Useful tips for recovering RAID disk array data

RAID disk array devices, which often encounter some common failures during use, also bring a lot of hard-to-estimate data risk beyond the applications that bring us massive storage space. This article will focus on RAID data recovery common failures and related processing methods.

First, RAID basic knowledge

The simple explanation for a RAID disk array (redundant array of independent Disks) is that n drives are combined into a virtual single large-capacity hard drive using a raid Controller (sub-hardware,software) It is characterized by the simultaneous read speed of n hard drives and the provision of fault-tolerant fault tolerant, so raid is considered as the main access to data storage is not backup solution.

A basic concept in RAID is called EDAP (Extended Data availability and Protection), which emphasizes extensibility and fault tolerance mechanisms, and is also a manufacturer such as: Mylex,ibm,hp,compaq,adaptec, The focus of infortrend and other demands, including the following actions can be handled without the need for downtime:

RAID disk array supports automatic detection of failed hard drives.

RAID disk array supports rebuilding hard drive bad track data.

RAID disk arrays support hot Spare for hard drives that do not require downtime.

RAID disk arrays support the replacement of hot Swap with hard drives that do not require downtime.

RAID disk array supports expansion of HDD capacity.

Second, common RAID data recovery failure and recoverability analysis

1. Software failure:

A. Sudden power outage causes loss of data recovery for RAID disk array card information.

B. Reconfigure the RAID array information, resulting in data loss recovery.

C. If there is an error in the disk order, the system will not recognize the data.

D. Accidental deletion, mis-formatting, mis-partitioning, mis-cloning, file decryption, poison damage and other data recovery work.

2. Hardware damage:

A.raid typically have several hard disks, one of which is damaged and the data cannot be read.

B.raid a bad way, resulting in data loss, this recovery rate is relatively large.

C. If the hard disk at the same time more than two pieces of damage, recovery work is very complex, the success rate is relatively low.

Third, RAID data recovery failure considerations

1, data loss, the user must not do any operation on the hard disk, the hard disk in order to remove, with the mirror software to make each hard disk image file, can also be sent to the Professional data Recovery Center.

2, do not rebuild the RAID card operation, otherwise it will increase the difficulty of recovering data.

3. Mark the order of the hard disk above the raid card.

4, if there is a problem, you can call the Professional Data Recovery Center of the consultation telephone to find professional engineers to consult, avoid yourself trying to repair, unless you are sure that you have sufficient skills and experience to deal with the data risk. Here we recommend Shanghai Day Shield Data Recovery Center, with the most professional team, will be able to help you solve the problem of disk array data recovery.

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

Useful tips for recovering RAID disk array data