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

This article shows you what to do when the server room is relocated and the server can not recognize raid. The content is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

[server data recovery failure description]

The computer room of a company in Beijing was relocated, and after reconnecting the line, it was found that the server could not recognize RAID and the server did not initialize. The client server is the LINUX operating system, and NFS+FTP is built to be used as the company's internal file server. The server model is HP DL380 G4. A domestic disk array is mounted with a hp smart array controller. The server disk array is composed of 14 146g SCSI hard drives to form a set of RAID5. The HP smart array series controller comes from Compaq, and the redundancy in RAID adopts double-cycle check mode.

[server initial check result]

Due to the customer's request and the server equipment is in Beijing, the engineer quickly arrived at the customer site and made a simple initial inspection of the equipment, and found that the reason for the data loss was the loss of raid information.

[raid data recovery steps]

1. Connect the SCSI hard disk cabinet directly to the SCSI expansion card that does not contain RAID function.

2. Then the engineers connect all the hard drives in the server array in a single disk on a dedicated (modified windows2003) repair platform.

3. In order to protect the customer's original data and avoid changing the customer's original data due to the data recovery operation, all hard drives must be fully mirrored in a read-only manner during all data recovery processes, and the images are also stored on devices with redundancy protection.

4. Arrange engineers to analyze the double-loop check parameters of the original RAID from the image file, and build a virtual raid platform.

5. Remove the offline disk on the virtual RAID platform and explain the file system. At this time, you can export raid data.

6. Connect the disk array on the customer's original HP server and reconfigure RAID.

7. It is best to transfer all data back to the new raid disk array through network dd, NFS, SAMBA, FTP, SSH and other data transfer methods.

[server data recovery results]

Of course, it took engineers a day and night to recover all the data in the server successfully.

The above content is the server room relocation so that the server can not recognize the raid what to do, have you learned the knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.