clean flash recovery area archive logs

I have an Oracle 11g on RHEL server. My /oradata volume reach 95% disk usage : [ora11g@bocc7-1-qrec-01 ~]$ df -h /dev/sdb1 689G 571G 84G 95% /oradata The Flash Recovery Area (FRA) is the larger folder : [ora11g@bocc7-1-qrec-01 ~]$ du -skh /oradata/* | sort -h 50G /oradata/qtest 175G /oradata/qrec 346G /oradata/flash_recovery_area Inside the FRA I can see that the archive logs take approx 230Gb: [ora11g@bocc7-1-qrec-01 ~]$ du -skh /oradata/flash_recovery_area/qrec/* 232G /oradata/flash_recovery_area/qrec/archivelog 7.9G /oradata/flash_recovery_area/qrec/onlinelog I checked the v$recovery_file_dest table and my SPACE_LIMIT is 20Gb and my SPACE_USED is only 10Mb! Connected to: Oracle Database 11g Release 11.2.0.3.0 - 64bit Production qrec> SELECT * FROM V$RECOVERY_FILE_DEST; NAME -------------------------------------------------------------------------------- SPACE_LIMIT SPACE_USED SPACE_RECLAIMABLE NUMBER_OF_FILES ----------- ---------- ----------------- --------------- /oradata/flash_recovery_area 2.1475E+10 10984448 0 1 _So, I deduced that it had nothing to do with this table._ Now I'm checking with RMAN : RMAN> crosscheck archivelog all; using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=259 device type=DISK validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1056_965658004.arc RECID=1057 STAMP=969146207 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1057_965658004.arc RECID=1058 STAMP=969149808 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1058_965658004.arc RECID=1059 STAMP=969153409 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1059_965658004.arc RECID=1060 STAMP=969157010 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1060_965658004.arc RECID=1061 STAMP=969160610 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1061_965658004.arc RECID=1062 STAMP=969164210 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1062_965658004.arc RECID=1063 STAMP=969167813 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1063_965658004.arc RECID=1064 STAMP=969171413 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1064_965658004.arc RECID=1065 STAMP=969175014 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1065_965658004.arc RECID=1066 STAMP=969178614 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1066_965658004.arc RECID=1067 STAMP=969182214 validation succeeded for archived log archived log file name=/oradata/flash_recovery_area/qrec/archivelog/log_1_1067_965658004.arc RECID=1068 STAMP=969185814 Crosschecked 12 objects RMAN> delete noprompt expired archivelog all; released channel: ORA_DISK_1 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=259 device type=DISK specification does not match any archived log in the repository So the **1st question** is: Why does RMAN not see my **2752** ARC files here : [ora11g@bocc7-1-qrec-01 ~]$ ls -1 /oradata/flash_recovery_area/qrec/archivelog | wc -l 2752 And the **2nd question** is: What should I do to free some disk space by removing old archivelog files? (the older ones are more than 1 year old!!) : [ora11g@bocc7-1-qrec-01 archivelog]$ find -type f -printf '%T+ %p\n' | sort | head -n 1 2017-02-22+16:54:41.0000000000 ./log_2_1_936636608.arc