Data storage apparatus and operation method thereof

A data storage apparatus comprising:

• a storage comprising a memory cell array and configured to complete a program operation for the memory cell array by performing a plurality of sub program cycles;
• and
• a controller configured to:
• control, as a first program request for first data is transmitted from a host device, the storage to perform some of the plurality of sub program cycles for the first data and then to transmit a partial program completion signal,
• receive second data from a host device and buffer the received second data, when the partial program completion signal is received, and
• control the storage to perform remaining sub program cycles other than the some of the sub program cycles for the first data while the second data is buffered.

An operation method of a data storage apparatus which comprises:

• a storage comprising a memory cell array and configured to complete a program operation for the memory cell array by sequentially performing a first stage program operation and a second stage program operation;
• and a controller configured to control the storage, the operation method comprising:
• transmitting, by the controller, a first program command for first data to the storage;
• performing, by the controller, a preparation operation for a subsequent request as the storage transmits a partial program completion signal to the controller in response to the first program command after the first stage program operation;
• and
• controlling, by the controller, the storage to perform the second stage program operation during the preparation operation.

An operating method of a controller, the operating method comprising:

• controlling a nonvolatile storage to perform a first operation of programming data therein in response to a first request, the first operation being configured by first and second stages;
• responding to the first request upon completion of the first stage;
• and
• controlling, upon completion of the second stage, the storage to perform a second operation in response to a second request arrived between the completion of the first and second stages,
• wherein the responding causes the second request.