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What is the process of successful data recovery in linux system? in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

I. the process of disk array failure

This time, the data recovery is carried out by a 2850 model server of a certain website. this server has a total of 6 hard drives, each with a capacity of 300GB, and the upper layer of the server is equipped with linux operating system and EXT3 file system. During the operation of the server, a hard disk is offline for unknown reasons, but because the array level of the server is raid5, the loss of a hard disk does not affect the normal operation of the server, until another hard disk is offline and the server system is paralyzed.

2. Mandatory online operation

After checking the array, the administrator could not determine the offline order of the two hard drives, so he had to choose one of the hard drives to try to force the online operation (forced online operation has certain risks, such as backup in advance). The administrator forced one of the hard drives online and found that the operating system was abnormal during startup. In order to avoid damaging the data, the administrator had to shut down the server and contact the data recovery agency for professional repair.

Third, fault analysis of data recovery

This kind of failure is often encountered in the data recovery operation, and many administrators find that it is not timely or do not deal with the first hard disk in time, which leads to the disconnection of two or more hard drives, so that the array will crash completely. At this time, the administrator can force the offline hard disk to go online, although it has a certain risk, it also has a certain degree of maneuverability.

But when forced online, it is best to be operated by an experienced administrator or data recovery engineer to avoid irreparable damage to the data, as is the case in today's case.

IV. Data recovery process

First of all, all the hard drives in the server are mirrored and backed up. In the backup process, in addition to the two hard drives that have been offline, there are also bad paths in other normal hard drives, but they are not offline, so there is no need for special treatment for the time being. After backup, the structure of the original raid array is analyzed, and the virtual raid environment is constructed. Because the administrator has forced the array to go online and destroyed part of the data structure, it is necessary for the recovery staff to manually repair the damaged part of the structure after verifying the raid structure, and then export all the data in the array. In this way, the data can be recovered successfully, and all you need to do is to rebuild the array and migrate it.

V. conclusion of data recovery

This data recovery took a total of 2 working days, and all data recovery was successful.

The answer to the question about the successful process of data recovery in linux system is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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