In an example, an apparatus may include a memory comprising a number of groups of memory cells and a controller coupled to the memory and configured to track respective invalidation velocities of the number of groups of memory cells and to assign categories to the number of groups of memory cells based on the invalidation velocities.

Data categorization based on invalidation velocities

Approaches, techniques, and mechanisms are disclosed for a method of operation of a Flash-based block storage system including: transferring a first data to a logical block address; storing the first data in a physical block, of a storage array, associated with the logical block address; receiving a trim command for the logical block address; establishing a reserved physical block associated with the logical block address of the trim command; transferring second data for writing to the logical block address of the trim command; releasing the reserved physical block associated with the logical block address; and writing the second data to the logical block address.

Flash-based block storage system with trimmed space management and method of operation thereof

A memory controller implemented within a non-volatile data storage device with improved efficiency for executing data invalidation commands is disclosed. In one embodiment, the non-volatile data storage device in communication with a host device and comprises a processor, a memory device that includes a plurality of physical storage locations, a cache memory configured to store a map table and a count value. The controller is configured to receive a data invalidation request from the host device where the request includes an execution parameter. Based on the execution parameter, the controller executes the invalidation request in an efficient and flexible manner.

Data invalidation acceleration through approximation of valid data counts

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Data invalidation acceleration through approximation of valid data counts