Multi-namespace storage device, electronic system including the storage device, and method of operating the storage device

A multi-namespace electronic system, comprising:

• a plurality of nonvolatile memories which comprise a first nonvolatile memory and a second nonvolatile memory;
• a memory controller which controls the nonvolatile memories;
• and
• a host which is connected to the memory controller and sends a command for requesting creation of a first namespace comprising a first logical block number and a second namespace comprising a first logical page number not included in the first logical block number,
• wherein the host sends a physical mapping command for instructing physical mapping of the first namespace, and the memory controller performs a first mapping operation by mapping the first logical block number to a first memory block in the first nonvolatile memory and performs a second mapping operation by mapping the first logical page number to a first memory page included in the second nonvolatile memory in response to the physical mapping command,
• wherein the first namespace comprises a second logical page number not included in the first logical block number, and the memory controller performs a third mapping operation by mapping the second logical page number to the first memory block, together with the first mapping operation.

A method of operating a multi-namespace storage device, the method comprising:

• sending a command for requesting creation of a first namespace comprising a first logical block number and creation of a second namespace comprising a first logical page number not included in the first logical block number to a memory controller;
• sending a first write command for the first logical block number to the memory controller together with a physical mapping command for instructing physical mapping of the first namespace;
• storing first mapping information of the first logical block number to a first memory block corresponding to the first logical block number in a mapping table in response to the physical mapping command;
• performing a first write operation on the first memory block in response to the physical mapping command;
• sending a second write command for the first logical block number to the memory controller after sending the first write command;
• performing a second write operation on the first memory block based on the second write command and the mapping table;
• performing a first mapping operation by mapping the first logical block number to the first memory block in response to the physical mapping command;
• performing a second mapping operation by mapping the first logical page number to a first memory page included in a second memory block different from the first memory block in response to the physical mapping command,
• wherein the first namespace comprises a second logical page number not included in the first logical block number;
• and
• performing a third mapping operation by mapping the second logical page number to the first memory block, together with the first mapping operation.