Methods for manufacturing and operating a memory device and a method for operating a system having the same

A method for operating a memory device, comprising:

• receiving an instruction from a host;
• and
• transferring at least one of start addresses of defect-free memory regions for addressing modes to the host in response to the instruction,
• wherein the start addresses of defect-free memory regions are programmed in the memory device in a mass-production phase, wherein the start addresses are different from each other according to a size of a corresponding one of the defect-free memory regions.

A method for operating a memory system which includes a host, a first memory device, and a second memory device, comprising:

• reading, by the host, a first start address of a plurality of start addresses from the first memory device, wherein the plurality of start addresses correspond to defect-free memory regions for addressing modes;
• reading, by the host, a boot loader from the second memory device;
• and
• writing, by the host, the boot loader in a defect-free memory region corresponding to the first start address,
• wherein the addressing modes include a row-bank-column addressing mode and a bank-row-column addressing mode.