B-tree
Disk 1:
20 A 21
22 E 30 H 31 L 32
40 R 41 T 42
Disk 2:
0 A 0
0 A 0 C 0 E 0
0 E 0
Disk 3:
0 E 0 G 0
0 I 0
0 L 0 M 0
Disk 4:
0 N 0 P 0 R 0
0 S 0
0 X 0 X 0
M
I
: #Keys in Internal node Large!!!
:Both NOT TOO
M
B
: #Keys in External node Small!!!
