Storage device and operation method thereof

A storage device comprising:

• a memory device including a plurality of dies;
• and
• a memory controller configured to:
• perform communication with at least one external device,
• generate signal for controlling operations of the memory device,
• receive, from the at least one external device, program commands and corresponding write data,
• store sequentially the program commands in a command queue in an order, in which the program commands are received,
• store the write data in a temporary buffer,
• select a program command from among the program commands stored in the command queue,
• determine whether the selected program command is a continuous program command or a discontinuous program command, and
• allocate, if the selected program command is a continuous program command, the write data of the selected program command to an entire area of a stripe that is a memory area formed over the plurality of dies,
• wherein the memory controller determines that the selected program command is the continuous program command when logical addresses for writing the write data of the selected program command are consecutive and a size of the write data of the selected program command is greater than or equal to a size of the stripe,
• wherein the memory controller is configured to:
• receiving a continuous program command allocated to the entire area of the stripe while discontinuous data has already been allocated to a portion of a stripe,
• cancelling the allocation of the discontinuous data;
• allocating a continuous data of the continuous program command to the entire area of the stripe;
• subtracting a continuous data parameter indicating a data size of the selected program command by the size of the stripe;
• and
• determining again whether the selected program command is the continuous program command.