ORA-19606: Cannot copy or restore to snapshot control file

因发现 flash area 不多了，通过 select * from v$flash_recovery_area_usage ； 发现是备份集占用空间太多。于是delete obsolet

因发现 flash area 不多了，通过 select * from v$flash_recovery_area_usage ； 发现是备份集占用空间太多。
于是delete obsolete; 发现出现报错 ORA-19606: Cannot copy or restore to snapshot control file

RMAN> delete obsolete;

RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=174 device type=DISK
Deleting the following obsolete backups and copies:
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Control File Copy 1 23-AUG-13 /u01/app/Oracle/product/11.2.0/dbhome_1/dbs/snapcf_finaprim.f
Backup Set 560 20-SEP-13
Backup Piece 560 20-SEP-13 +DATADG/finaprim/backupset/2013_09_20/annnf0_tag20130920t233259_0.1829.826673579
Backup Set 561 20-SEP-13
Backup Piece 561 20-SEP-13 +DATADG/finaprim/autobackup/2013_09_20/s_826673580.945.826673581
Backup Set 562 21-SEP-13
Backup Piece 562 21-SEP-13 +DATADG/finaprim/backupset/2013_09_21/annnf0_tag20130921t233004_0.623.826759805
Backup Set 563 21-SEP-13
Backup Piece 563 21-SEP-13 +DATADG/finaprim/backupset/2013_09_21/nnndf0_tag20130921t233011_0.693.826759813
Backup Set 564 21-SEP-13
Backup Piece 564 21-SEP-13 +DATADG/finaprim/backupset/2013_09_21/annnf0_tag20130921t233257_0.807.826759977
Backup Set 565 21-SEP-13
Backup Piece 565 21-SEP-13 +DATADG/finaprim/autobackup/2013_09_21/s_826759979.743.826759979
Backup Set 566 22-SEP-13
Backup Piece 566 22-SEP-13 +DATADG/finaprim/backupset/2013_09_22/annnf0_tag20130922t233005_0.1800.826846207
Backup Set 567 22-SEP-13
Backup Piece 567 22-SEP-13 +DATADG/finaprim/backupset/2013_09_22/nnndf0_tag20130922t233021_0.624.826846223
Backup Set 568 22-SEP-13
Backup Piece 568 22-SEP-13 +DATADG/finaprim/backupset/2013_09_22/annnf0_tag20130922t233307_0.1887.826846387
Backup Set 569 22-SEP-13
Backup Piece 569 22-SEP-13 +DATADG/finaprim/autobackup/2013_09_22/s_826846388.1891.826846389
Backup Set 570 23-SEP-13
Backup Piece 570 23-SEP-13 +DATADG/finaprim/backupset/2013_09_23/annnf0_tag20130923t233004_0.1041.826932605
Backup Set 571 23-SEP-13
Backup Piece 571 23-SEP-13 +DATADG/finaprim/backupset/2013_09_23/nnndf0_tag20130923t233020_0.776.826932621
Backup Set 572 23-SEP-13
Backup Piece 572 23-SEP-13 +DATADG/finaprim/backupset/2013_09_23/annnf0_tag20130923t233306_0.1895.826932787
Backup Set 573 23-SEP-13
Backup Piece 573 23-SEP-13 +DATADG/finaprim/autobackup/2013_09_23/s_826932787.1061.826932789
Backup Set 574 24-SEP-13
Backup Piece 574 24-SEP-13 +DATADG/finaprim/backupset/2013_09_24/annnf0_tag20130924t233005_0.1082.827019005