Shulou(Shulou.com)05/31 Report--

This article mainly explains "how to fix the failure of server raid5 array". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to fix server raid5 array failure".

[Overview of server failure]

What is introduced today is the troubleshooting method after the server raid5 array crashes due to unknown reasons, as well as the server data recovery process. The following is a brief description of the hardware configuration of the server that needs to recover data:

The server model in this data recovery case is a brand X3850, and a raid5 disk array is set up on the server, which contains 4 member disks and 1 hot spare with a total of 5.

The server suddenly crashed after normal use. When the administrator checked the status of the raid array, he found that two hard drives in the array were offline and the hot spare was not enabled. Data recovery operations need to be performed at the server level.

[common process for server data recovery]

First shut down the server and ensure that the original server state is not destroyed or changed during troubleshooting and data recovery.

Remove the server after all the hard drives in the array are clearly encoded, mount the hard drives to the special storage device for server data recovery, and fully mirror all the hard disks in the raid5 array to restore the failed server state.

The raid structure of the mirrored server data is analyzed, and the basic information such as raid stripe information, stripe distribution law, raid array check direction and meta area of the disk array are extracted.

After obtaining the above array information, the server data recovery engineer virtually reassembled the same raid5 array environment on the dedicated data recovery server to further analyze the file system data of the virtual disk.

Verify and extract the analyzed data, and then use linux livecd or win pe (usually not supported) to migrate the data back after confirming that the data is correct.

[server raid5 data recovery process]

The data recovery engineer mirrors all the hard disks and analyzes the raid5 structure. The analysis shows that the best structure is 0min1 min2 min3, missing disk 3, block size 512 sectors, backward parity (Adaptec).

According to the common method of server data recovery, the data recovery engineer verifies the above data, and all the compressed packets can be decompressed normally and the structure is correct.

Virtual reassemble the raid5 array according to the structure of the raid array analyzed by the data recovery engineer, and the reassembled raid5 array has not found any error after verification.

The file system of the raid5 array is parsed and the data is extracted, and the extracted data is normal.

After validating the extracted data by the client server administrator, cooperate with the customer administrator to move all the recovered data back to the server prepared by the customer. After writing back, start the operating system for final data verification.

Thank you for reading, the above is the content of "how to repair the failure of server raid5 array". After the study of this article, I believe you have a deeper understanding of how to repair the failure of server raid5 array, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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