STORAGE CONTROL DEVICE, DATA STORAGE DEVICE AND STORAGE CONTROL METHOD

PROBLEM TO BE SOLVED: To provide a storage control device capable of achieving an efficient buffer control.SOLUTION: A control device of a data storage device including nonvolatile memory 13 having a plurality of banks and buffer memory 11 comprises a first buffer controller 10 and a second buffer controller 12. The buffer memory includes a plurality of areas allocated for each bank. The first buffer controller stores data in a first unit, which is transferred from a host and written in the nonvolatile memory or transferred to the host by being read from the nonvolatile memory for each data buffer area. The second buffer controller independently transfers data in a second unit from the data buffer area corresponding to the bank of which transfer preparation has been completed when writing the data in the nonvolatile memory, and independently transfers the data in the second unit to the data buffer area corresponding to the bank to be read from the bank to be read when transferring the data to the host.