RAID1 hard drive bad, system crash data recovery

RAID 1 is called disk mirroring: The data of one disk is mirrored on another disk, and the reliability and repairable of the system can be guaranteed without compromising the performance, it has high data redundancy, but the disk utilization is 50%, so the cost is the highest, and it is used in the case of saving critical important data.

First, RAID 1 has the following features:

(1), RAID 1 each disk has a corresponding mirror disk, at any time the data are synchronized mirroring, the system can be from a set of mirrors on any disk to read data.

(2), the disk can use space only half the total disk capacity, the system cost is high.

(3), as long as there is at least one disk in any pair of mirrors in the system can be used, and even in half the number of hard disk problems when the system can operate normally.

(4), a hard disk failure of the RAID system is no longer reliable, should promptly replace the damaged hard disk, or the remaining mirror disk also has problems, then the entire system will crash.

(5), after the replacement of the original data will take a long time to synchronize the image, the external access to the data will not be affected, but the performance of the entire system has declined.

(6), RAID 1 disk controller load is quite large, with multiple disk controllers can improve the security and availability of data.

Second, the matters needing attention:

1, because the server storage is generally important data, in the event of server data loss, please be careful to avoid the data caused two damage, serious situation made data permanent unrecoverable.

2, the server data loss, please immediately power off, contact the server after-sales center or Professional data Recovery Center detection, to ensure data security.

3, after the server array information is lost, remember not to perform rebuild reorganization operations (except if you do not need to recover data), otherwise the data may not be recoverable.

If there is any doubt about the matter, please contact: tel:13122808298 qq:4000076365 Data Recovery Center: http://www.tianduntech.com/Address: Shanghai Baoshan District Luxiang Road 111 Lane Greenland 1th Building 1210 Room

RAID1 hard drive bad, system crash data recovery