RAID5 hard drive corruption, how to recover data quickly

In the common RAID class disk array, RAID5 combines the advantages of RAID1 and RAID0 in data read and write, and is better at data security and speed. However, RAID5 also does not guarantee that data 100% security, such as hard disk damage, is one of the common causes of data loss. So RAID5 hard disk damage, how to quickly recover data?
First, we look at the characteristics of the disk array RAID5, RAID5 use at least three hard drives to implement the array, it can realize RAID0 acceleration function can also realize RAID1 backup data function, can be understood as a compromise of RAID0 and RAID1. The main features of RAID5 are: with parity, the reliability is strong, but the speed of writing data is slightly slower than writing to a single disk; at least three hard disks, the partition size for RAID must be almost the same.
In the case of a RAID5 of four hard disks, RAID5 does not back up the stored data, but instead stores the data and the corresponding parity information on each disk that makes up the RAID5, and the parity information and the corresponding data are stored on separate disks. When one of the RAID5 disk data is damaged, the remaining data and the corresponding parity information are used to recover the corrupted data. RAID5 disk array data loss for a number of reasons, or a RAID controller failure, or a sudden power outage caused by the RAID information error, may be RAID5 a hard disk error, not timely replacement, wait until the second hard disk error, resulting in RAID5 failure. For data loss caused by RAID hard disk damage, the lost data can be recovered as long as the method is properly done.
This reminds you that once a RAID array fails, do not attempt to rebuild, synchronize, or initialize the hard disk. Professional data recovery, such as the Day Shield Data Recovery Center of the engineers for the two-disk failure case of the solution is generally to view the existing information on the hard disk, through the calculation, to find out the original disk smooth, block size and other related information, manually simulate the original creation of the array state, so as to read all the data. After the RAID5 HDD double disk damage, the day Shield data Recovery Engineer recommends that individuals take steps to perform a full backup of a single disk and make a full backup of each drive a separate folder, search for the DBR sector, and determine the file record and check block based on the DBR parameters.

RAID5 hard drive corruption, how to recover data quickly