Controller including fault management device and fault management method

A controller, comprising:

• a fault analysis module configured to analyze an error log to generate a fault address and a mode information signal when a specific fault mode is detected;
• and
• a fault management module configured to:
• during a first operation, store the fault address in a first storage circuit while masking one or more bits of the fault address, and mask one or more bits of a repair address corresponding to the masked bits of the fault address, among a plurality of repair addresses pre-stored in a second storage circuit, according to the mode information signal, and
• during a second operation, output a selected repair address from the second storage circuit according to a result of comparing stored fault addresses in the first storage circuit with an input address.

A fault management method, comprising:

• storing a fault address of a memory device in a first storage circuit while masking one or more bits of the fault address, according to a mode information signal indicating faults in two or more sub-word lines among a plurality of sub-word lines arranged in the memory device;
• masking one or more bits of a repair address corresponding to the masked bits of the fault address, among a plurality of repair addresses pre-stored in a second storage circuit, according to the mode information signal;
• searching for an input address from the first storage circuit;
• and
• outputting a selected repair address from the second storage circuit according to the search result.