Detecting and recovering a corrupted non-volatile random-access memory

Patent metadata

Field	Value
Publication number	US-11740969-B2
Application number	US-202217900247-A
Country	US
Kind code	B2
Filing date	Aug 31, 2022
Priority date	Apr 21, 2021
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

An information handling system includes a memory manager that may detect corruption of a non-volatile random-access memory, and perform a recovery process of the non-volatile random-access memory that includes determining whether a header of the non-volatile random-access memory is corrupted. If the header is not corrupted, then a data region associated with the header may be recovered from recovery data values in a spare store in the non-volatile random-access memory. If the header is corrupted, then the header and the data region may be recovered from default data values.

First claim

What is claimed is:

1. A method comprising:
detecting, by a processor, a corruption of a non-volatile random-access memory of an information handling system;
performing a recovery process of the non-volatile random-access memory that includes:
determining whether a header of the non-volatile random-access memory is corrupted; and
if the header is corrupted, then initializing system properties and regenerating the header based on a previous snapshot; and

rebooting the information handling system.

2. The method of claim 1 , further comprising notifying a storage component to reset memory variables to default values.

3. The method of claim 1 , wherein the recovery process further includes resetting complementary metal-oxide-semiconductor/embedded controller properties.

4. The method of claim 3 , wherein the resetting of the complementary metal-oxide-semiconductor/embedded controller properties is for aligning other memory variables to default values.

5. The method of claim 1 , wherein the recovery process is performed after failing to initialize a variable service.

6. The method of claim 1 , wherein the performing of the recovery process further includes regenerating a data region from snapshots taken of the data region prior to the corruption.

7. The method of claim 1 , wherein the corruption is detected after a reclaim operation of the non-volatile random-access memory.

8. An information handling system, comprising:
a non-volatile random-access memory device; and
a memory manager interfaced with the non-volatile random-access memory device, the memory manager configured to:
detect corruption of the non-volatile random-access memory device;
perform a recovery process of the non-volatile random-access memory device that includes:
determining whether a header of the non-volatile random-access memory device is corrupted; and
if the header is not corrupted, then initializing system properties and regenerating the header based on a previous snapshot; and

reboot the information handling system.

9. The information handling system of claim 8 , wherein the memory manager is further configured to notify a storage component to reset memory variables to default values.

10. The information handling system of claim 8 , wherein the memory manager is further configured to reset complementary metal-oxide-semiconductor/embedded controller properties.

11. The information handling system of claim 10 , wherein the reset of the complementary metal-oxide-semiconductor/embedded controller properties is to align other memory variables to default values.

12. The information handling system of claim 8 , wherein the recovery process is performed after a variable service failed to initialize.

13. The information handling system of claim 12 , wherein the recovery process further includes to regenerate a data region from bit patterns from snapshots taken of the data region prior to the corruption.

14. A non-transitory computer-readable medium including code that when executed performs a method, the method comprising:
detecting corruption of a non-volatile random-access memory of an information handling system;
recovering the non-volatile random-access memory that includes:
determining whether a header of the non-volatile random-access memory is corrupted; and
if the header is corrupted, then initializing system properties and regenerating the header based on a previous snapshot; and

rebooting the information handling system.

15. The method of claim 14 , wherein the method further comprises notifying a storage component to reset memory variables to default values.

16. The method of claim 14 , wherein the recovering further includes resetting complementary metal-oxide-semiconductor/embedded controller properties.

17. The method of claim 16 , wherein the resetting of the complementary metal-oxide-semiconductor/embedded controller properties is for aligning other memory variables to default values.

18. The method of claim 14 , wherein the recovering is performed after failing to initialize a variable service.

19. The method of claim 14 , wherein the recovering further includes regenerating a data region from bit patterns from snapshots taken of the data region prior to the corruption.

20. The method of claim 14 , wherein the corruption is detected after a reclaim operation of the non-volatile random-access memory.

Assignees

• Dell Products Lp

Inventors

• Moorthy Gowtham
• Kumar Mn Annappa
• Suryanarayana Shekar Babu

Classifications

• G06F11/1068 Primary

  in sector programmable memories, e.g. flash disk (G06F11/1072 takes precedence) · CPC title

• G06F11/0772

  Means for error signaling, e.g. using interrupts, exception flags, dedicated error registers · CPC title

• G06F11/1438

  Restarting or rejuvenating · CPC title

• G06F11/1471

  involving logging of persistent data for recovery · CPC title

• G06F2201/84

  Using snapshots, i.e. a logical point-in-time copy of the data · CPC title