Write Amplification Reduction with Sub-Indirection Unit (IU) Hinting

A data storage device, comprising:

• a memory device;
• and
• a controller coupled to the memory device, wherein the controller is configured to:
• receive a first write command to write first log data filling less than a predetermined indirection unit (IU) size;
• write the first log data to a portion of a first cache buffer having the predetermined IU size;
• receive a second write command to write second log data filling less than the predetermined IU size;
• write the second log data to a second cache buffer having the predetermined IU size;
• and
• route the second cache buffer to the memory device.

A data storage device, comprising:

• means to store data;
• and
• a controller coupled to the means to store data, wherein the controller is configured to:
• receive an indirection unit (IU) sized cache from a host device, wherein the cache includes log data from a plurality of write commands.