| Tool | RPMB Clean Support | SK Hynix FFU | Key Features | |------|--------------------|--------------|---------------| | | Available via eMMC Task → Clean RPMB (eMMC Full Reset) | Supports repartitioning & repair | Android ToolBox integrates MediaTek support for RPMB counter reset; excellent for Samsung moviNAND and SK Hynix | | Flash64 | Yes (Erase RPMB Data for UFS/eMMC) | Added for hB8aP>, hC8aP>, hC9aP3, hDEaP3 models | Supports RPMB Key Reading, unlimited repartitioning, WP removal, and CID/CSD write | | Z3X EasyJTAG Tool | Read and detect state ("Clean" vs "Not Clean") | Inconsistent; often requires FFU file | Can reliably report RPMB status; RPMB cleaning may require separate vendor commands or FFU flash | | Medusa Pro | Limited (primarily via FFU) | Support varies by chip revision | More focused on general eMMC reading/writing; RPMB cleaning not a primary feature |
chips, "patched" typically means the chip's firmware has been modified or updated using specialized tools like EasyJtag Plus to allow this reset. sergioprado.blog Core Concepts RPMB Partition
A secure partition used to store critical data like authentication keys and counters. Once a key is written, the partition is typically locked and cannot be erased through standard formatting. clean rpmb emmc skhynix patched
The introduction of clean RPMB in SKHynix's eMMC storage has significant implications for the industry. The benefits of this technology include:
Another powerful tool that supports EMMC firmware patching. | Tool | RPMB Clean Support | SK
Cryptographic keys used for hardware-level encryption.
Once the firmware update completes, the technician performs a hard reset of the eMMC chip and reads the health report again. If successful, the software will show the RPMB status as or "Clean." Risks and Limitations The introduction of clean RPMB in SKHynix's eMMC
SK Hynix, a leading eMMC manufacturer, has patched their devices to enhance security and fix known issues. The patch may affect how RPMB is accessed or cleaned.
sudo mmc rpmb read-counter /dev/mmcblk0
SK Hynix eMMC devices have been documented to exhibit certain behavioral quirks related to RPMB access. Some models may become , preventing the device from switching back to the main partition. The Linux kernel community has developed specific workarounds for these issues, including hardware reset sequences that attempt to recover stuck eMMC devices.