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This article introduces you what is the protection of Cache Battery, the content is very detailed, interested friends can refer to, hope to be helpful to you.

In RAID Controller, processor, memory and Cache Battery are three key components, which are related to the performance and security of Controller. Today we will discuss the technical issues of Cache Battery for the time being.

As we all know, storage devices store very critical data and business systems, and users use storage in order to protect data security and performance.

Therefore, a series of redundancy measures are adopted in storage devices to improve fault tolerance.

When stored at run time, memory generally uses mirror to protect running data. However, if the power is lost unexpectedly, even for a short time, it will result in the loss of unfinished data in memory. Manufacturers have adopted Battery to achieve data protection.

Compaq's MA8000 series of storage uses Cache battery to power the memory for about 70 hours. In the event of an unexpected power outage, Cache Battery will continue to power the memory to prevent the loss of data in the memory that is not written to the hard disk; after the storage system returns power to the hard disk, the written data will be written to the hard disk first.

However, if some of the in-memory transaction data itself is not completed, even if it exists in memory; the system will consider it to be invalid data, you need to clear all the in-memory data through the clear command of controller.

Dell's PV660F and 650F, as well as the CX series; are powered by SPS. But it works differently. After the system is powered off, the Battery of SPS will continue to power the Controller and DPE and let Controller continue to write the data in memory to the hard disk for about 3 minutes, which is enough. However, it can only power the data in the DPE; that is, if the target of writing the data is another DAE, it cannot be written. Only the data in the DPE is protected.

On the protection of Cache Battery what is shared here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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