The rack with the spine mounted is shown in Figure 2-5. If necessary, the spine easily can be  relocated for service procedures. The z15 Model T01 (machine type 8561) server continues the design of z14 by packaging  processors in drawers. A z15 CPC drawer includes the following features: The z15 can include 1 - 5 CPC drawers (three in the A frame and two in the B frame). A CPC  drawer and its components are shown in Figure 2-6 on page 42. GLYPH<SM590000> Five single chip modules (SCMs) GLYPH<SM590000> Up to 20 Memory DIMMs GLYPH<SM590000> Symmetric multiprocessor (SMP) connectivity GLYPH<SM590000> Connectors to support PCIe+ Gen3 fanout cards for PCIe+ I/O drawers or coupling  fanouts for coupling links to other CPCs Figure 2-5 I/O cable management spine (Frame Z, rear view) 2.2 CPC drawer Chapter 2. Central processor complex hardware components  41