Checks the internal integrity of database data structures.
    The RMU Verify command does not verify the data itself. You
    can verify specific portions of a database or the integrity of
    routines stored in the database by using qualifiers.

    If you specify the RMU Verify command without any qualifiers, a
    database root file verification and full page verification of the
    area inventory page (AIP) and the area bit map (ABM) pages in the
    default RDB$SYSTEM storage area are performed. Also, the snapshot
    files and after-image journals are validated (even if journaling
    has been disabled).

    The RMU Verify command checks space area management (SPAM) pages
    for proper format. The contents of the individual entries are
    verified as the individual data pages are verified. The command
    does not attempt to determine if data within rows is reasonable
    or plausible.