Method for performing adaptive locking range management, associated data storage device and controller thereof

A data storage device, comprising:

• a non-volatile (NV) memory, configured to store information, wherein the NV memory comprises at least one NV memory element;
• and
• a controller, coupled to the NV memory, configured to control operations of the data storage device, wherein the controller comprises:
• a processing circuit, configured to control the controller according to a plurality of host commands from a host device, to allow the host device to access the NV memory through the controller, wherein:
• the controller receives a security command from the host device, wherein the security command is related to changing an old locking range into a new locking range;
• the controller obtains a start Logical Block Address (LBA) and a length value of the new locking range according to the security command, wherein an end LBA of the new locking range is a sum of the start LBA and the length value of the new locking range;
• the controller determines whether the start LBA of the new locking range is less than an end LBA of the old locking range, and determines whether the end LBA of the new locking range is greater than a start LBA of the old locking range;
• and
• in response to the start LBA of the new locking range being less than the end LBA of the old locking range and the end LBA of the new locking range being greater than the start LBA of the old locking range, the controller performs data trimming on any respective non-overlapped portions of the new locking range and the old locking range.

A controller of a data storage device, the data storage device comprising the controller and a non-volatile (NV) memory, the NV memory comprising at least one NV memory element, the controller comprising:

• a processing circuit, configured to control the controller according to a plurality of host commands from a host device, to allow the host device to access the NV memory through the controller, wherein:
• the controller receives a security command from the host device, wherein the security command is related to changing an old locking range into a new locking range;
• the controller obtains a start Logical Block Address (LBA) and a length value of the new locking range according to the security command, wherein an end LBA of the new locking range is a sum of the start LBA and the length value of the new locking range;
• the controller determines whether the start LBA of the new locking range is less than an end LBA of the old locking range, and determines whether the end LBA of the new locking range is greater than a start LBA of the old locking range;
• and
• in response to the start LBA of the new locking range being less than the end LBA of the old locking range and the end LBA of the new locking range being greater than the start LBA of the old locking range, the controller performs data trimming on any respective non-overlapped portions of the new locking range and the old locking range.