Memory system and operating method of memory system

• US 10,146,480 B2
• Filed: 09/15/2016
• Issued: 12/04/2018
• Est. Priority Date: 03/25/2016
• Status: Active Grant

• Current Assignee: SK Hynix Inc.
• Original Assignee: SK Hynix Inc.
• Inventors: Shin, Beom-Ju
• Primary Examiner(s): Mercado, Ramon A.
• Application Number:
  US15/266,128
• Publication Number:
  US 20170277476A1
• Time in Patent Office: 810 Days
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0626 Reducing size or complexity of storage systems
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
• CPC Class Codes: G06F 3/0688 Non-volatile semiconductor memory arrays
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A memory system may include: a memory device comprising a plurality of pages, which include a plurality of memory cells coupled to a plurality of word lines, and in which data is stored, and a plurality of memory blocks in which the pages are included; and a controller configured to divide the memory blocks into a first group and a second group, perform a command operation corresponding to a command received from a host, and respectively store segments of user data and meta data for the command operation in memory blocks included in the first group or memory blocks included in the second group, in accordance with type information of the user data Included in the command.

Claims

1. A memory system comprising:

a memory device including a plurality of memory blocks; and

a controller suitable for dividing the memory blocks into a first group and a second group, performing a command operation corresponding to a command received from a host, and storing segments of user data and meta data for the command operation in memory blocks included in the first group or memory blocks included in the second group,

wherein the controller classifies the segments of the user data and meta data into a first type which are segments of the user data for performing a read operation, and a second type which are segments of the user data for performing a write operation, in accordance with type information which indicates a read, program, or write pattern of the user data and is included in the meta data, and the controller stores segments of the first type in the memory blocks of the first group, and stores segments of the second type in the memory blocks of the second group,

wherein when the controller classifies the segments of the user data as the first type, the controller performs the read operation for the segments of the user data in the first group,

wherein when the controller classifies the segments of the user data as the second type, the controller performs the write operation for the segments of the user data into the second group, then generates or updates the segments of meta data which correspond to the user data, in the second group, and

wherein the segments of meta data which are generated or updated include first map data which is mapping information of a logical address to a physical address (L2P) for the user data, second map data which is mapping information of a physical address to a logical address (P2L) for the user data, size information, command data information, and command operation information.

2. The memory system according to claim 1, wherein the controller checks a read count in accordance with the read operation for the segments of the first type, and the controller classifies the segments of the first type into a third type and a fourth type in accordance with the read count.

3. The memory system according to claim 2, wherein the controller migrates and stores segments of the third type stored in the memory blocks of the first group, to a first memory block of the first group, and the controller migrates and stores segments of the fourth type stored in the memory blocks of the first group, to a second memory block of the first group.

4. The memory system according to claim 3, wherein the first memory block includes a Multi Level Cell (MLC) memory block, and the second memory block includes a Triple Level Cell (TLC) memory block.

5. The memory system according to claim 2,

wherein the segments of the third type are segments of hot data, and the segments of the fourth type are segments of cold data.

6. The memory system according to claim 1, wherein the segments of the second type are segments of the user data and meta data for which, after being stored in the memory blocks of the second group, an update operation of the command operation is performed.

7. The memory system according to claim 6, wherein the controller stores the segments of the second type in first memory blocks, among the memory blocks of the second group, and then migrates and stores the segments of the second type to second memory blocks.

8. The memory system according to claim 7, wherein the first memory blocks include Single Level Cell (SLC) memory blocks and Multi Level Cell (MLC) memory blocks, and wherein the second memory blocks include the MLC memory blocks and Triple Level Cell (TLC) memory blocks.

9. An operating method of a memory system comprising:

receiving a command from a host;

checking user data included in the command and type information of the user data;

dividing a plurality of memory blocks of a memory device into a first group and a second group; and

performing a command operation corresponding to the command, and storing segments of the user data and meta data for the command operation in memory blocks included in the first group or memory blocks included in the second group, in accordance with the type information,

wherein the storing comprises;

classifying the segments of the user data and meta data into a first type which are segments of the user data for performing a read operation, and a second type which are segments of the user data for performing a write operation, in accordance with the type information which indicates a read, program, or write pattern of the user data; and

storing segments of the first type in the memory blocks of the first group, and storing segments of the second type in the memory blocks of the second group,

wherein when the segments of the user data are classified as the first type, the controller performs the read operation for the segments of the user data in the first group,

wherein when the segments of the user data are classified as the second type, the controller performs the write operation for the segments of the user data into the second group, then generates or updates the segments of the meta data which correspond to the segments of the user data, in the second group, and

wherein the segments of meta data which are generated or updated include first map data which is mapping information of a logical address to a physical address (L2P) for the user data, second map data which is mapping information of a physical address to a logical address (P2L) for the user data, size information, command data information, and command operation

dividing a plurality of memory blocks of a memory device into a first group and a second group; and

performing a command operation corresponding to the command, and storing segments of the user data and meta data for the command operation in memory blocks included in the first group or memory blocks included in the second group, in accordance with the type information,

wherein the storing comprises;

classifying the segments of the user data and meta data into a first type which are segments of the user data for performing a read operation, and a second type which are segments of the user data for performing a write operation, in accordance with the type information which indicates a read, program, or write pattern of the user data; and

storing segments of the first type in the memory blocks of the first group, and storing segments of the second type in the memory blocks of the second group,

wherein when the segments of the user data are classified as the first type, the controller performs the read operation for the segments of the user data in the first group,

wherein when the segments of the user data are classified as the second type, the controller performs the write operation for the segments of the user data into the second group, then generates or updates the segments of the meta data which correspond to the segments of the user data, in the second group, and

wherein the segments of meta data which are generated or updated include first map data which is mapping information of a logical address to a physical address (L2P) for the user data, second map data which is mapping information of a physical address to a logical address (P2L) for the user data, size information, command data information, and command operation information.

10. The operating method according to claim 9, further comprising:

checking a read count in accordance with the read operation for the segments of the first type; and

classifying the segments of the first type into a third type and a fourth type in accordance with the read count.

11. The operating method according to claim 10, further comprising:

migrating and storing segments of the third type stored in the memory blocks of the first group, to a first memory block of the first group; and

migrating and storing segments of the fourth type stored in the memory blocks of the first group, to a second memory block of the first group.

12. The operating method according to claim 11,

wherein the first memory block includes a Multi Level Cell (MLC) memory block, and

wherein the second memory block includes a Triple Level Cell (TLC) memory block.

13. The operating method according to claim 10,

wherein the segments of the third type are segments of hot data, and

wherein the segments of the fourth type are segments of cold data.

14. The operating method according to claim 9, wherein the segments of the second type are segments of the user data and meta data for which, after being stored in the memory blocks of the second group, an update operation of the command operation is performed.

15. The memory system according to claim 14, wherein the storing comprises migrating and storing the segments of the second type in first memory blocks, among the memory blocks of the second group, and then migrating and storing the segments of the second type to second memory blocks.

16. The operating method according to claim 15, wherein the first memory blocks include Single Level Cell (SLC) memory blocks and Multi Level Cell (MLC) memory blocks, and the second memory blocks include the MLC memory blocks and Triple Level Cell (TLC) memory blocks.