Case:
Yesterday, the client was the server of the Shenhua Group Branch. The three 500G SAS hard disks were connected to the RAID5 logic volume. The operating system was WSS 2003. There were two hard disks offline that caused the entire NAS system to work.Successful recovery, the original logic volume is divided into two regions, C and D. C is the system partition and can be reinstalled. D is the data area. Just export.
Solution:
The engineer of RAID data recovery believes that this is a classic RAID failure. When the RAID5 has 1 hard disk offline, because the system can work normally, it is not processed. After another hard disk is offline, RAID cannot continue to work.At the same time, because the post -offline hard disk is physical instability and cannot be forced to go online, it is impossible to use the HP RAID controller for data recovery.Just build a virtual RAID environment by manually and reorganize data with correct structure.After several engineers analyzed, began to perform specific operations 1. Do the full mirror of 3 hard disks.2. Analyze the RAID structure of the mirror to determine the sequence, block size, verification method, and early offline hard disk (this case is 1,3,2 64K block size, 321 dynamic verification method, No. 2 board early offline offline offlineTo.3. Make server data recovery and reorganization according to the obtained RAID structure, explain the file system, and export all data to another storage body.After a day of intense work, the data recovered at about 6 pm.Although it is difficult, after all, it has been done before, so the chest is made of bamboo.