Example of Data Access buffer Buffer Block A input(A) A Buffer Block B Y B output(B) read(X) write(Y)） x□ 2□ y work area work area of T1 of T2 memory disk Database System Concepts,5th Edition,Oct 5,2006 17.10 ©Silberschat乜，Korth and SudarshanDatabase System Concepts, 5 17.10 ©Silberschatz, Korth and Sudarshan th Edition, Oct 5, 2006 Example of Data Access X Y A B x1 y1 buffer Buffer Block A Buffer Block B input(A) output(B) read(X) write(Y) disk work area of T1 work area of T2 memory x2