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The z10 EC contains an I/O subsystem infrastructure
which uses an I/O cage that provides 28 I/O slots and
the ability to have one to three I/O cages delivering a
total of 84 I/O slots. ESCON, FICON Express4, FICON
Express2, FICON Express, OSA-Express3, OSA-Express2,
and Crypto Express2 features plug into the z10 EC I/O
cage along with any ISC-3s and Infi niBand Multiplexer
(IFB-MP) cards. All I/O features and their support cards
can be hot-plugged in the I/O cage. Installation of an I/O
cage remains a disruptive MES, so the Plan Ahead fea-
ture remains an important consideration when ordering a
z10 EC system. Each model ships with one I/O cage as
standard in the A-Frame (the A-Frame also contains the
Central Electronic Complex [CEC] cage where the books
reside) and any additional I/O cages are installed in the
Z-Frame. Each IFB-MP has a bandwidth up to 6 GigaBytes
per second (GB/sec) for I/O domains and MBA fanout
cards provide 2.0 GB/sec for ICB-4s.
The z10 EC continues to support all of the features
announced with the System z9 EC such as:
• Logical Channel Subsystems (LCSSs) and support for
up to 60 logical partitions
• Increased number of Subchannels (63.75k)
• Multiple Subchannel Sets (MSS)
• Redundant I/O Interconnect
• Physical Channel IDs (PCHIDs)
• System Initiated CHPID Reconfi guration
• Logical Channel SubSystem (LCSS) Spanning
System I/O Confi guration Analyzer
Today the information needed to manage a system’s I/O
confi guration has to be obtained from many separate
applications. The System’s I/O Confi guration Analyzer
(SIOA) tool is a SE/HMC-based tool that will allow the
system hardware administrator access to the information
from these many sources in one place. This will make it
much easier to manage I/O confi gurations, particularly
across multiple CPCs. The SIOA is a “view-only” tool. It
does not offer any options other than viewing options.
First the SIOA tool analyzes the current active IOCDS on
the SE. It extracts information about the defi ned channel,
partitions, link addresses and control units. Next the SIOA
tool asks the channels for their node ID information. The
FICON channels support remote node ID information, so
that is also collected from them. The data is then formatted
and displayed on fi ve screens:
1)PCHID Control Unit Screen – Shows PCHIDs, CSS.
CHPIDs and their control units
2)PCHID Partition Screen – Shows PCHIDS, CSS. CHPIDs
and what partitions they are in
3)Control Unit Screen – Shows the control units, their
PCHIDs and their link addresses in each of the CSS’s
4)Link Load Screen – Shows the Link address and the
PCHIDs that use it
5)Node ID Screen – Shows the Node ID data under the
PCHIDs
The SIOA tool allows the user to sort on various columns
and export the data to a USB fl ash drive for later viewing.
z10 EC I/O Subsystem
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