RMAN backup archive logs on tape that has not been backuped yet...

Question

We are using RMAN with catalog on Legato. Oracle 10gR2.
Our archive log backup is taking every 2 hours with scriipt:
run {                                                            
allocate channel t1 type 'SBT_TAPE';
allocate channel t2 type 'SBT_TAPE';
send 'NSR_ENV=(NSR_SERVER=hitbackup.hit.hypohr,NSR_CLIENT=a22ff020.hit.hypobck)';
# 0.0840278 = 121 minutes!
backup archivelog FROM TIME = 'sysdate-0.0840278' filesperset 50 format '/arch1_%d_%u/';
release channel t1;
release channel t2;
}In the night we take everyday full backup where we delete all 9 days old archive log which has been backuped on tape at least once. The script is following:
run {
allocate channel t1 type 'SBT_TAPE';
allocate channel t2 type 'SBT_TAPE';
send 'NSR_ENV=(NSR_SERVER=hitbackup.hit.hypohr,NSR_CLIENT=a22ff020.hit.hypobck)';
backup full database filesperset 2 format '/full_%d_%U/';
release channel t1;
release channel t2;
allocate channel d2 type disk;
delete archivelog until time 'trunc(sysdate)-9'
backed up 1 times to device type SBT_TAPE;
release channel d2;
}Problem is that sometimes archive log backup is not performed (Legato head is busy with other backups or some restore that happened in the time when backup is scheduled and later 2hours frame is missing those logs) and then we backup them with some manual script.
We'd like to know how to backup to tape all archive logs in last 5 days that has not been backuped once to tape. I.E:
backup archivelog FROM TIME = 'sysdate-7' filesperset  50 format '/arch1_%d_%u/'
backed up 0 times to device type SBT_TAPE;This part will be included in daily job...which should recollect all missing archive logs from last seven days.
THX

Answer 1

You could try to use the NOT BACKED UP x TIMES clause from BACKUP command.