Hitachi Compute Blade 2500 Getting Started Manual page 46

Each half-wide blade has an ID tag for identifying the unit. The ID tag shows
the model name, serial number, and relevant version information.
1 HDD slots 0 and 1
.
These are slots for installing HDDs on the server blade.
2-10
Figure 2-13 Half-wide blade
Figure 2-14 ID tags of half-wide blades
Figure 2-15 Switch and connector of a half-wide
CB 2500 Appearance
Hitachi Compute Blade 2500 Series Getting Started Guide