[server data recovery] data recovery cases of raid information loss caused by unexpected power failure of HP EVA server storage

Server storage data recovery environment ：

HP EVA A certain model stores ;

6 block SAS Hard disk composition raid5 array ;

WINDOWS SERVER operating system .

Server storage failure & analysis ：

Encounter two unexpected power cuts under normal working conditions , The administrator restarts the server storage ,raid Tips “ Unable to find storage device ”, Get into raid The management module crashes when viewing , Restart multiple times to enter raid The management module still fails , The administrator contacts our data recovery center for server data recovery .

Our data recovery engineers often encounter problems caused by accidental power failure raid Module hardware is damaged or riad Data loss caused by management information loss . Under normal circumstances ,raid Once created, the information in the management module will not be changed , But due to the raid The management module information is modifiable , One or more accidental power cuts may result in raid Management module information is tampered with or lost , Serious conditions may lead to raid The card element is damaged , This causes the server to RAID The managed m-server module is not available . This is the case of server storage failure in this case .

Server data recovery process ：

1、 The server data recovery engineer first physically detects all hard disks in the server , All hard disks of the server can be read normally . Mirror and backup all the hard disks of the server .

2、 Analyze the data of the image file , By analyzing the file system storage rules of failure storage, the data recovery engineer of North Asia server obtains the data stored in the server 6 Data block size of hard disk 、 Strip information 、 Disk sequence 、 Verification method and other information , Rebuild the virtual environment raid.

3、 To build RAID Logical verification of data in , Ensure that the reconstructed RAID The applied parameters are correct , Then fully verify the data that the server administrator is most concerned about .

4、 After the administrator confirms that the data recovery result is ok , Migrate all recovered data to the storage environment prepared by the administrator in advance , Data recovery completed .

Server storage data security tips ：

1、 Try to ensure stable power supply in the computer room , To reduce the damage of abnormal power supply to the server and storage .

2、 It's best to configure important servers and storage UPS, It can ensure that the core business system can continue to work normally for a period of time in case of unexpected power failure in the computer room , So as to win valuable time for launching emergency solutions .

3、 For servers that have been in service for a long time, the security status should be checked regularly , Evaluate the overall operation status to decide whether to comprehensively upgrade the hardware and system , At the same time, the emergency treatment plan for sudden data disasters shall be formulated in advance , To reduce the losses caused by data disasters .