IBM pseries 690 Installation Manual page 158

The following illustration shows the location codes for the secondary rack. These codes are used to
identify the major functional units in the pSeries 690 systems.
142 Eserver pSeries 690 Installation Guide
U2.19
U2.17-P1-V5
U2.13
U2.9
U2.5
U2.1
FRONT
U2.19
U2.17-P2-V6
U2.13
U2.9
U2.5
U2.1
REAR