Apparatus and method for power-loss data protection in a system

A method for operating a memory system, the method comprising:

• performing a data input/output operation through a hardware layer and a firmware layer;
• and
• programming, through the hardware layer, at least one write data entry in a designated memory block, after checking whether the at least one write data entry input from an external device to be programmed in the memory device belongs to a programmable range in the memory device after power loss occurs and determining whether a logical address associated with the at least one write data entry is repeated,
• wherein the programming comprises:
• generating an event for power-loss data protection after power loss occurs;
• transferring information regarding a data input/output operation associated with a write data entry processed from the firmware layer to the hardware layer in response to the event;
• setting an identifier to the write data entry when the write data entry is completely processed for a program operation through the firmware layer;
• and
• programming the at least one write data entry, including the write data entry, collected by the hardware layer in the designated memory block.