Case:
A RAID-5 array made by an IBM server at a city of IT service companies, a hard disk turned on red lights that the server could not run, so the data recovery company was found through Baidu search engine.
Solution:
After the data recovery received a simple description of the customer, the customer required the on -site server data to recover. After the data recovery engineers came to the door, they found that a hard disk had a failure of the server. The new hard disk was replaced by another hard disk during the synchronization process. The array could not run.After data recovery engineer’s virtual reorganization, the data was successfully restored.RAID-5 Storage principle: RAID-5 is commonly known as distributed strange coupling school inspection bands, which provides a set of redundant information P, allowing a hard disk to be offline without affecting the normal operation of the array.This method takes into account performance and security. It is the most widely used array mode, but the RAID-5 is not absolutely safe. When the data of RAID-5 is lost, 95%are manifested as two hard disks offline, and one of them is often offline.long time.This is because the user did not discover and eliminate the failure in time after the first hard disk was offline. When another hard disk was offline, the RAID mechanism was lost, and the array could not be accessed. At this time, it was too late to remedy.
