5.28 RC_DATABASE_BLOCK_CORRUPTION

This view gives information about database blocks that were corrupted after the last backup. It corresponds to the V$DATABASE_BLOCK_CORRUPTION view, which is populated in real time with corruption information.

Column	Data Type	Description
DB_KEY	NUMBER	The primary key for the database. Use this column to join with almost any other catalog view.
DBINC_KEY	NUMBER	The primary key for the current incarnation. Use this column to join with RC_DATABASE_INCARNATION.
FILE#	NUMBER	The absolute file number of the data file.
BLOCK#	NUMBER	The block number of the first corrupted block in this range of corrupted blocks.
BLOCKS	NUMBER	The number of corrupted blocks found beginning with BLOCK#.
CORRUPTION_CHANGE#	NUMBER	For media corrupt blocks, this value is zero. For logically corrupt blocks, this value is the lowest SCN in the blocks in this corrupt range.
CORRUPTION_TYPE	VARCHAR2(9)	The type of block corruption in the data file. Possible values are: ALL ZERO. The block header on disk contained only zeros. The block may be valid if it was never filled and if it is in an Oracle7 file. The buffer is reformatted to the Oracle8 standard for an empty block. FRACTURED. The block header looks reasonable, but the front and back of the block are different versions. CHECKSUM. The optional check value shows that the block is not self-consistent. It is impossible to determine exactly why the check value fails, but it probably fails because sectors in the middle of the block are from different versions. CORRUPT. The block is wrongly identified or is not a data block (for example, the data block address is missing) LOGICAL. Specifies the range for logically corrupt blocks. NOLOGGING. The block does not have redo log entries (for example, NOLOGGING operations on primary database can introduce this type of corruption on a physical standby)