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DM8168 NAND Flash block error increasing quickly

Hi all

I develop on dm8168 evm board using dvr_rdk 2.80, and now i flash the jffs2 file system to nand flash,

and in my app i capture video and do encoder ,and write the 264 stream to hard disk,

when the app runs long time for example more than 2 hours , the print show that nand flash error blocks appears more and more, and the system broken,

when we power up again the linux system boot failure, it seems that the jffs2 system in has been broken,

Does someone kowns how will this happens , is that the jffs2 system flash error or some other reasons?

there are also error detected when the app run , and every time we flash the jffs2 system , the error block increased.

best regards

xavier