METHOD OF OPERATING DATA STORAGE DEVICE

• US 20150248250A1
• Filed: 11/04/2014
• Published: 09/03/2015
• Est. Priority Date: 02/28/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: HAN, IL SU, JO, KEUN SOO, CHO, HEE CHANG
• Granted Patent: US 9,933,974 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0652 Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]

Abstract

A method of operating a data storage device includes: receiving a single wipe device initialization command from a host, and in response to the wipe device initialization command, executing a wipe device initialization operation that during a single time period initializes the entirety of a mapping table defining logical partitions dividing memory space provided by a physical region of the data storage device.

Claims

1. A method of operating a data storage device, the method comprising:

receiving a single wipe device initialization command from a host; and

in response to the wipe device initialization command, executing a wipe device initialization operation that during a single time period initializes the entirety of a mapping table defining logical partitions dividing memory space provided by a physical region of the data storage device.

2. The method of claim 1, wherein the wipe device initialization operation further comprises:

further in response to the wipe device initialization command, erasing all of the data stored in the physical region after initializing the entirety of the mapping table.

3. The method of claim 2, wherein the wipe device initialization operation further comprises:

further in response to the wipe device initialization command, programming specialty data in the physical region after the erasing of all of the data stored in the physical region.

4. The method of claim 3, wherein the specialty data is one of all-zeros, all-ones, and a pattern of all-zeros and all-ones.

5. The method of claim 1, wherein the wipe device initialization operation further comprises:

communicating a completion response from the data storage device to the host indicating completion of the wipe device initialization operation.

6. The method of claim 5, wherein the wipe device initialization operation further comprises:

disabling in the data storage device any additional execution of the wipe device initialization operation.

7. The method of claim 6, wherein the disabling in the data storage device of any additional execution of the wipe device initialization operation comprises:

receiving in the data storage device a setup bit in response to receipt of the completion response by the host;

storing the setup bit in a write-once memory (WOM); and

disabling the additional execution of the wipe device initialization operation based on the setup bit stored in the WOM.

8. The method of claim 1, wherein the data storage device is a universal flash storage (UFS), and the wipe device initialization command has a format defined by a FORMAT UNIT command consistent with a UFS device.

9. The method of claim 1, wherein the wipe device initialization operation further comprises:

erasing all decryption keys stored in the physical region and to decrypt encrypted data stored in the physical region in response to the wipe device initialization command.

10. A method of operating a data processing system including an application processor and a data storage device, the method comprising:

communicating a single wipe device initialization command from the application processor to the data storage device; and

in response to the wipe device initialization command, executing a wipe device initialization operation that in one single period of time comprises at least one of;

initializing the entirety of a mapping table defining logical partitions dividing the memory space provided by a physical region of the data storage device;

erasing all of the data stored in the physical region after initializing the entirety of the mapping table; and

programming specialty data in the physical region after the erasing of all of the data stored in the physical region.

11. The method of claim 10, wherein the wipe device initialization operation further comprises:

communicating a completion response from the data storage device to the host indicating completion of the wipe device initialization operation.

12. The method of claim 11, wherein the wipe device initialization operation further comprises:

disabling in the data storage device any additional execution of the wipe device initialization operation.

13. The method of claim 12, wherein the disabling in the data storage device of any additional execution of the wipe device initialization operation comprises:

receiving in the data storage device a setup bit in response to receipt of the completion response by the host;

storing the setup bit in a write-once memory (WOM); and

disabling the additional execution of the wipe device initialization operation based on the setup bit stored in the WOM.

14. The method of claim 10, wherein the data storage device is a universal flash storage (UFS), and the wipe device initialization command has a format defined by a FORMAT UNIT command consistent with a UFS device.

15. The method of claim 10, wherein the wipe device initialization operation further comprises:

erasing all decryption keys stored in the physical region and to decrypt encrypted data stored in the physical region in response to the wipe device initialization command.

16. A method of operating a data storage device including a controller and a flash-based memory, the method comprising:

receiving a single command provided by a host in the controller of the data storage device, and analyzing the command; and

upon determining that the command is a wipe device initialization command, initializing the entirety of a mapping table defining logical partitions dividing memory space provided by a physical region of the data storage device, and

erasing all of the data stored in the physical region after initializing the entirety of the mapping table.

17. The method of claim 16, wherein upon determining that the command is a wipe device program command, initializing the entirety of a mapping table defining logical partitions dividing memory space provided by a physical region of the data storage device,

erasing all of the data stored in the physical region after initializing the entirety of the mapping table, and

programming specialty data in the physical region after the erasing of all of the data stored in the physical region.

18. The method of claim 17, wherein the entirety of the physical region is programmed with the specialty data.

19. The method of claim 16, further comprising:

communicating a completion response from the data storage device to the host indicating completion of the wipe device initialization operation.

20. The method of claim 19, further comprising:

disabling in the data storage device any additional execution of the wipe device initialization operation.