Memory system and method

A memory system connectable with a host, the host including a host memory and a control circuit, the control circuit being configured to access the host memory in a unit of a first size, the memory system comprising:

• a nonvolatile memory;
• and
• a controller capable of communicating with the host and configured to:
• when an address designated by the host as a first location of the host memory where read data read from the nonvolatile memory is to be stored is not aligned with a boundary in the host memory defined in a unit of the first size,
• transmit, to the host, a first packet which has a size from the first location to the boundary and includes the read data to be stored from the first location;
• and
• transmit, to the host, a second packet which has the first size and includes the read data to be stored from the boundary thereafter.