Abstract: There are provided a memory system and an operating method thereof. The memory system includes: a memory device configured to perform a write operation and a read operation of data; and a controller configured to control the memory device to perform the write operation and the read operation in response to commands received from a host, wherein the controller controls the memory device, in response to a read command corresponding to the read operation among the received commands, to perform the read operation on data at a first address corresponding to the read command and perform a pre-read operation on data at a second address corresponding to a read command not yet received, transmit read data corresponding to the read operation to the host, and store pre-read data corresponding to the pre-read operation.

Abstract: a memory system may include: a memory device including a plurality of memory dies each having a plurality of memory blocks; and a controller suitable for performing one or more of data defragmentation and data remapping operations for a target transaction group in the memory device in response to a request message provided from a host, transmitting a completion message to the host as a response to the request message, and receiving an access to the transaction group, from the host.

Abstract: a memory system may include: a memory device including a plurality of memory dies each having a plurality of memory blocks; and a controller suitable for performing one or more of data defragmentation and data remapping operations for a target transaction group in the memory device in response to a request message provided from a host, transmitting a completion message to the host as a response to the request message, and receiving an access to the transaction group, from the host.