adb shell 255|shell@hwp7:/ $ su root@hwp7:/ # cd /storage/sdcard1/ root@hwp7:/storage/sdcard1 # mkdir -p PartitionBackup root@hwp7:/storage/sdcard1 # cd PartitionBackup root@hwp7:/storage/sdcard1/PartitionBackup # dd of=nvme > if=/dev/block/platform/ff1fe000.dwmmc0/by-name/nvme 8192+0 records in 8192+0 records out 4194304 bytes transferred in 0.916 secs (4578934 bytes/sec) root@hwp7:/storage/sdcard1/PartitionBackup # dd of=oeminfo > if=/dev/block/platform/ff1fe000.dwmmc0/by-name/oeminfo 65536+0 records in 65536+0 records out 33554432 bytes transferred in 8.768 secs (3826919 bytes/sec) root@hwp7:/storage/sdcard1/PartitionBackup # dd of=recovery > if=/dev/block/platform/ff1fe000.dwmmc0/by-name/recovery 32768+0 records in 32768+0 records out 16777216 bytes transferred in 4.419 secs (3796609 bytes/sec) root@hwp7:/storage/sdcard1/PartitionBackup # strings nvme | grep WVDEVID -B 1 1234567890123456