What should I do if the server cannot recognize the raid due to the relocation of the server room

[Server data recovery failure description]
The computer room of a company in Beijing was relocated. After reconnecting the line, it was found that the server could not recognize RAID, and the server did not initialize. The client server is LINUX operating system, and NFS+FTP is constructed as the company's internal file server. The server model is HP DL380 G4, and a domestic disk array is mounted using the hp smart array controller. The server disk array is composed of 14 146G SCSI hard disks to form a group of RAID5. ,HP smart array series controllers are derived from Compaq, and the redundancy in RAID adopts double-loop check method. The administrator did not do any other tentative operations after a simple inspection of the server. The data recovery company first sent a server data recovery engineer to the customer site to conduct a preliminary inspection.

[Result of the initial inspection of the server]
Since the customer requested to come to the door and the server equipment was located in Beijing, the engineer quickly arrived at the customer site and performed a simple initial inspection of the equipment. It was found that the reason for the loss of data was the loss of raid information.

[raid data recovery steps]
1. First, connect the SCSI hard disk enclosure directly to the SCSI expansion card that does not contain RAID functions.
2. The engineers then connect all the hard disks in the server array in a single-disk manner on a dedicated (windows2003 refitted) repair platform.
3. In order to protect the original data of customers and avoid changing the original data of customers due to data recovery operations, all hard disks must be fully mirrored in read-only mode during all data recovery processes, and the mirroring is also stored in devices with redundant protection. superior.
4. Arrange engineers to analyze the original RAID double-loop check parameters from the image file, and build a virtual raid platform.
5. Remove the disks that have been offline earlier in the virtual RAID platform, and explain the file system. At this time, the raid data can be exported.
6. Connect the disk array to the customer's original HP server and reconfigure the RAID.
7. Finally, transfer all data back to the new RAID disk array through data transmission methods such as network dd, NFS, SAMBA, FTP, and SSH.

[Result of server data recovery]
All data in the server was successfully recovered, of course, it took engineers a day and night.
Server data recovery succeeded