Controller and memory system for performing garbage collection operation, and operating method thereof

A method for operating a controller for controlling an operation of a semiconductor memory device, the method comprising:

• determining victim blocks on which a garbage collection operation is to be performed, based on a reference table representing memory blocks excluded from selection as a victim block on which a garbage collection operation is to be performed;
• copying data of valid pages included in the victim blocks to a free block;
• and
• invalidating the valid pages included in the victim blocks,
• wherein the reference table is updated by:
• checking a size of the data corresponding to an erase request from a host;
• comparing the size of the data with a reference value;
• and
• registering the memory block storing the data corresponding to the erase request in the reference table, based on the comparison result.

A controller for controller an operation of a semiconductor memory device, the controller comprising:

• a storage configured to store a reference table representing memory blocks excluded from selection as a victim block on which a garbage collection operation is to be performed, based on an erase request received from the outside of the controller;
• and
• a garbage collection controller configured to control the garbage collection operation on the semiconductor memory device, based on the reference table,
• wherein the storage updates the reference table by:
• checking a size of the data corresponding to the erase request;
• comparing the size of the data with a reference value;
• and
• registering the memory block storing the data corresponding to the erase request in the reference table, based on the comparison result.

A memory system comprising:

• a semiconductor memory device having a plurality of memory blocks, each of the memory block having a plurality of memory cells;
• and
• a controller for controlling an operation of the semiconductor memory device,
• wherein the controller is configured to:
• store a reference table representing memory blocks, among the plurality of memory blocks of the semiconductor memory device, excluded from selection as a victim block on which a garbage collection operation is to be performed, based on an erase request received from the outside of the memory system;
• and
• control the garbage collection operation on the semiconductor memory device, based on the reference table, and
• wherein the controller checks a size of data corresponding to the erase request, and determines that a memory block in which the data is stored is to be excluded from the selection as the victim block, when the size of the data is greater than a reference value.

A controller for controlling an operation of a semiconductor memory device, the controller comprising:

• a storage configured to store a reference table representing memory blocks to be excluded from selection as a victim block of a garbage collection operation, based on an erase request from a host;
• and
• a garbage collection controller configured to control the garbage collection operation on the semiconductor memory device, based on exclusion block information generated according to the reference table,
• wherein the storage checks a size of data corresponding to the erase request, and determines that a memory block in which the data is stored is to be excluded from the selection as the victim block, when the size of the data is greater than a reference value.

A memory system comprising:

• a semiconductor memory device having a plurality of memory blocks, each of the memory block having a plurality of memory cells;
• and
• a controller for controlling an operation of the semiconductor memory device,
• wherein the controller is configured to:
• store a reference table representing memory blocks, among the plurality of memory blocks of the semiconductor memory device, to be excluded from selection as a victim block on which a garbage collection operation, based on an erase request received from the outside of the memory system;
• and
• control the garbage collection operation on the semiconductor memory device, based on the reference table, and
• wherein the controller checks a size of data corresponding to the erase request, and determines that a memory block in which the data is stored is to be excluded from the selection as the victim block, when the size of the data is greater than a reference value.