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A data protection method, device and system

A data protection and asynchronous technology, applied in the direction of electrical digital data processing, hardware redundancy for data error detection, response error generation, etc., can solve the problems of data inconsistency, failure to achieve data protection, etc., and improve reliability Effect

Active Publication Date: 2015-09-30
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, the inventor found that in the above scenario, when the CPU fails to complete the ADR process due to an abnormality, the PCH will directly mark the completion of the ADR after the scheduled time arrives. Since the CPU has not successfully stored the data, the data protected by the NVDIMM Inconsistent with the data stored by the CPU, it cannot achieve the function of data protection

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  • A data protection method, device and system
  • A data protection method, device and system
  • A data protection method, device and system

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] In the prior art, the specific process of the ADR (Asynchronous Dram Refresh, asynchronous memory refresh) process is: the CPU (Central Processing Unit, processor) writes the data in the cache into the DRAM (Dynamic Random Access Memory, Dynamic Random Access Memory) ) and then configure the NVDIMM (Non-Volatile DIMM, non-volatile memory module) to self-refresh self-refresh mode, so that the NVDIMM completes the backup power switch and copies the DRAM da...

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Abstract

The embodiment of the invention discloses a data protecting method, device and system, and relates to the field of data protection. The reliability of the system for protecting data can be improved. The method comprises the steps that a PCH receives feedback information sent after a CPU completes ADR process; the PCH sends an ADR completion message to an NVDIMM after receiving the feedback information, wherein the ADR completion message is used for indicating the NVDIMM to conduct backup electricity switching and data protection. The data protecting method, device and system are applied to NVDIMM data protection.

Description

technical field [0001] The present invention relates to the field of data protection, in particular to a data protection method, device and system. Background technique [0002] Nowadays, in order to ensure the reliability of data in the storage system, a backup power unit is usually added to the storage system, so as to ensure that the memory data will not be lost when the power supply is abnormal and / or the storage system is abnormal. At the same time, the current mainstream backup point The unit is NVDIMM (Non-Volatile DIMM, non-volatile memory module). The NVDIMM is usually connected to a storage system through a common DIMM (Dual Inline Memory Modules, dual inline memory module) interface when protecting data. Therefore, when the power supply of the storage system is abnormal, the CPLD (Complex Programmable Logic Device, complex programmable logic device) generates an interrupt to the PCH (Platform Controller Hub, integrated south bridge) chip, and triggers the ADR (As...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/16G06F13/10
Inventor 胡爱玲杨景松
Owner HUAWEI TECH CO LTD