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## 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: 

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) 

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: 

## 4.4 CPC drawer fanouts 

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 

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: 

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. 

