Specifies the name of the database-specific default directory to
    which row cache backing file information is written. The database
    system generates a file name (row-cache-name.rdc) automatically
    for each row cache backing file it creates when the RCS process
    starts up. Specify a device name and directory name; do not
    include a file specification. The file name is the row-cache-name
    specified when creating the row cache. By default, the location
    is the directory of the database root file unless a database-
    specific default directory or a cache-specific default directory
    has been set.