Difference between archive logs and flashback zipped archivelogs?

Can someone explain to me the difference between the archive logs in the E:\oracle\product\11.1.0\db_1\RDBMS\ and the zipped archive logs in the E:\oracle\flash_recovery_area\sid\ARCHIVELOG\<date>?
They appear to be written at the same time and to be an exact copy of each other. Couldn't you use the flashback archivelog as a backup if the archivelog under the oracle_home was corrupted?
Thanks for taking this question!
Kathie

Obviously you have multiplexed archivelog destinations (check 'show parameter log_archive_dest' in sqlplus). By default one destination is defined as log_archive_dest_10='LOCATION=USE_DB_RECOVERY_FILE_DEST',that's the Flashback Recovery Area. 'Someone' defined a second destination.
It's the purpose of multiple destinations to be protected against failures of one destination.
Werner

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