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gzip -dc BOARD-oowow-latest-sd.img.gz > /dev/sdX # copy original parts sdfisk --dump /dev/sdX | tee /tmp/oowow.parts # add dump partition echo start=131072, type=7 | sfdisk --force -a /dev/sdX # format 2s part as exfat mkfs.exfat -n dumps /dev/sdX2