Table 4-1 I/O domains of PCIe+ I/O drawer Domain I/O slot in domain 0 LG02, LG03, LG04, LG05, LG07, LG08, LG09, and LG10 1 LG12, LG13, LG14, LG15, LG17, LG18, LG19, and LG20 4.3.1 PCIe+ I/O drawer offerings A maximum of four PCIe+ I/O drawers can be installed for supporting up to 64 PCIe I/O  features.  For an upgrade to z14 ZR1 servers, only the following PCIe features can be carried forward: Consideration:  On a z14 ZR1 server, only PCIe+ I/O drawers are supported. No older  generation drawers can be carried forward. A new build IBM z14 ZR1 server supports the following PCIe I/O features that are hosted in  the PCIe+ I/O drawers: GLYPH<SM590000> FICON Express16S GLYPH<SM590000> FICON Express8S GLYPH<SM590000> OSA-Express5S (all 5S features)  GLYPH<SM590000> OSA-Express4S (all, except for 1000BASE-T) GLYPH<SM590000> 10GbE RoCE Express GLYPH<SM590000> Crypto Express5S GLYPH<SM590000> zEDC Express GLYPH<SM590000> Coupling Express Long Reach (CE LR) GLYPH<SM590000> FICON Express16S+ GLYPH<SM590000> OSA-Express7S 25GbE SR GLYPH<SM590000> OSA-Express6S GLYPH<SM590000> 25GbE RoCE Express2 GLYPH<SM590000> 10GbE RoCE Express2 GLYPH<SM590000> Crypto Express6S GLYPH<SM590000> zEDC Express GLYPH<SM590000> Coupling Express Long Reach (CE LR) GLYPH<SM590000> zHyperLink Express GLYPH<SM590000> The PCIe Generation 3 fanout cards: One port card (feature) that connects to a PCIe+ I/O  drawer supporting an eight-slot I/O domain. This card is always installed in pairs to  support I/O domain redundant connectivity. GLYPH<SM590000> ICA SR fanout cards: two ports per card (feature) that connect to other (external) CPC  drawers. 4.4 CPC drawer fanouts The z14 ZR1 server uses fanout cards to connect the I/O subsystem to the CPC drawer. The  fanout cards also provide the ICA SR coupling links for Parallel Sysplex. All fanout cards  support concurrent add, delete, and move.  The z14 ZR1 CPC drawer I/O infrastructure consists of the following features: Chapter 4. Central processor complex I/O system structure  125