Data storage device and method for providing video grade performance without memory overprovisioning or using extra hardware

Patent metadata

Field	Value
Publication number	US-12524183-B2
Application number	US-202418672327-A
Country	US
Kind code	B2
Filing date	May 23, 2024
Priority date	May 23, 2024
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A data storage device and method are disclosed for providing video grade performance without memory overprovisioning or using extra hardware. In one embodiment, a data storage device is provided comprising a memory and one or more processors. The one or more processors, individually or in combination, are configured to: receive a request from a host to perform a write operation in the memory; identify at least one partition of a plurality of partitions in the memory that does not require data reallocation during performance of the host write operation; and perform the host write operation in the at least one partition, wherein performing the host write operation in the at least one partition allows the write operation to be performed at a target write speed. Other embodiments are provided.

First claim

What is claimed is:

1 . A data storage device comprising:
a memory comprising a first partition and a second partition; and one or more processors, individually or in combination, configured to:
ensure that a free block count of at least one of the first and second partitions does not fall below a reallocation threshold;
receive a request from a host to perform a write operation in the memory;
determine whether only one or both of the first and second partitions have a free block count that is above the reallocation threshold;
in response to determining that both of the first and second partitions have a free block count that is above the reallocation threshold, using both the first and second partitions to perform the write operation, wherein the write operation is performed at faster than a guaranteed write speed; and
in response to determining that only one of the first and second partitions has a free block count that is above the reallocation threshold:
use the one of the first and second partitions that has a free block count that is above the reallocation threshold to perform the write operation, wherein the write operation is performed at the guaranteed write speed; and
perform reallocation on the one of the first and second partitions that does not have a free block count that is above the reallocation threshold.

2 . The data storage device of claim 1 , wherein the guaranteed write speed comprises a guaranteed sustained sequential write (SSW) speed.

3 . The data storage device of claim 2 , wherein the guaranteed SSW speed comprises 550 megabytes per second (MBps).

4 . The data storage device of claim 1 , wherein the write operation writes video data in the memory.

5 . The data storage device of claim 1 , wherein the write operation is performed at the guaranteed write speed without overprovisioning the memory.

6 . The data storage device of claim 1 , wherein the write operation is performed at the guaranteed write speed without using extra hardware resources.

7 . The data storage device of claim 1 , wherein the write operation is performed at the guaranteed write speed without using a sanitization process to erase contents of the memory.

8 . The data storage device of claim 1 , wherein the data storage device comprises an external/portable solid-state drive.

9 . The data storage device of claim 1 , wherein the host comprises a camera.

10 . The data storage device of claim 1 , wherein the memory comprises a plurality of memory dies.

11 . The data storage device of claim 1 , wherein the memory comprises a multi-level cell (MLC) memory.

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

13 . A method comprising:
performing in a data storage device comprising a memory partitioned into first and second partitions:
ensuring that a free block count of at least one of the first and second partitions does not fall below a reallocation threshold;
receiving, from a host, a request to perform a write operation in the memory;
determining whether only one or both of the first and second partitions have a free block count that is above the reallocation threshold; and
in response to determining that only one of the first and second partitions has a free block count that is above the reallocation threshold:
using the one of the first and second partitions that has a free block count that is above the reallocation threshold to perform the write operation, wherein the write operation is performed at a guaranteed write speed; and
performing reallocation on the one of the first and second partitions that does not have a free block count that is above the reallocation threshold.

14 . The method of claim 13 , wherein the memory comprises a plurality of memory dies, and wherein the write operation is performed using die parallelism.

15 . The method of claim 13 , wherein the data storage device comprises an external/portable solid-state drive.

16 . The method of claim 13 , wherein the host comprises a camera.

17 . The method of claim 13 , wherein the write operation is performed at the guaranteed write speed without overprovisioning the memory.

18 . The method of claim 13 , wherein the write operation is performed at the guaranteed write speed without using extra hardware resources.

19 . The method of claim 13 , wherein the write operation is performed at the guaranteed write speed without using a sanitization process to erase contents of the memory.

20 . A data storage device comprising:
a memory configured to be partitioned into a first partition and a second partition; and means for:
ensuring that a free block count of at least one of the first and second partitions does not fall below a reallocation threshold;
receiving a request from a host to perform a write operation in the memory;
determining whether only one or both of the first and second partitions have a free block count that is above the reallocation threshold;
in response to determining that both of the first and second partitions have a free block count that is above the reallocation threshold, using both the first and second partitions to perform the write operation, wherein the write operation is performed at faster than a guaranteed write speed; and
in response to determining that only one of the first and second partitions has a free block count that is above the reallocation threshold:
using the one of the first and second partitions that has a free block count that is above the reallocation threshold to perform the write operation, wherein the write operation is performed at the guaranteed write speed; and
performing reallocation on the one of the first and second partitions that does not have a free block count that is above the reallocation threshold.

Assignees

• Sandisk Technologies Inc

Inventors

• Sharma Amit
• Agarwal Dinesh Kumar

Classifications

• G06F3/0631

  by allocating resources to storage systems · CPC title

• G06F3/0679 Primary

  Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP] · CPC title

• G06F3/0613

  in relation to throughput · CPC title

• G06F3/061

  Improving I/O performance · CPC title

• G06F3/0644

  Management of space entities, e.g. partitions, extents, pools · CPC title