Dell PowerEdge M1000e Configuration Manual page 11

Figure 1-2. Blade Numbering - Full Height Blades
Figure 1-3. Blade Numbering - Mixed Full-Height and Half-Height Blades
1 2 3
1 2 3
4 5 6 7
4 5 6 7
13 14 15
Configuration Guide
8
8
16
9