While an SQL statement was being processed, a read or write operation had to be performed on the data area or log area. This operation could not be executed successfully. The following reasons are possible:
1. A SHUTDOWN was performed in the meantime.
2. A disk is defective.
In some cases, the error message contains an additional description of the error which must be interpreted according to the operating system being used.
1. Use Database Manager to start the database instance.
2. Once the disk error has been corrected, the database instance must be restored.