Shulou(Shulou.com)06/03 Report--

Server data recovery user: a university in Jiangxi Province

Server data recovery failure description:

Users use a dawning model 16-bit optical fiber storage cabinet, and the underlying storage medium is 16 600GB optical disks, which are made into two sets of RAID5 disk arrays, with 7 disks in each group of raid, and the other two disks as global hot spare disks.

The first set of RAID disk arrays consists of three LUN assigned to one linux host, one sun minicomputer, and one esxi host. The second set of RAID is all given to one ESXI5.0 host, which stores data from about 10 virtual machines.

Server disk array failure occurs:

Storage disk alarm, server storage factory technicians to replace the raid disk array, and optimize the storage, delete all VG when optimizing storage, import backup information, the second group of RAID is prompted to initialize after being identified by the ESXi host.

Raid disk array data recovery scheme analysis and data recovery process:

The failed raid array synchronized the data after replacing the disk, and the VG information was deleted and the data synchronization was aborted. The RAID is a new RAID array after the backup VG information is imported by the operation and maintenance staff. generally speaking, once the data is synchronized, the new raid array will be synchronized into a blank disk and the data cannot be recovered. Fortunately, the technical staff of the manufacturer turned off the data synchronization function for the sake of safety, and it was this operation that saved the data, otherwise the data of the server would suffer irreversible damage. The customer will bring all the disks to our company, and then the engineer will mirror all the disks to the secure storage separately, and then will no longer operate the original disk to ensure the originality of the user's disk. Analyze the underlying structure, reconstruct the original RAID, virtual reorganize the RAID, mirror to the temporary storage again, use the VMWare ESX data recovery software: Frombyte Recovery For ESX, can see all the data normally, hang the recovered storage to the ESXi server, verify that all the virtual machines can start normally, and the data is no problem.

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