[server data recovery] a data recovery case in which multiple hard disks are disconnected and the server crashes due to water ingress in the server

Server data recovery environment ：

A brand of server storage + Multiple storage array cabinets ;

Hard disk near 100 block ;

near 20 Group lun.

Server failure conditions ：

Water leakage in the computer room leads to... In the server 8 Hard disks are disconnected at the same time , Server crash . The server administrator shall contact the data recovery center to go to the site for data rescue .

Server fault detection ：

Data recovery center arrangement 2 Server data recovery engineer and 1 A server hardware engineer went to the site for server fault detection , After arriving at the site, the data recovery engineer found that a group of storage cabinets in the machine room were not powered on , After communicating with the server administrator, I learned that ： Two servers on the upper layer of the cabinet failed due to water seepage from the ceiling of the machine room , One of them works normally after maintenance , But the other server was completely damaged . The server data recovery engineer detects the failed server , The fault conditions are as follows ：

There are several groups in this completely damaged server mdisk Added to a pool , And this pool can no longer be loaded through the normal way , The specific fault conditions can be seen in the figure below ：

Server data recovery process ：

1、 After careful inspection of the server , The server hardware engineer detects the physical fault of the disconnected hard disk , For the water disk with physical failure, open it in a dust-free environment , Clean the disc cavity 、 dry 、 Repair and other operations , Restore the flooded failed hard disk to a state readable on the data recovery device , And make a mirror backup of it .

2、 Mirror backup the hard disk without physical failure in the server , Mirror all data to a dedicated storage pool for data recovery .

3、 After the server data recovery engineer analyzes the image file , The storage mode of the original server array is obtained 、 Block size , Basic information such as strip size . Use the acquired array information to reorganize the array in the dedicated storage pool for data recovery in North Asia , Then restore the mirrored data to the virtual array , The administrator verifies the reorganized data .

4、 After the computer room administrator personally verifies the reorganized array , Confirm that all recovered data is complete and available , Approve the data recovery results .

5、 Rebuild the server environment of the computer room , The data recovery engineer migrates the data back to the server in the computer room , The data recovery is completed .