Storage device and data processing system including the same

A data storage device, comprising:

• an interface receiving a command and data from a host;
• a cache temporarily storing the received data;
• a memory non-temporarily storing the data stored in the cache;
• and
• a controller controlling the memory and the cache based on the command received from the host,
• wherein the command includes charge rate and charging state information of a battery supplying a power to the data storage device, and
• the controller determines whether or not to perform a synchronization operation based on the charge rate and charging state information of the battery, when receiving a synchronization command from the host,
• wherein the synchronization command includes a flush command,
• when the charge rate of the battery is a first level or more and the charging state information indicates that the battery is being charged, the controller does not perform a flush operation for the data stored in the cache when receiving the flush command from the host, and
• when the charge rate of the battery is less than the first level, the controller performs the flush operation for the data stored in the cache regardless of the charging state information when receiving the flush command from the host.

A method of manufacturing a data storage device, comprising:

• providing the data storage device including an interface externally receiving a command and data, a cache temporarily storing the received data, a memory non-temporarily storing the data stored in the cache, and a controller controlling the memory and the cache based on the command;
• and
• testing the data storage device,
• wherein the command includes a charge rate and charging state information of a battery supplying a power to the data storage device, and
• the testing the data storage device includes testing whether or not the controller included in the data storage device determines an active operation mode of the data storage device based on the charge rate and charging state information of the battery, and whether or not the data storage device performs a synchronization operation,
• wherein, in the determining the active operation mode of the data storage device,
• the controller determines whether or not the data storage device is an idle state, and determines the active operation mode of the data storage device when the data storage device is the idle state,
• the controller determines the active operation mode of the data storage device as a first mode in which power consumption of the data storage device is minimized, when the charge rate of the battery is less than a first level, and
• the controller determines the active operation mode of the data storage device as a second mode in which processing speed of the data storage device is maximized and which is different from the first mode, regardless of the charging state information of the battery, when the charge rate of the battery is the first level or more.