System and method of writing to nonvolatile memory using write buffers

A memory system connectable to a host, comprising:

• a nonvolatile memory including a plurality of blocks, each of the plurality of blocks being a unit of a data erase operation, each of the plurality of blocks including a plurality of word lines, each of the plurality of word lines connecting a plurality of memory cells;
• and
• a controller electrically connected to the nonvolatile memory and configured to:
• acquire first data from a write buffer,
• write the first data to a first memory cell connected to a first word line of a first block, and
• in response to detecting that a first command is not received from the host for a threshold time period since the first data is written to the first memory cell, the first command being to instruct to write second data to a second memory cell connected to a second word line of the first block, the second word line being different from the first word line, write dummy data to the second memory cell.

A method of controlling a nonvolatile memory, the nonvolatile memory including a plurality of blocks, each of the plurality of blocks being a unit of a data erase operation, each of the plurality of blocks including a plurality of word lines, each of the plurality of word lines connecting a plurality of memory cells, the method comprising:

• acquiring first data from a write buffer,
• writing the first data to a first memory cell connected to a first word line of a first block;
• and
• in response to detecting that a first command is not received from a host for a threshold time period since the first data is written to the first memory cell, the first command being to instruct to write second data to a second memory cell connected to a second word line of the first block, the second word line being different from the first word line, writing dummy data to the second memory cell.