Shulou(Shulou.com)06/02 Report--

Device Information:

Fault performance: first, a hard disk fails offline, the hot spare enables replacement, and another disk fails offline in the same group of Mdisk as the offline disk. As a result, the synchronization of hot spares fails, and this set of Mdisk becomes invalid, which in turn affects the entire general-purpose volume, and the general-purpose volume cannot be used.

Analysis of data recovery probability: since the failure of the entire array is caused by disk failure, the possibility of data recovery is very high if the disk is slightly damaged. In this case, the data needed by the customer is mainly dcm image files, so it is expected that 95% of the data can be recovered.

Technical process:

1. Data needs to be backed up in the early stages of data recovery to avoid changes to the original state of the data during data recovery.

a. The Prime Minister shut down the server and cut off the power.

b. There is a need for a server for data recovery operations and a storage for backing up data (because the customer's data is required to be kept confidential, the storage device is provided by the customer). We will mount the fault storage on the data recovery platform, which must be mounted read-only and then back up the sector (usually using our company's own software or tools such as dd).

c. After the backup is completed, issue a detailed report on the health status of prestige and a list of possible bad ways.

d. Restore the original failure storage to the original state and return it to the user, and all subsequent data recovery operations do not involve the customer's original failure equipment.

two。 Analyze and reassemble Mdisk

a. First of all, the hard disk needs to be classified according to the Mdisk group according to the original configuration information communicated by the customer.

b. Through the analysis of all the hard drives in each group of Mdisk, the relevant raid information is obtained.

c. Virtual reorganization of Mdisk, this part can only be carried out using professional data recovery software.

3.pool analysis

a. Through the detailed analysis of all the Mdisk, we get the relevant information about pool.

b. Virtual reorganization of pool, also need to use professional data recovery software for operation.

4. Repair the file system

a. Verify the correctness and integrity of the NTFS file system.

b. Repair the NTFS file system.

5. Parse the file system and extract data

a. Parse the NTFS file system.

B . Generate all the data in the volume.

6. Validate data

This step requires the user to verify the recovered data, if there is no problem, the data recovery is complete, and if new problems are found, re-verify all the above data recovery process.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.