DATA STORAGE DEVICE AND DATA MANAGEMENT METHOD THEREOF

• US 20170269834A1
• Filed: 02/20/2017
• Published: 09/21/2017
• Est. Priority Date: 03/18/2016
• Status: Abandoned Application

• Current Assignee: Silicon Motion, Inc. (Silicon Motion)
• Original Assignee: Silicon Motion, Inc. (Silicon Motion)
• Inventors: Liang, Teng-Chi, Yeh, Yen-Ting
• Application Number:
  US15/437,397
• Publication Number:
  US 20170269834A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0656 Data buffering arrangements
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

A data management method for a data storage device is provided. The data storage device includes a non-volatile memory. The non-volatile memory includes a plurality of pages. Each of the pages is configured to store a plurality of records of data. The data management method includes steps of: receiving a read command; reading target data from a data buffering storage device when the target data corresponding to the read command is stored in the data buffering storage device; determining whether an amount of data of remaining data in the data buffering storage device is greater than a threshold, wherein the remaining data is a part of subsequent data, and the target data and the remaining data have a sequential relationship in terms of data reading; and if the determination result is false, storing data in at least one subsequent page of the target data into the data buffering storage device.

Claims

1. A data management method for a data storage device, the data storage device comprising a non-volatile memory, the non-volatile memory comprising a plurality of pages, each of the pages being configured to store a plurality of records of data, and the data management method comprising steps of:

receiving a read command;

reading target data from a data buffering storage device when the target data corresponding to the read command is stored in the data buffering storage device;

determining whether an amount of data of remaining data in the data buffering storage device is greater than a threshold, wherein the remaining data is a part of subsequent data, and the target data and the remaining data have a sequential relationship in terms of data reading; and

if a result of the determination is false, storing data in at least one subsequent page of the target data into the data buffering storage device.

2. The data management method according to claim 1, further comprising steps of:

reading at least one of the pages containing the target data from the non-volatile memory if the target data corresponding to the read command is not stored in the data buffering storage device; and

storing the subsequent data in at least one of the pages into the data buffering storage device.

3. The data management method according to claim 1, further comprising steps of:

reading at least one of the pages containing the target data from the non-volatile memory if the target data corresponding to the read command is not stored in the data buffering storage device; and

storing the target data and the subsequent data in at least one of the pages into the data buffering storage device.

4. The data management method according to claim 1, wherein the threshold is smaller than a size of the page.

5. The data management method according to claim 1, wherein the amount of data is a difference between a maximum address value and a minimum address value of the remaining data.

6. The data management method according to claim 1, wherein the subsequent data subtract the target data is equal to the remaining data.

7. A data management method for a data storage device, the data storage device comprising a non-volatile memory, the non-volatile memory comprising a plurality of pages, each of the pages being configured to store a plurality of records of data, and the data management method comprising steps of:

receiving a read command;

reading target data from a data buffering storage device according to the read command;

determining whether an amount of data of remaining data in the data buffering storage device is greater than a threshold, wherein the remaining data is a part of subsequent data, and the target data and the remaining data have a sequential relationship in terms of data reading; and

if a result of the determination is false, recording data in at least one subsequent page of the target data into the data buffering storage device.

8. The data management method according to claim 7, further comprising steps of:

reading at least one of the pages containing the target data from the non-volatile memory according to the read command; and

recording the subsequent data in at least one of the pages into the data buffering storage device.

9. The data management method according to claim 7, further comprising steps of:

reading at least one of the pages containing the target data from the non-volatile memory according to the read command; and

recording the target data and the subsequent data in at least one of the pages into the data buffering storage device.

10. The data management method according to claim 7, wherein the threshold is smaller than a size of the page.

11. The data management method according to claim 7, wherein the amount of data is a difference between a maximum address value and a minimum address value of the remaining data.

12. The data management method according to claim 7, wherein the subsequent data subtract the target data is equal to the remaining data.

13. A data management method for a data storage device, comprising steps of:

receiving a read command from a host;

retrieving an address from the read command;

locating and outputting target data according to the address from a volatile data storage device;

determining whether remaining data stored in the volatile data storage device is greater than a threshold, wherein both of the target data and the remaining data are sequential data that belongs to a file and is stored in a page in a non-volatile data storage device; and

storing data from a subsequent page of the page into the volatile data storage device and incorporating the data into the remaining data if the determination is false.

14. The data management method according to claim 13, wherein the threshold is smaller than a size of the page.

15. The data management method according to claim 13, wherein the target and the remaining data are sequential data in terms of data reading.

16. The data management method according to claim 13, wherein the non-volatile data storage device is a flash memory and the volatile data storage device are dynamic random access memory (DRAM).

17. The data management method according to claim 13, wherein the target data is also stored in the non-volatile data storage device.

18. The data management method according to claim 13, wherein when the target data is located in the volatile data storage device, the target data is also stored in the non-volatile data storage device.

19. A data storage device, comprising:

a non-volatile data storage device for storing data; and

a memory controller, electrically coupled to the non-volatile data storage device for outputting target data obtained from a page in the non-volatile data storage device, for storing subsequent data of the page into a volatile data storage device during processing of a read command, for determining whether an amount of a remaining data stored in the volatile data storage device is greater than a threshold when both of the target data and the subsequent data are stored in the page, and if the determination is false, for storing at least one data in a subsequent page of the page into the volatile data storage device and incorporating the at least one data into the remaining data, wherein the remaining data is a part of the subsequent data, and the subsequent page and the page are adjacently located in the non-volatile data storage device.

20. The data storage device according to claim 19, wherein the target data and the subsequent data have a sequential relationship in terms of data reading.