadd24a-e88d-47e2-9749-4f21dcd66f22davege<p>You are absolutely right Vidar! I looked at the content, and those are effective the tag from FDS (1 swap and 2 data).</p> <p>Thanks for immediately pointing at that and your very quick reply!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/253979?ContentTypeID=1Tue, 09 Jun 2020 09:23:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dd2f4e6e-4fd9-42c2-bcf8-7595afd2a89bVidar Berg<p>Hi,</p> <p>FDS will tag each of its allocated flash page with a magic word on first boot, see <span><a title="Page tag" href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_fds_format.html?cp=7_1_3_56_2_1#lib_fds_format_page">Page tag</a></span>. Did you initialize the peer manager in your app? In that case, those three pages that are shown in the app data region (<span><a title="Memory layout" href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_bootloader.html?cp=7_1_3_5_0_7#lib_bootloader_memory">Memory layout</a></span>)&nbsp; are going to be from the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_fds.html">FDS </a>(peer manager inits FDS to handle NV storage).</p><div style="clear:both;"></div>