Solution to complete recovery of Oracle database after system reinstallation

Yesterday, the server 1 disk failed unexpectedly, and the data of c disk was lost. After reinstalling the operating system, completely restore the data before the accident:

After reinstalling oracle completely according to the original configuration (installation path, instance name, user name and password), the oracle folder left before is completely copied to overwrite the newly installed oracle, and the database manager is started. The database is intact and the data is unscathed, including the previous job, which is completely restored, and the system code configuration does not need to be modified at all, which is very convenient.