Click "Detect eMMC". Verify the chip shows as "SK hynix H26M41204HPR". Note the CID, CSD, and EXT_CSD registers.
: Resetting the RPMB allows the eMMC to be paired with a new processor or mainboard. If the RPMB is not clean (i.e., it already has a key from a previous device), the new phone often will not boot or will remain "dead" after programming.
: On many modern Android devices, if the RPMB is "dirty" (already programmed) or corrupted, the device will fail secure boot and won't turn on. A "Clean RPMB" state makes the chip appear new to the processor. clean rpmb emmc skhynix
If you see RPMB size: 0x00 but the chip datasheet says RPMB exists, or if you get I/O errors accessing the eMMC, RPMB is likely the culprit.
If you possess the original 32-byte authentication key programmed into the RPMB, you can read, write, or wipe the data within the RPMB programmatically. Click "Detect eMMC"
Short answer:
Every time data is written to this block, a "write counter" increments. This stops attackers from copying an old valid message and playing it back later to trick the system. : Resetting the RPMB allows the eMMC to
"To reset or clear the RPMB region on a SK hynix eMMC chip, issue an authenticated RPMB write operation (e.g., overwriting with zeros) using the device's secure key. Note that without the correct authentication key, RPMB contents cannot be modified."