Case:
Customers are stored in IBM DS3400 optical fiber, with a total of 10 hard disks. Each hard disk is RAID5 made of 450G. The server is Redhat Linux. A set of RAID5 is made.The partition format is EXT3, which stores about 3T DCOM Hospital -specific format files.Due to the loss of RAID information, the data cannot be accessed.
Solution:
After testing, we conducted sector -level mirrors for 10 hard disks. Except for a large number of bad disks 10 hard disks, the other 9 hard disks were normalized to analyze the original RAID5 parameters. After manual calculation, the disk sequence and rotation method soon determined the disk sequence and rotation method.And verification methods, starting sectors and other parameters.The autonomous tools are directly analyzed, and all the data of the customer can be seen.