Granted Patent B2

US 12,253,940 · App. 17/686,620 · Granted Mar 18, 2025

Inventors: Ronak Jain (Karnataka, IN); Rohit Prasad (Karnataka, IN); Ramanathan Muthiah (Karnataka, IN)

Assignee: Sandisk Technologies, Inc.

G06F12/0253G06F3/0604G06F3/0659G06F3/0679G06F2212/7205

Abstract

Claims (66)

1. A data storage device comprising:

a memory; and

a processor configured to:

inform a host of a workload of the data storage device;

determine whether a command received from the host specifies a parameter of an upcoming burst mode, wherein the host is configured to specify the parameter in response to determining, based on the workload, that the data storage device will not provide a sufficient burst range required by the host;

in response to determining that the command does not specify the parameter of the upcoming burst mode:

relocate data stored in single-level cell (SLC) blocks dedicated for burst mode; and

perform a garbage collection operation;

in response to determining that the command does specify the parameter of the upcoming burst mode:

determine whether an available number of SLC blocks is sufficient to satisfy the parameter of the upcoming burst mode;

in response to determining that the available number of SLC blocks is sufficient, relocate data stored in the available number of SLC blocks;

in response to determining that the available number of SLC blocks is not sufficient:

add spare SLC blocks to the available number of SLC blocks to satisfy the parameter of the upcoming burst mode; and

relocate data stored in the available and added numbers of SLC blocks; and

in response to receiving an explicit host directive:

clean-up logical-to-physical address delta data; and

flush a logical-to-physical address cache to clear the logical-to-physical address cache for the upcoming burst mode.

2. The data storage device of claim 1 , wherein:

the parameter comprises a length of time of the upcoming burst mode.

3. The data storage device of claim 1 , wherein the parameter specifies a number of SLC blocks.

4. The data storage device of claim 1 , wherein power to the data storage device is guaranteed by the host for an amount of time needed to perform the garbage collection operation.

5. The data storage device of claim 1 , wherein the processor is further configured to perform the garbage collection operation in response to determining that the memory does not have enough available space.

6. The data storage device of claim 1 , wherein the memory comprises a three-dimensional memory.

7. A method comprising:

performing the following in a data storage device comprising a memory:

informing a host of a workload of the data storage device;

determining whether a command received from the host specifies a parameter of an upcoming burst mode, wherein the host is configured to specify the parameter in response to determining, based on the workload, that the data storage device will not provide a sufficient burst range required by the host;

in response to determining that the command does not specify the parameter of the upcoming burst mode:

relocating data stored in single-level cell (SLC) blocks dedicated for burst mode; and

performing a garbage collection operation;

in response to determining that the command does specify the parameter of the upcoming burst mode:

determining whether an available number of SLC blocks is sufficient to satisfy the parameter of the upcoming burst mode;

in response to determining that the available number of SLC blocks is sufficient, relocating data stored in the available number of SLC blocks;

in response to determining that the available number of SLC blocks is not sufficient:

adding spare SLC blocks to the available number of SLC blocks to satisfy the parameter of the upcoming burst mode; and

relocating data stored in the available and added numbers of SLC blocks; and

in response to receiving an explicit host directive:

cleaning-up logical-to-physical address delta data; and

flushing a logical-to-physical address cache to clear the logical-to-physical address cache for the upcoming burst mode.

8. The method of claim 7 , wherein the command specifies a duration of time of the burst mode.

9. The method of claim 8 , wherein the duration of time is determined from a plurality of expected burst times from a plurality of applications running on the host.

10. The method of claim 8 , wherein the duration of time is determined from an application usage pattern.

11. The method of claim 8 , wherein the duration of time comprises expected boot sequence time.

12. The method of claim 7 , wherein the parameter of the upcoming burst mode comprises an amount of available storage space that needs to be created.

13. The method of claim 12 , further comprising calculating the amount of available storage space that needs to be created from a duration of time of the burst mode.

14. The method of claim 7 , wherein the command is received during a non-peak workload.

15. The method of claim 7 , wherein the host guarantees power to the data storage device for an amount of time.

16. The method of claim 7 , wherein the command is received prior to a transition from one stage to another stage in a game application.

17. A data storage device comprising:

a memory; and

means for:

informing a host of a workload of the data storage device;

determining whether a command received from the host specifies a parameter of an upcoming burst mode, wherein the host is configured to specify the parameter in response to determining, based on the workload, that the data storage device will not provide a sufficient burst range required by the host;

in response to determining that the command does not specify the parameter of the upcoming burst mode:

relocating data stored in single-level cell (SLC) blocks dedicated for burst mode; and

performing a garbage collection operation;

in response to determining that the command does specify the parameter of the upcoming burst mode:

determining whether an available number of SLC blocks is sufficient to satisfy the parameter of the upcoming burst mode;

in response to determining that the available number of SLC blocks is sufficient, relocating data stored in the available number of SLC blocks;

in response to determining that the available number of SLC blocks is not sufficient:

adding spare SLC blocks to the available number of SLC blocks to satisfy the parameter of the upcoming burst mode; and

relocating data stored in the available and added numbers of SLC blocks; and

in response to receiving an explicit host directive:

cleaning-up logical-to-physical address delta data; and

flushing a logical-to-physical address cache to clear the logical-to-physical address cache for the upcoming burst mode.

18. The data storage device of claim 2 , wherein the processor is further configured to convert the length of time into a number of SLC blocks.

Assignments (8)

Continuity (1)

References Cited (15)

Cited By (1)

US 12,554,404