Oracle USE_DB_RECOVERY_FILE_DEST Filesystem Path – Configuration Guide

You need to use the catalog command in RMAN to make the file known to the database (don't worry, this does not depend on a recovery catalog!)

The 11.2 manual says you should also check plain LOG_ARCHIVE_DEST. Although it comes from Standard Edition, it is still valid in case none of numbered Enterprise Edition destinations LOG_ARCHIVE_DEST_n are defined. I haven't tested that personally.

In case all are unset, the another 11.2 manual says

If you configure a Fast Recovery Area (by setting the DB_RECOVERY_FILE_DEST and DB_RECOVERY_FILE_DEST_SIZE parameters) and do not specify any local archive destinations, the database automatically selects the Fast Recovery Area as a local archive destination and sets LOG_ARCHIVE_DEST_1 to USE_DB_RECOVERY_FILE_DEST.

I vaguely remember I've seen somewhere that 11.1 database in such situation defaults to USE_DB_RECOVERY_FILE_DEST but via LOG_ARCHIVE_DEST_10.

In all, your configuration and syntax is correct.

alter system set log_archive_min_succeed_dest = 1;

Normally all destinations are optional. But your setting is ok; it could somewhat decrease potential data loss (loss of redo log not yet archived).

Further two items to take care of:

• a copy of redo logs on a second disk
• a copy of control file on a second disk