Selective background data refresh for SSDs

Patent metadata

Field	Value
Publication number	US-11137916-B2
Application number	US-201816021722-A
Country	US
Kind code	B2
Filing date	Jun 28, 2018
Priority date	Jun 28, 2018
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

An embodiment of a semiconductor apparatus may include technology to selectively determine a set of data for background refresh based at least in part on host-provided information, and refresh the determined set of data on a persistent storage media as a background operation. Other embodiments are disclosed and claimed.

First claim

We claim:

1. An electronic storage system, comprising:
persistent storage media; and
a controller communicatively coupled to the persistent storage media, the controller including logic to:
identify, from host-provided information, that a first page and a second page on the persistent storage media were previously scrubbed by a host,
conduct an identification that a third page on the persistent storage media was not previously scrubbed by the host,
determine that the second page is to be refreshed in a first background refresh operation based on one or more of a time period that has elapsed since the host scrubbed the second page, or a number of accesses to the second page,
selectively determine that the third page is to be refreshed in a second background refresh operation in response to the identification that the third page was not previously scrubbed by the host, wherein the background refresh operation is to detect whether the third page is corrupted,
determine that the first page is to be avoided for the background refresh operation in response to the first page being previously scrubbed by the host and based on one or more of a time period that has elapsed since the host scrubbed the first page, or a number of accesses to the first page, and
execute the first and second background refresh operations to refresh the second and third pages on the persistent storage media as a background operation.

2. The system of claim 1 , wherein the logic is further to:
identify the host-provided information based on information associated with a write operation initiated by the host.

3. The system of claim 2 , wherein:
the host-provided information is to include one or more of stream information associated with the write operation or queue information associated with the write operation; and
the logic is further to determine that the second page is to be refreshed in the first background refresh operation based on the time period that has elapsed since the host scrubbed the second page and the number of accesses to the second page.

4. The system of claim 1 , wherein the logic is further to:
set one or more flags based on the host-provided information, wherein the one or more flags are respectively associated with one or more pages of the persistent storage media; and
disable background data refresh for the one or more pages of the persistent storage media based on respective states of the corresponding one or more flags.

5. The system of claim 4 , wherein each of the one or more flags corresponds to a bit of the persistent storage media and wherein each of the one or more pages corresponds to a reclaim unit of the persistent storage media.

6. The system of claim 1 , wherein the persistent storage media includes a solid state drive.

7. A semiconductor apparatus, comprising:
one or more substrates; and
logic coupled to the one or more substrates, wherein the logic is at least partly implemented in one or more of configurable logic or fixed-functionality logic hardware, the logic coupled to the one or more substrates to:
identify, from host-provided information, that a first page and a second page on a persistent storage media were previously scrubbed by a host,
conduct an identification that a third page on the persistent storage media was not previously scrubbed by the host,
determine that the second page is to be refreshed in a first background refresh operation based on one or more of a time period that has elapsed since the host scrubbed the second page, or a number of accesses to the second page,
selectively determine that the third page is to be refreshed in a second background refresh operation in response to the identification that the third page was not previously scrubbed by the host, wherein the background refresh operation is to detect whether the third page is corrupted,
determine that the first page is to be avoided for the background refresh operation in response to the first page being previously scrubbed by the host and based on one or more of a time period that has elapsed since the host scrubbed the first page, or a number of accesses to the first page, and
execute the first and second background refresh operations to refresh the second and third pages on the persistent storage media as a background operation.

8. The apparatus of claim 7 , wherein the logic is further to:
identify the host-provided information based on information associated with a write operation initiated by the host.

9. The apparatus of claim 8 , wherein:
the host-provided information is to include one or more of stream information associated with the write operation or queue information associated with the write operation; and
wherein the logic is further to determine that the second page is to be refreshed in the first background refresh operation based on the time period that has elapsed since the host scrubbed the second page, and the number of accesses to the second page.

10. The apparatus of claim 7 , wherein the logic is further to:
set one or more flags based on the host-provided information, wherein the one or more flags are respectively associated with one or more pages of the persistent storage media; and
disable background data refresh for the one or more pages of the persistent storage media based on respective states of the corresponding one or more flags.

11. The apparatus of claim 10 , wherein each of the one or more flags corresponds to a bit of the persistent storage media and wherein each of the one or more pages corresponds to a reclaim unit of the persistent storage media.

12. The apparatus of claim 7 , wherein the persistent storage media includes a solid state drive.

13. The apparatus of claim 7 , wherein the logic coupled to the one or more substrates includes transistor channel regions that are positioned within the one or more substrates.

14. A method of controlling storage, comprising:
identifying, from host-provided information, that a first page and a second page on a persistent storage media were previously scrubbed by a host;
conducting an identification that a third page on the persistent storage media was not previously scrubbed by the host;
determining that the second page will be refreshed in a first background refresh operation based on one or more of a time period that has elapsed since the host scrubbed the second page, or a number of accesses to the second page;
selectively determining that the third page will be refreshed in a second background refresh operation in response to the identification that the third page was not previously scrubbed by the host, wherein the background refresh operation is to detect whether the third page is corrupted;
determining that the first page will be avoided for the background refresh operation in response to the first page being previously scrubbed by the host and based on one or more of a time period that has elapsed since the host scrubbed the first page, or a number of accesses to the first page; and
executing the first and second background refresh operations to refresh the second and third pages on the persistent storage media as a background operation.

15. The method of claim 14 , further comprising:
identifying the host-provided information based on information associated with a write operation initiated by the host.

16. The method of claim 15 , wherein:
the host-provided information includes one or more of stream information associated with the write operation or queue information associated with the write operation; and
the method further comprises determining that the second page is to be

Assignees

• Intel Corp

Inventors

• Mesnier Michael
• Karkra Kapil
• Wysocki Piotr
• Hughes Jonathan
• Watt Brennan
• Trika Sanjeev
• Ramalingam Anand

Classifications

• G06F3/0688

  Non-volatile semiconductor memory arrays · CPC title

• G06F3/0619 Primary

  in relation to data integrity, e.g. data losses, bit errors · CPC title

• G06F3/0679

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

• G06F3/0659

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• G06F3/0652 Primary

  Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket · CPC title