Storage device, method of operating storage device, and storage system including the storage device

An operation method of a storage device comprising:

• receiving a sub-address mapping table and meta data for the sub-address mapping table in response to an occurrence of an event;
• loading a meta data mapping table including the meta data into a memory;
• checking whether the sub-address mapping table is boosted based on the event;
• updating the meta data to perform a first update operation when a result of the checking indicates the sub-address mapping table is boosted;
• updating address mapping information of the sub-address mapping table to perform a second update operation when the result indicates the sub-address mapping table is not boosted;
• and
• flushing the meta data for the sub-address mapping table to a non-volatile memory included in the storage device based on the first update operation in response to a boost flag bit indicating the sub-address mapping table is boosted, wherein the sub-address mapping table is program-skipped in the flushing.

A storage system comprising:

• a storage device storing data;
• and
• a host providing a request for the data to the storage device and including a host memory,
• wherein the storage device comprises:
• a non-volatile memory device including a user area including a plurality of first memory blocks configured to store the data, and a meta area comprising an address mapping table including address mapping information for the plurality of first memory blocks and a meta data mapping table including meta data for the address mapping table, wherein the address mapping table includes a sub-address mapping table, and the meta data mapping table includes meta data for the sub-address mapping table;
• and
• a storage controller configured to update at least one of the meta data to perform a first update operation and the address mapping information to perform a second update operation within the storage controller, and flush the meta data for the sub-address mapping table into the meta area based on the first update operation in response to a boost flag bit indicating the sub-address mapping table is boosted, wherein the sub-address mapping table is program-skipped in the flushing.