The Library is currently in the process of being upgraded from Oracle Database Version to 220.127.116.11
and version 18.0 is going to be available soon.
Demos are being upgraded to reflect the new Container paradigm as well as EBR (Edition Based Redefinition) and may contain references to CDBs, PDBs,
and other objects you may not be familiar with such as CDB_OBJECTS_AE:
Welcome to 12c and beyond.
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... scroll down the page and you will find links to the largest collection of Oracle Database demos on the net.
The kfed is an undocumented utility located at $ORACLE_HOME/bin that can be used to support ASM deployments.
The kfed does not depend on the mount state of an ASM instance or ASM disk group, so it can be used with ASM instance down and on a disk group that does not mount.
KFED can also be used on ASM disks with corrupt ASM metadata.
unable to open file '<file_path_and_name>' corresponds to ORA-15031
ASM Library Specification
AU number to examine or update
Allocation Unit size in bytes
Block number to examine or update
Metadata block size in bytes
Update checksum before each write
CH/KSUM=<YES | NO>
Count of AUs to process
ASM device to examine or update
Don't suppress releated lines when dumping corrupt blocks