if ( !isValid() ) {
            throw new SmbException("Descriptor is no longer valid");
        }
        return this.fid;
    }


    public byte[] getFileId () throws SmbException {
        if ( !isValid() ) {
            throw new SmbException("Descriptor is no longer valid");
        }
        return this.fileId;
    }


    /**
     * @return the initialSize