Z22B PCIe Drawer 1 in Z frame Z15B PCIe Drawer 2 in Z frame Z08B PCIe Drawer 3 in Z frame 0428 16GB FICON Express16S+ SX 2 Ports RG1 Resource Group 1 0420 zEDC Express 0412 10GbE RoCE Express 0431 zHyperLink Express 0433 Coupling Express LR 0893 Crypto Express6S 0424 OSA Express6S 10 GbE LR 1 Ports 0425 OSA Express6S 10 GbE SR 1 Ports 0427 16GB FICON Express16S+ LX 2 Ports RG3 Resource Group 3 RG2 Resource Group 2 RG4 Resource Group 4 0171 HCA3 O PSIFB 12x 2 Links 0170 HCA3 O LR PSIFB 1x 4 Links 0172 ICA SR 2 Links 

The PCHID REPORT that is shown in Example 4-2 includes the following components: 

GLYPH<SM590000> Feature code 0170 (HCA3-O LR (1xIFB)) is installed in CPC drawer 1 (location A15A, slot LG14), and includes AID 0D assigned. 

GLYPH<SM590000> Feature code 0172 (Integrated Coupling Adapter (ICA SR) is installed in CPC drawer 4 (location A27A, slot LG05), and has AID 12 assigned. 

GLYPH<SM590000> Feature code 0424 (OSA-Express6S 10 GbE LR) is installed in PCIe I/O drawer 1 (location Z22B, slot 11), and has PCHID 120 assigned. 

GLYPH<SM590000> Feature code 0427 (FICON Express16S+ long wavelength (LX) 10 km (6.2 miles)) is installed in PCIe I/O drawer 2 (location Z22B, slot 26), and has PCHIDs 154 and 155 assigned. 

GLYPH<SM590000> Feature code 0431 (zHyperLink Express) is installed in PCIe I/O drawer 2 (location Z22B, slot 04), and includes PCHID10C assigned. PCHID 240 is shared by ports D1 and D2. 

A resource group (RG) parameter is shown in the PCHID REPORT for native PCIe features. A balanced plugging of native PCIe features exists between four resource groups (RG1, RG2, RG3, and RG4). 

For more information about resource groups, see Appendix C, “Native Peripheral Component Interconnect Express” on page 469. 

The preassigned PCHID number of each I/O port relates directly to its physical location (jack location in a specific slot). 

## 4.7 Connectivity 

I/O channels are part of the CSS. They provide connectivity for data exchange between servers, between servers and external control units (CUs) and devices, or between networks. 

For more information about connectivity to external I/O subsystems (for example, disks), see “Storage connectivity” on page 167. 

For more information about communication to LANs, see “Network connectivity” on page 173. 

