Can't create archived redo logs
Perhaps this from the Oracle Database Reference will be useful:


  
    Note: For Enterprise Edition users, this parameter has been deprecated
    in favor of the LOG_ARCHIVE_DEST_n parameters. If Oracle Enterprise
    Edition is not installed or it is installed, but you have not
    specified any LOG_ARCHIVE_DEST_n parameters, this parameter is valid.
  
  
  LOG_ARCHIVE_DEST is applicable only if you are running the database in
  ARCHIVELOG mode or are recovering a database from archived redo logs.
  LOG_ARCHIVE_DEST is incompatible with the LOG_ARCHIVE_DEST_n
  parameters, and must be defined as the null string ("") or (' ') when
  any LOG_ARCHIVE_DEST_n parameter has a value other than a null string.
  Use a text string to specify the default location and root of the disk
  file or tape device when archiving redo log files. (Archiving to tape
  is not supported on all operating systems.) The value cannot be a raw
  partition.
  
  If LOG_ARCHIVE_DEST is not explicitly defined and all the
  LOG_ARCHIVE_DEST_n parameters have null string values,
  LOG_ARCHIVE_DEST is set to an operating system-specific default value
  on instance startup.
  
  To override the destination that this parameter specifies, either
  specify a different destination for manual archiving or use the
  SQL*Plus statement ARCHIVE LOG START filespec for automatic archiving,
  where filespec is the new archive destination. To permanently change
  the destination, use the statement ALTER SYSTEM SET LOG_ARCHIVE_DEST =
  filespec, where filespec is the new archive destination.