Database connection error database repair

Case:
The database was used normally the day before. When I used it yesterday, I found that I couldn’t connect to the database. I couldn’t try it several times.

Solution:
The Oracle 6G database stored on this hard disk is unable to access the data due to the hard disk bad sectors. The engineer uses professional data recovery tools PC3000-UDMA to mirror the data on the hard diskThen use the professional database to recover the software to successfully restore the data under the folder, but the time to report an error when verifying the data adding a database. It is inferred that the data of the database part of the database is damaged. Therefore, the engineer used a professional database to repair software., Customer verification The database is very satisfied.