RMAN-06054：media recovery requesting unknown archived log for thread string with sequence string and starting SCN of string
错误码
错误描述：media recovery requesting unknown archived log for thread string with sequence string and starting SCN of string
错误原因：Media recovery is requesting a log whose existence is not recorded in the recovery catalog or target database control file.
解决方法：If a copy of the log is available, then add it to the recovery catalog and/or control file via a CATALOG command and then retry the RECOVER command. If not, then a point-in-time recovery up to the missing log is the only alternative and database can be opened using ALTER DATABASE OPEN RESETLOGS command.
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