Method of managing data storage device and data storage device

摘要

A method of managing a data storage device including a memory controller and a memory device includes: calculating a first sequential and consecutive write cost (SCWC) according to a garbage collection (GC) write operation policy, a second SCWC according to a slack space recycling (SSR) write operation policy and a third SCWC according to an in-place updating (IPU) write operation policy respectively, in response to a write request in the memory controller; determining a write operation policy which has a minimum cost of the first through third SCWCs; and writing data in a selected segment in the memory device according to the determined write operation policy.

主权项

1. A method of managing a data storage device including a memory controller and a memory device, the method comprising:
for a write request received at the data storage device:
calculating a first sequential and consecutive write cost (SCWC) according to a garbage collection (GC) write operation policy,calculating a second SCWC according to a slack space recycling (SSR) write operation policy, andcalculating a third SCWC according to an in-place updating (IPU) write operation policy; determining a write operation policy which has a lowest cost among the first through third SCWCs; and writing data in a selected segment in the memory device according to the determined write operation policy, wherein the selected segment is selected by selecting at least one segment having a minimum valid space among a plurality of used segments of the memory device, and, when the at least one segment includes a plurality of segments, selecting as the selected segment a segment among the plurality of used segments having the minimum valid space which also has a largest consecutive invalid space.