Case:
The entire storage space of a tumor hospital server consists of 12 1TB SATA hard disks, of which 10 hard disks form a RAID5 array, and the remaining two pieces are used to use it.Due to 2 hard disk damage in the RAID5 array, and at this time, only one heat disk was successfully activated, which caused the RAID5 array to be paralyzed, the upper LUN could not be used normally, and the data recovery company came to the door for data recovery.
Solution:
Data recovery company engineer testing: Storage is because some disks are dropped, which causes the entire storage to be unavailable. Therefore, after receiving the disk, it is physical testing all disks. After the detection, there is no physical failure. Then use the bad sector to detect the disk bad tract, and find that there is no bad channel. Considering the security and reducingability of data, it is necessary to backup all source data before doing data recovery to prevent the data from recovering again. Use Winhex to mirroring all disks into files. Since the sector size of the source disk is 520 bytes, it is also necessary to use special tools to convey all the data of all backup data and then make 520 to 512 bytes. After the following steps, recovery: 1. Analyze the cause of the fault, the RAID group structure, the RAID group drop disk, and analyze the LUN information in the RAID group. 2. Explain the ZFS file system and repair 3. Restore all data 4. Verify the latest data provided by the user with 3 2T SATA hard disks, copy all the restored data to these hard disks, and the total capacity of the data recovery is 5T. Because the environmental environment is good after the failure, it is not used to do related dangerous operations, which is greatly helpful for the later data recovery. Although the entire data recovery process encounters a lot of technical bottlenecks, it is also resolved. The entire data recovery project was completed within the expected time, and the recovery data users were also very satisfied.