Granted Patent B2

US 12,488,854 · App. 18/226,370 · Granted Dec 2, 2025

Inventors: Niles Yang (Mountain View, CA); Judah Gamliel Hahn (Ofra, IL)

Assignee: Western Digital Technologies, Inc.

G11C29/44G06F16/2365

Abstract

Claims (55)

1 . A data storage device comprising:

a memory; and

a processor configured to communicate with the memory and further configured to:

receive, from a host, a command to read data from the memory, wherein the command comprises a data integrity level set by the host based on an amount of time after which the data will be obsolete;

read the data from the memory;

estimate a syndrome weight of the data read from the memory;

determine whether the syndrome weight is lower than the data integrity level set by the host;

in response to determining that the syndrome weight is lower than the data integrity level set by the host:

send the data to the host without performing an error correction operation on the data, which reduces read latency; and

receive, from the host, a request to re-read the data with a higher data integrity level in response to the data sent to the host not meeting a quality of service requirement; and

in response to determining that the syndrome weight is not lower than the data integrity level set by the host:

perform an error correction operation on the data until the syndrome weight is lower than the data integrity level set by the host; and

send error-corrected data to the host.

2 . The data storage device of claim 1 , wherein the processor is further configured to perform a read scrub operation on the data.

3 . The data storage device of claim 1 , wherein the data integrity level is received from the host via a customized protocol.

4 . The data storage device of claim 1 , wherein the data integrity level is also based on a customer need.

5 . The data storage device of claim 1 , wherein the type of the data comprises video.

6 . The data storage device of claim 1 , wherein the type of the data comprises audio with a noise level above a threshold.

7 . The data storage device of claim 1 , wherein the processor is further configured to write the data to the memory using a write parameter configured to reduce write latency.

8 . The data storage device of claim 7 , wherein the write parameter comprises a memory parameter.

9 . The data storage device of claim 7 , wherein the write parameter comprises a write speed.

10 . The data storage device of claim 7 , wherein the write parameter comprises a parity.

11 . The data storage device of claim 7 , wherein the write parameter comprises a bit-ignore value.

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

13 . A method comprising:

performing in a data storage device comprising a memory:

receiving, from a host, a command to read data from the memory, wherein the command comprises a data integrity level set by the host based on an amount of time after which the data will be obsolete;

reading the data from the memory;

estimating a syndrome weight of the data read from the memory;

determining whether the syndrome weight is lower than the data integrity level set by the host; and

in response to determining that the syndrome weight is lower than the data integrity level set by the host:

sending the data to the host without performing an error correction operation on the data, which reduces read latency; and

receiving, from the host, a request to re-read the data with a higher data integrity level in response to the data sent to the host not meeting a quality of service requirement; and

in response to determining that the syndrome weight is not lower than the data integrity level set by the host:

performing an error correction operation on the data until the syndrome weight is lower than the data integrity level set by the host; and

sending error-corrected data to the host.

14 . The method of claim 13 , further comprising performing a read scrub operation on the data.

15 . The method of claim 13 , wherein the data integrity level is received from the host via a customized protocol.

16 . The method of claim 13 , wherein the data integrity level is also based on a customer need.

17 . The method of claim 13 , wherein the type of the data comprises video.

18 . The method of claim 13 , wherein the type of the data comprises audio with a noise level above a threshold.

19 . The method of claim 13 , wherein the data integrity level is also based on a performance need.

20 . A data storage device comprising:

a memory; and

means for:

receiving, from a host, a command to read data from the memory, wherein the command comprises a data integrity level set by the host based on an amount of time after which the data will be obsolete;

reading the data from the memory;

estimating a syndrome weight of the data read from the memory;

determining whether the syndrome weight is lower than the data integrity level set by the host; and

in response to determining that the syndrome weight is lower than the data integrity level set by the host:

sending the data to the host without performing an error correction operation on the data, which reduces read latency; and

receiving, from the host, a request to re-read the data with a higher data integrity level in response to the data sent to the host not meeting a quality of service requirement; and

in response to determining that the syndrome weight is not lower than the data integrity level set by the host:

performing an error correction operation on the data until the syndrome weight is lower than the data integrity level set by the host; and

sending error-corrected data to the host.

Assignments (3)

Continuity (2)

References Cited (21)