There is lots of inbuilt utilities in DB2 database to recover corrupt DB2 database. DB2 Control Center is one of easy inbuilt utility to take backup & restore corrupt DB2 database.
You can take backup in few clicks by using DB2 Control Center:
Just right click on the database you want to backup and choose the "Backup" option from the context menu.
The resulting DB2 backup wizard helps you create a backup task via a graphical interface.
Steps of restoration by using DB2 Control Center utility:
The DB2 Control Center provides a graphical interface for restoring your database. Choose the "Restore" option from the context menu to restore your corrupt database.
The resulting Restore Data Wizard walks you through the restoration process from a database image.
If you are not recover your corrupt db2 database by using this utility try another utilities or you can also try DB2 Database Recovery Software. These software have no limitations & recover db2 database in most possible causes of corruption. You can use these software very easily if you have no knowledge about these software.