IBM DS8000 User Manual page 45

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interconnects them. The network consists of elements like switches, bridges, and
repeaters that are used to interconnect the fibre-channel ports.
Fibre-channel overview for the DS8000 series
Each storage unit fibre-channel adapter has four ports, and each port has a unique
worldwide port name (WWPN). You can configure a port to operate with the
SCSI-FCP upper-layer protocol using the DS Storage Manager or the DS CLI. You
can add fibre-channel shortwave and longwave adapters to a DS8000 model.
For details on the host systems that support fibre-channel adapters, see the DS8000
Interoperability Matrix at http://www.ibm.com/servers/storage/disk/ds8000/ or
the System Storage Interoperation Center (SSIC) at http://www.ibm.com/systems/
support/storage/config/ssic/.
Fibre-channel adapters for SCSI-FCP support the following configurations:
v A maximum of 64 host adapter ports on DS8100 Models 921 and 931 and a
maximum of 128 host ports on DS8300 Models 922, 932, 9A2, and 9B2
v A maximum of 506 logins per fibre-channel port which includes host ports and
PPRC target and initiator ports
v Access to 63700 LUNs per target (one target per host adapter), depending on
host type
v Either arbitrated loop, switched-fabric, or point-to-point topologies
ESCON-attached System z and S/390 hosts overview
This section describes how you can attach the DS8000 storage unit to
ESCON-attached System z and S/390 hosts.
With ESCON adapters, the storage unit provides the following configurations:
v A maximum of 32 host ports for DS8100 Models 921 and 931 and a maximum of
64 host ports for DS8300 Models 922, 932, 9A2, and 9B2
v A maximum of 64 logical paths per port
v Access to 16 control-unit images (4096 CKD devices) over a single ESCON port
on the storage unit
v Zero to 64 ESCON channels; two per ESCON host adapter
v Two ESCON links with each link that supports up to 64 logical paths
A DS8100 storage unit supports up to 16 host adapters that provide a maximum
of 32 ESCON links per machine. A DS8300 storage unit supports up to 32 host
adapters that provide a maximum of 64 ESCON links per machine.
Note: ESCON host channels limit the number of devices per channel to 1024. To
fully access 4096 devices on a storage unit, it is necessary to connect a
minimum of four ESCON host channels to the storage unit. You can access
the devices through a switch to a single storage unit ESCON port. This
method exposes four control-unit images (1024 devices) to each host
channel.
The FICON bridge card in ESCON director 9032 Model 5 enables a FICON bridge
channel to connect to ESCON host adapters in the storage unit. The FICON bridge
architecture supports up to 16 384 devices per channel. This enables you to attach
other control units or other storage units to the same host channel up to the limit
that the host supports.
The storage unit supports the following operating systems for System z and S/390
hosts:
Chapter 1. Introduction to IBM System Storage DS8000 series
17