: SK Hynix chips often require a firmware update or "patch" to bypass the hardware-level write protection on the RPMB partition. Specialized boxes (UFI, EasyJtag) apply these patches to force the chip to accept a "clean" command. sergioprado.blog Why This Is Done F64 box Sec Emmc Rpmb clean
You should see SKHYNIX and RPMB Size: 0x00004000 (or similar). clean rpmb emmc skhynix patched
Flashing the wrong patched firmware to an eMMC controller can permanently kill the chip. : SK Hynix chips often require a firmware