IBM z13s Technical Manual page 46

Also, when carried forward on an upgrade, the z13s servers support one I/O drawer on which
the FICON Express8 SX and LX (10 km) feature can be installed.
In addition, InfiniBand coupling links HCA3-O and HCA3-O LR, which attach directly to the
CPC drawers, are supported.
Tip: FICON Express8 and 8S cards should only be ordered or carried forward to support
attachments to 2 Gbps devices and for older I/O optics not supported for 16 Gbps capable
features.
FICON channels
Up to 64 features of any combination of FICON Express16s or FICON Express8S are
supported in PCIe I/O Drawer. The FICON Express8S features support link data rates of 2, 4,
or 8 Gbps, and the FICON Express16S support 4, 8, or 16 Gbps.
Up to eight features with up to 32 FICON Express8 channels (carry forward) are supported in
one I/O drawer (also carry forward). The FICON Express8 features support link data rates of
2, 4, or 8 Gbps.
The z13s FICON features support the following protocols:
FICON (FC) and High Performance FICON for z Systems (zHPF). zHPF offers improved
performance for data access, which is of special importance to OLTP applications.
FICON channel-to-channel (CTC).
Fibre Channel Protocol (FCP).
FICON also offers the following capabilities:
Modified Indirect Data Address Word (MIDAW) facility that provides more capacity over
native FICON channels for programs that process data sets that use striping and
compression, such as DB2, VSAM, partitioned data set extended (PDSE), hierarchical file
system (HFS), and z/OS file system (zFS). It does so by reducing channel, director, and
control unit processor usage.
Enhanced problem determination, analysis, and manageability of the storage area
network (SAN) by providing registration information to the fabric name server for both
FICON and FCP.
Read Diagnostic Parameter
A new command called Read Diagnostic Parameter (RDP) allows z Systems to obtain extra
diagnostics from the Small Form Factor Pluggable (SFP) optics located throughout the SAN
fabric. RDP is designed to help improve the accuracy of identifying a failed/failing component
in the SAN fabric.
Open Systems Adapter
z13s servers allow any mix of the supported Open Systems Adapter (OSA) Ethernet features.
Up to 48 OSA-Express5S or OSA-Express4S features, with a maximum of 96 ports, are
supported. OSA-Express5S and OSA-Express4S features are plugged into the PCIe I/O
drawer.
The maximum number of combined OSA-Express5S and OSA-Express4S features cannot
exceed 48.
The N10 supports 64 OSA ports and the N20 supports 96 OSA ports.
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IBM z13s Technical Guide