Icp (Integrated Channel Processor) - Fujitsu Siemens Computers pmn User Manual

Hardware architecture
2.2.1.2

ICP (Integrated Channel Processor)

The ICP is the interface to the host systems connected in the overall system.
Hosts
BS2000/OSD,
z/OS and OS/390
z/OS and OS/390
BS2000/OSD,
Open Systems
Figure 5: External and internal ICP connections
Depending on the type of host system used, it is possible to equip an ICP with a maximum
of 4 ESCON boards on the host side (connection with BS2000/OSD, z/OS or OS/390), with
one or two FICON ports (connection with z/OS or OS/390), or with one or two FC boards
(BS2000/OSD or open systems). A mixed configuration is also possible.The ICP also has
an internal FC board (or two in the case of redundancy) for connecting to the RAID disk
system.
The main task of the ICP is to emulate physical drives to the connected host systems.
The host application issues a logical mount job for a logical drive in an ICP connected to a
host system (see
ferred for the associated logical volume is then stored by the ICP directly in the RAID disk
system.
i
Communication with the other processors takes place over a LAN connection.
28
section "Issuing a mount job from the host" on page
The virtual CentricStor drives support a maximum block size of 256 KB.
LAN
ESCON
ICP
ICP
FICON
ICP
FCP
CentricStor - Virtual Tape Library
CentricStor
FC
FC
FC
FC
FC
FC
39). The data trans-
U41117-J-Z125-7-76