Memory system and operating method thereof
AssigneeSK hynix Inc.
InventorSoon Yeal Yang
Life of this patent
Estimating the term…
Abstract
A memory system includes a plurality of memory devices and a controller, wherein each of the plurality of memory devices includes zone blocks. The controller is configured to evenly distribute open zone blocks within the memory devices by referring to an activated zone block count table and a full zone block count table. The activated zone block count table includes an activated zone block count of each of the memory devices, and the full zone block count table includes a full zone block count of each of the memory devices.
Claims20
A memory system comprising:
- a plurality of memory devices each including zone blocks;
- and
- a controller configured to evenly distribute open zone blocks within the memory devices by referring to an activated zone block count table and a full zone block count table,
- wherein the activated zone block count table includes an activated zone block count of each of the memory devices, and the full zone block count table includes a full zone block count of each of the memory devices.
A memory system comprising:
- a plurality of memory devices each including zone blocks;
- and
- a controller configured to determine, based on an activated zone block count of a candidate memory device among the memory devices and differences of full zone block counts respectively corresponding to remaining memory devices among the memory devices, a candidate zone block included in the candidate memory device as a new open zone block,
- wherein each of the differences of the full zone block counts is a difference between a full zone block count of the candidate memory device and the full zone block count of a corresponding memory device among the remaining memory devices.
An operating method of a memory system, the operating method comprising:
- determining, as a candidate zone block, a free zone block having a least erase count among free zone blocks included in memory devices of a candidate memory device list;
- determining whether an activated zone block count of a candidate memory device, which has the candidate zone block, is greater than a first threshold;
- determining whether any of differences between a full zone block count of the candidate memory device and respective full zone block counts of remaining memory devices is greater than a second threshold;
- and
- determining the candidate zone block as a new open zone block according to results of the determining.
Dependencies are inferred from the claim text.