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2025-01-20 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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This article mainly introduces "how to solve the database storage equipment IBM DS5020 fault offline problem". In the daily operation, I believe many people have doubts about how to solve the database storage equipment IBM DS5020 fault offline problem. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for everyone to answer the doubt of "how to solve the database storage equipment IBM DS5020 fault offline problem". Next, please follow the editor to study!
According to the customer's description, the device is IBM DS5020, the RAID5 is made, the host operating system is AIX, the file system type is JFS2, and there are 16 optical fiber interface hard drives. Two hard drives in the storage array are offline, resulting in the failure of the RAID5 array and the inability of the system layer AIX minicomputer to access the data. The customer contacted the business staff of the North Asia data recovery Center, and the data emergency customer requested remote inspection to determine the status of the storage array.
After the inspection, the North Asia engineer gives the initial inspection plan and process:
Customer fault storage is IBM DS5020 storage device, a total of four sets of RAID 5 have been created, and no hot spare hard disk has been set. During the use of the equipment, two hard drives on one group of RAID 5 were offline due to failure, resulting in the failure of the RAID 5 and the inaccessibility of the data.
The main data that the customer needs db2 database data. Because the system layer is AIX operating system, it is difficult to recover data files, but it is not a big problem. The main reason is that we do not know whether the db2 database is damaged, and if the db2 database is damaged, we also need to repair the db2 database separately.
[data recovery process]
1. Pre-backup process: power off and shut down the original server. Prepare a recovery operation server (provided by North Asia), a backup storage (which can be provided by North Asia or users due to data sensitivity and other reasons), mount the failure storage as read-only on the recovery platform, and use the North Asia disk backup tool (or tools such as dd) to make a complete sector-to-sector backup. After the backup is complete, provide a detailed report on the health threat status and a list of possible bad channels. Return the original faulty storage to the user (it is recommended to restore it as is), and then no longer operate the original media directly.
2. Analyze in the backup data: analyze the key information of RAID stripe size, disk sequence and check direction. Judge the offline order of the two member disks. In the case of eliminating a faulty member disk, reorganize the RAID.
3. LVM structure detection and repair: generate all logical volumes in RAID. Analyze PV information and LVM pool information in logical volumes. The LVM structure is reorganized to obtain all the data LV.
4. File system detection and repair: analyze the data LV and determine the file system type (JFS2) in LV. Check the JFS2 file system structure in the data LV. Repair the file system.
5. Data recovery: get all the meta information in the JFS2 file system. Write a program to scan the JFS2 file system. Write a program to extract all the data files in the JFS2 file system.
6. Db2 database verification and repair: check the integrity and correctness of the restored db2 database files. If the db2 database is damaged, try to repair the db2 database.
[data recovery time and results]
The data recovery time is 3 days, and the data recovery is successful.
At this point, the study on "how to solve the offline problem of IBM DS5020 failure of database storage equipment" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
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