RAID disk array common failures and how to fix them

Server data security is of paramount importance, and most servers currently employ RAID disk array technology. By the server's own hardware limitations and technical personnel operating factors, the server no array can not do 100% of trouble-free occurrence. What are the RAID disk array failures? How does a RAID disk array perform data recovery?
The causes of the disk array RAID data loss include RAID logic layer failure, RAID physical layer failure and RAID bad layer failure.
For logical layer failures such as accidental deletion, mis-formatting, mis-partitioning, loss of RAID array information, confusion of RAID array information, data loss due to reconfiguration of RAID array information, failure of disk sequence in RAID array, etc., professional RAID disk array data recovery software developed by the day Shield can be used. Full raid 0,raid 5,raid 5E, RAID 5EE, and RAID 6 guarantee 100% recovery of disk array data as long as there are no initialization and unconventional rebuild operations on the disk array.
For the server physical layer failure, mainly refers to the server array SAS, SCSI hard disk due to the internal magnetic head or motor caused by the fault. The main performance is the hard drive power-on disk, hard drive power does not turn, hard disk power is not recognized. In this case, the general company technical personnel can not recover, need professional data recovery personnel to recover, may also involve the hard disk open recovery, it is recommended not to operate themselves, may contact the day Shield Data Recovery Center, by the engineer to diagnose the cause of the failure in the development of a recovery plan.
For RAID bad layer failure, mainly refers to the disk array SCSI, SAS hard disk due to one or more bad lanes caused by the operating system such as unable to boot, start the operating system blue screen, boot operating system crashes and other failures. Bad channel data can not be read, there is a bad path of the hard disk to do a full mirror, only after the mirror is completed, to proceed to reorganize the hard disk array, and then export data.
To achieve a high rate of data recovery, there are three points to note. First, when the server has failed, we should not do any operation on the server, but also should not arbitrarily remove the hard disk, so as to avoid disorderly order to increase the later data recovery difficulty. Second, if you have removed the hard drive, be sure to mark the hard drive in the order. Third, find the server data recovery Company's professional server data recovery engineers, such as Shanghai Day Shield Data Recovery Center , has technical equipment protection, data recovery more secure.

RAID disk array common failures and how to fix them