Case:
The customer server consists of 8 hard disks a set of RAID5. A few days ago, the server was inexplicably unable to start. After viewing by the technicians, all the hard disks on the array were online.But when it starts, it is prompted to find the array.Unable to start.Customers contact the data recovery center through Dell customers.
Solution:
Data recovery engineer testing, RAID5 can theoretically reduce a hard disk, and RAID fails to get off at least two hard disks.However, one of the hard disks may be dropped at a certain time before one of them, one month, or even a year ago, it is possible.It’s just that RAID can be used normally, so most technicians have not found it.Display the hard disk online when viewing the tool, but repeatedly restart after falling or re -insert the hard disk and re -launched.But it does not mean that RAID is intact.Because the hard disk data is not synchronized after the launch, RAID is still invalid. At this time, do not do synchronous operations.Otherwise, the data may not be opened after the data is inconsistent after synchronization, and all damage is damaged.This group of RAID hard disks has a bad sector, causing the unable to read normally to drop, and the other hard disk is dropped normally this time.The engineer damaged the hard disk data through a certain algorithm, reappeared the correct RAID, and launched the entire set of RAIDs, and the data recovered successfully.