Some SK Hynix chips show "Bad Health" or "Life Time Exhausted" reports. Specialized tools can sometimes reset these counters or clear the RPMB to restore functionality.
Once an RPMB key is programmed, it typically cannot be changed or erased through standard software means. Why "Clean" the RPMB? clean rpmb emmc skhynix
An eMMC chip from a salvaged Samsung phone, for example, will have a programmed RPMB key. To use that chip in another model, the RPMB must be cleared so a new key can be written. Some SK Hynix chips show "Bad Health" or