gfs_fsck cannot repair rindex problems when directly on blockdevice
    
    The calculations for resource group (RG) locations was close but not
    identical to what gfs_mkfs used.  Therefore, in some peculiar
    boundary cases, gfs_fsck was unable to repair damaged RGs or a
    damage rindex file.  The calculations have been adjusted to match
    those used by gfs_mkfs so the file system is repaired correctly.
    
    rhbz#512722