RAID5 failure data recovery case

Case:
Customer company’s video collection server, because the two sets are offline, causing RAID to fail.

Solution:
RAID has a large number of videos and pictures and animation files. The data is very important. Customers contact us and start to recover.RAID consists of 3 SATA 500G disks. After analysis, one plate is offline, and there are a small amount of bad ducts. RAID is converted into a dynamic disk and only one partition.At first I thought it was an ordinary RAID. After the reorganization, the data was not normal. After calculation, the data was found after it was found that the data was excluded. It can be determined that this raid is special direction, and it is special left synchronization, which is relatively rare.The last result is: direction: special left synchronization.Block size: 128 sectors.After the reorganization, several Office files of more than 10 m and several G AVI data are normal, and this RAID recovery is successful.