The NVS in the nCS erases the contents in DFU, is this a specification? or bug?

Question

As the title suggests, is this a specification? or bug? otherwise something missing in the settings? 
 NVS values did not vanished while nRF5 SDK used. 
 before DFU 
 
 after DFU

Amanda Hsieh · Accepted Answer

Hi, 
 
 If you have multi-image build, it will automatically enable the Partition Manager. In your case, you are using DFU. So it should already enable MCUBoot, and then the Partition Manager would be enabled automatically. 
 Just build the project normally and then copy the partitions.yml from the build directory into the app root directory and name it pm_static.yml. 
 
 -Amanda H.

Yoshihiro Goto · Answer

Hi, 
 Thank you for your advice. 
 Best Regards, Yoshihiro Goto

Amanda Hsieh · Answer

Hi, 
 If you are using the nRF Connect app, there is an equivalent settings in Settings/Mcu Manager options/Erase application settings . 
 Could you please check if that is the cause? 
 If it doesn't help. Could you try to set CONFIG_IMG_ERASE_PROGRESSIVELY to see if it differs from this? 
 
 I will start the holiday tomorrow and will not reply until January. 09.2024. If this case is urgent to support. Please create a new support case. 
 Merry Christmas & Happy New Year. 
 Amanda H.

The NVS in the nCS erases the contents in DFU, is this a specification? or bug?

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