Shulou(Shulou.com)06/03 Report--

This article mainly introduces "how to solve the server failure". In the daily operation, I believe that many people have doubts about how to solve the server failure problem. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubt of "how to solve the server failure"! Next, please follow the editor to study!

What are the common server failures?

Hardware failure. Common server hardware failures include disk damage, battery failure and so on.

There is a software problem. For example, operating system crashes, unknown program running errors and so on.

Virus destruction. Blackmail virus encryption, delete service data, etc.

Uncontrollable power. Damage and data loss caused by equipment flooding, fire, collapse, etc.

Misoperation. Data loss caused by personnel errors, such as formatting, deletion, overwriting, etc.

How to reduce or avoid server failures?

Regular maintenance and maintenance. The performance of the server hardware is affected by the service life, regular maintenance and maintenance of the equipment can find all kinds of situations that may fail in time. For example, slow reading and writing of hard disk, abnormal noise, dropping of hard disk in array and so on are all precursors of imminent failure.

Customize the server contingency plan. A set of contingency plan can be customized, such as backup server, emergency power supply, redundant memory, etc., which can be enabled immediately when the server stops running to avoid affecting the business.

Update the software regularly. The operating system and software in the server can be updated regularly to make security protection and avoid virus attacks.

Create an event log. Strictly monitor the operator and operation content, and realize automation as much as possible.

How to recover if something goes wrong?

Server failure is preventable but uncontrollable, and failure is inevitable. How to recover after failure.

In case of failure, the emergency mechanism should be enabled first, the backup server will be online, and the failed server will be replaced.

Troubleshoot faults and carry out maintenance.

If the data on the server has been destroyed, you should shut down the server, back up the server data and perform professional data recovery operations to restore the server data.

HP DL380 server RAID information loss case sharing!

The server shared this time is HP DL380 series, the storage is RAID5 composed of 6 73GB SAS hard drives, and the operating system is WINDOWS 2003 SERVER, which is mainly used as a file server within the enterprise department. The host (without UPS) experienced several unexpected power outages before the failure, and RAID reported an error after restart, indicating that the storage device could not be found. After entering the RAID management module, the operation crashed, and the problem still could not be solved after reboot.

It is not uncommon for RAID modules to be damaged (including RAID management information loss and RAID module hardware damage) caused by accidental power outage of the mainframe. Generally speaking, after the creation of RAID, the information of its management module will not be changed, but after all, this information is modifiable. Accidental power outages can easily cause this information to be tampered with or even lost, and multiple power outages may even lead to damage to the components on the raid card. As a result, the host loses the middle layer module for RAID management of multiple physical hard disks. In this case, the operation crash of the RAID module is most likely caused by the raid card hardware damage (later verified by the HP after-sales technical staff). At this time, it is impossible to obtain the data in the 6 hard drives through the normal way, and can only rely on the third party to provide data recovery services to solve.

What is the process of data recovery?

1. First of all, a strict physical test is carried out on the six SAS hard drives provided by the user, and the reading status of the six hard drives is good.

two。 Mirror 6 hard disks in the user failure RAID group respectively. In order to ensure absolute data security, the target storage is array storage with redundant function.

3. After the mirror image is completed, the RAID structure of the 6 backup files is analyzed, and the disk order, block size and verification mode of the 6 hard disks are determined according to the file system storage rules, and the RAID group is reconstructed in the virtual environment.

4. After logically checking the data in the constructed RAID to ensure that the parameters applied in the refactoring RAID are correct, complete verification is carried out against the data that users are most concerned about.

5. After the user confirms that the data recovery result has fully reached the expected (the data is restored to the pre-failure state), all the user business data are migrated to the user storage, and the data recovery is complete.

Tips

1. Try to ensure a stable power supply in the computer room, so as to reduce the impact of abnormal power supply on the host and storage

two。 It is best to configure UPS for important servers and storage, which can ensure that the core business system can continue to work normally for a certain period of time in case of accidental power outage in the computer room, thus winning valuable time for enterprises to seek emergency solutions.

3. The security status of the server that has been in service for a long time should be checked regularly, and its overall operation status should be evaluated to determine whether to upgrade the hardware and system comprehensively, and to formulate an emergency plan to deal with sudden data disasters in advance to reduce business losses caused by data disasters.

As a kind of high-speed operation and long-time running equipment, there are relatively many failures in the server, but we can minimize or avoid the server failure in the process of use. we can also choose data recovery means to protect the data in the server and reduce the loss after the server failure.

At this point, the study on "how to solve the server failure" is over. I hope to be able to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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