V$UNUSABLE_BACKUPFILE_DETAILS

V$UNUSABLE_BACKUPFILE_DETAILS contains information about all backup files (backup pieces, proxy copies, or copies) that are marked unavailable and expired. You can select one of the rows and use BTYPE_KEY or FILETYPE_KEY to change the status of a backup file set or a specific file to available.

Column	Datatype	Description
`SESSION_KEY`	`NUMBER`	Session identifier
`SESSION_RECID`	`NUMBER`	Session recid
`SESSION_STAMP`	`NUMBER`	Session stamp
`RMAN_STATUS_RECID`	`NUMBER`	The record ID of the corresponding row in the control file
`RMAN_STATUS_STAMP`	`NUMBER`	The timestamp of the row in the controlfile
`BTYPE`	`CHAR(9)`	Backup type container. Possible values are: `BACKUPSET`, `IMAGECOPY`, `PROXYCOPY`.
`BTYPE_KEY`	`NUMBER`	Unique identifier for the backup type, either `BS_KEY` or `COPY_KEY`.
`ID1`	`NUMBER`	If `BACKUPSET`, it contains `SET_STAMP`. If `IMAGECOPY` or `PROXYCOPY`, it is `RECID` from the control file.
`ID2`	`NUMBER`	If `BACKUPSET`, it contains `SET_COUNT`. If `IMAGECOPY` or `PROXYCOPY`, it is `STAMP`.
`FILETYPE`	`VARCHAR2(15)`	Type of file. Possible values are: `BACKUPPIECE`, `COPY`, `PROXYCOPY`.
`FILETYPE_KEY`	`NUMBER`	Backup piece key if the file is a backup piece; otherwise `COPY_KEY`.
`STATUS`	`VARCHAR2(1)`	Status of the backup file, either `U` (unavailable) or `X` (expired)
`FILESIZE`	`NUMBER`	Size of the file
`DEVICE_TYPE`	`VARCHAR2(17)`	Type of device on which the file resides
`FILENAME`	`VARCHAR2(513)`	Name of the file
`MEDIA`	`VARCHAR2(65)`	Name of the media on which the copy resides. This value is informational only. It is not needed for restore.
`MEDIA_POOL`	`NUMBER`	Media pool in which the copy resides. This is the same value that was entered in the `POOL` operand of the Recovery Manager `BACKUP` command.