What does it mean if a backup is expired?
A.
The backup set has exceeded the retention criteria set in RMAN and is eligible for removal.
B.
The backup set has one or more invalid blocks in it and is not usable for recovery.
C.
The backup set contains one or more tablespaces no longer in the database.
D.
The backup set contains one or more missing backup set pieces.
E.
The backup set is from a previous version of RMAN and was not upgraded.
RMAN EXPIRED VS OBSOLETE
EXPIRED:
If you run CROSSCHECK, and if RMAN cannot locate the files, then it updates their
records in the RMAN repository to EXPIRED status. You can then use the DELETE
EXPIRED command to remove records of expired backups and copies from the RMAN
repository.
OBSOLETE:
Backups that are no longer needed to satisfy specified recoverability requirements. You can delete files obsolete according to the configured default retention policy, or another retention policy that you specify