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GLYPH<SM590000> Depending on the configuration, two or four intelligent Power Distribution Units (PDUs) are mounted vertically on each side at the rear of the rack. All of the internal components receive their power from these intelligent PDUs. The PDUs are cabled for redundancy. 

GLYPH<SM590000> A newly designed vertical cable management guide (“spine”) can assist with proper cable management for fiber, copper, and coupling cables. The spine is shipped with configurations that contain three or four PCIe+ I/O drawers or with the 16U Reserved feature (FC 0617). All external cabling to the system (from top or bottom) can use the spine to minimize interference with the PDUs mounted on the sides of the rack. 

GLYPH<SM590000> The z14 ZR1 server (as its predecessor, the z13s) has the option of ordering the infrastructure to support the top and bottom exit of fiber optic and copper cables. 

The rack with the spine mounted is shown in Figure 2-2. It and includes removable hooks that can be placed in appropriate slots throughout the length of the spine. 

## 2.1.1 z14 ZR1 configurations 

<img src='content_image/976817.jpg'>

All system components are designed and integrated in an IBM 19-inch frame (rack)$^{2}$. The possible configurations of the system (rear view) are shown in Figure 2-3 on page 24. Consider the following points: 

GLYPH<SM590000> The z14 ZR1 system is built in a 42 EIA units rack (A-frame). The base rack is 40 EIA units high with a 2U removable top. FC 9975 is available if a height reduction is necessary. 

