IBM z13s Technical Manual page 45

that of zEC12. This infrastructure is designed to reduce processor usage and latency, and
provide increased throughput.
z13s servers offer two I/O infrastructure elements for driving the I/O features: PCIe I/O
drawers for PCIe features, and up to one I/O drawer for non-PCIe features carried forward
only.
PCIe I/O drawer
PCIe I/O drawer
The , together with the PCIe features, offers finer granularity and capacity
over previous I/O infrastructures. It can be concurrently added and removed in the field,
easing planning. Only PCIe cards (features) are supported, in any combination. Up to two
PCIe I/O drawers can be installed on a z13s server with up to 32 PCIe I/O features per drawer
(64 in total).
I/O drawer
On z13s servers, a maximum of one I/O drawer is supported only when carried forward on
upgrades from zBC12 or z114 to z13s servers. For a z13s new order, the I/O drawer is not
available.
Native PCIe and Integrated Firmware Processor
Native PCIe was introduced with the zEDC and RoCE Express features, which are managed
differently from the traditional PCIe features. The device drivers for these adapters are
available in the operating system.
The diagnostic tests for the adapter layer functions of the native PCIe features are managed
by LIC that is designated as a resource group partition, which runs on the IFP. For availability,
two resource groups are present and share the IFP.
During the ordering process of the native PCIe features, features of the same type are evenly
spread across the two resource groups (RG1 and RG2) for availability and serviceability
reasons. Resource groups are automatically activated when these features are present in the
CPC.
I/O and special purpose features
z13s servers support the following PCIe features on a new build system, which can be
installed only in the PCIe I/O drawers:
FICON Express16S Short Wave (SX) and Long Wave (LX)
FICON Express8S Short Wave (SX) and Long Wave (LX)
OSA-Express5S 10 GbE Long Reach (LR) and Short Reach (SR)
OSA Express5S GbE LX and SX
OSA Express5S 1000BASE-T
10GbE RoCE Express
Crypto Express5S
Flash Express (FC 0403)
zEDC Express
When carried forward on an upgrade, z13s servers also support the following features in the
PCIe I/O drawers:
FICON Express8S SX and LX
OSA-Express5S (all)
OSA-Express4S (all)
10GbE RoCE Express
Flash Express (FC 0402)
zEDC Express
Chapter 1. Introducing IBM z13s servers
17