Memory system

A method of controlling a plurality of memory dies, the method comprising:

• in response to receiving a first read command requesting a reading of data to be read from a host, dividing, by a controller, the data to be read into a plurality of data parts corresponding to a plurality of clusters, and generating a plurality of read requests each including memory address information indicating a storage location of a non-volatile memory in which a corresponding data part of the plurality of data parts is stored,
• storing, by the controller, the plurality of read requests in a first read request queue associated with a first identifier assigned to the first read command such that the plurality of read requests are linked in an order from a read request corresponding to a head cluster of the plurality of clusters to a read request corresponding to a last cluster of the plurality of clusters,
• storing, by the controller, the first identifier in a first command queue corresponding to a first memory die, the first memory die storing a first data part of the plurality of data parts corresponding to the head cluster,
• in response to storing the first identifier in the first command queue, specifying, by the controller, a first storage area of the first memory die, the first storage area storing a first data which is associated with a head of the data to be read and includes at least the first data part of the plurality of data parts, and wherein specifying the first storage area is performed by referring to the plurality of read requests stored in the first read request queue, from the read request corresponding to the head cluster,
• generating, by the controller, a first memory read request for reading the first data from the first storage area of the first memory die,
• issuing, by the controller, the first memory read request to the first memory die,
• in response to one or more unprocessed read requests of the plurality of read requests remaining in the first read request queue, transferring, by the controller, the first identifier from the first command queue to a second command queue corresponding to a second memory die, the second memory die storing a second data part of the plurality of data parts, the second data part corresponding to a head cluster of the one or more unprocessed read requests,
• in response to transferring the first identifier to the second command queue, specifying, by the controller, a second storage area of the second memory die, the second storage area storing a second data at a head of remaining data of the data to be read, the second data including at least the second data part of the plurality of data parts, and wherein specifying the second storage area comprises referring to the one or more unprocessed read requests stored in the first read request queue, from an unprocessed read request corresponding to a head cluster of one or more clusters corresponding to the remaining data,
• generating, by the controller, a second memory read request for reading the second data from the second storage area of the second memory die, and
• issuing, by the controller, the second memory read request to the second memory die.