Method for controlling write and read operations in the nonvolatile memory by a host, using an identifier for a region

A memory system connectable to a host, the memory system comprising:

• a nonvolatile memory including a plurality of blocks, each of the plurality of blocks being a unit of a data erase operation, the plurality of blocks including at least a first block;
• and
• a controller electrically connected to the nonvolatile memory and configured to:
• receive from the host a write command, the write command designating at least a logical address corresponding to first data to be written, and storage location information indicative of a storage location in a write buffer of the host where the first data is stored;
• determine the first block as a write destination block to which the first data is to be written;
• before a write operation to write the first data to the first block is completed, notify the host of at least a block address of the first block;
• retrieve the first data from the write buffer of the host on the basis of the storage location information, and perform the write operation to write the first data to the first block;
• and
• determine whether the write operation of the first data fails, after notifying the host of the block address of the first block.