Data storage system with complex memory and method of operating the same

A method of writing data in a data storage system comprising a host unit, a storage unit and a first input/output bus functioning as an interface between the host unit and the storage unit, wherein the storage unit includes a non-volatile memory buffer unit and a flash memory unit, the non-volatile memory buffer unit including a plurality of buffers arranged in parallel and the flash memory unit including a plurality of data storage devices arranged in parallel, the method comprising:

• writing data in a first buffer of the plurality of buffers;
• writing data in a second buffer of the plurality of buffers;
• writing data in a third buffer of the plurality of buffers;
• writing the data written in the first buffer in a first page of a first data storage device of the plurality of data storage devices;
• and
• writing the data written in the second buffer in a first page of a second data storage device of the plurality of data storage devices,
• wherein the writing of the data in the second buffer and the writing of the data written in the first buffer in the first page are simultaneously performed and the writing of the data in the third buffer and the writing of the data written in the second buffer in the first page are simultaneously performed,
• wherein a number of buffers included in the non-volatile memory buffer unit is greater than a number of data storage devices included in the flash memory unit.

A method of writing data in a data storage system comprising a host unit, a storage unit and a first input/output bus functioning as an interface between the host unit and the storage unit, wherein the storage unit includes a non-volatile memory buffer unit and a flash memory unit, the non-volatile memory buffer unit including a plurality of buffers arranged in parallel and the flash memory unit including a plurality of data storage devices arranged in parallel, the method comprising:

• writing data written in a first page of a first data storage device of the plurality of data storage devices in a first buffer of the plurality of buffers;
• writing data written in a first page of a second data storage device of the plurality of data storage devices in a second buffer of the plurality of buffers;
• writing data written in a second page of the first data storage device of the plurality of data storage devices in a third buffer of the plurality of buffers;
• wherein the writing of the data written in the first page of the second data storage device starts after the writing of the data written in the first page of the first data storage starts and ends after the writing of the data written in the first page of the first data storage device ends and the writing of the data written in the second page of the first storage device starts after the writing of the data written in the first page of the first data storage device ends;
• and
• while the writing of the data written in the first page of the second data storage device in the second buffer is performed, the data written in the first buffer is read and while the writing of the data written in the second page of the first data storage device in the third buffer is performed, the data written in the second buffer is read,
• wherein a number of buffers included in the non-volatile memory buffer unit is greater than a number of data storage devices included in the flash memory unit.