Mainframe Hardware Definition; Hardware Definition Using Iocp (Mvs, Vm, Or Vse) - HP XP20000/XP24000 Operation Manual

Mainframe hardware definition

Hardware definition using IOCP (MVS, VM, or VSE)

The I/O Configuration Program (IOCP) can be used to define the storage system in MVS, VM, and
VSE environments (wherever HCD cannot be used). The storage system supports up to 255 control
unit (CU) images and up to 65,280 LDEVs. Each CU image can hold up to 256 LDEV addresses. A
CU image is the same as an IBM logical sub-system (LSS). The CUADD parameter defines a CU image
by its control unit address, which can be 0 to F for ESCON connectivity, or 00 to FE for FICON/zHPF
connectivity. ESCON connectivity can be used with CU types 3990, 2105, and 2107. FICON/zHPF
connectivity can be used with CU types 2105 (2105-F20 or later) and 2107.
CAUTION:
The following are cautions when using IOCP or HCD:
When multiple LPARs/mainframes can access the volumes, use FEATURE=SHARE for the devices.
Up to 16,384 addresses per physical interface are allowed by MVS with FICON/zHPF channels.
Multiple groups of FICON/zHPF channels may be used to access the maximum of 65,280 devices
that can be configured using 255 control unit images (CUADD=00 through CUADD=FE in the
CNTLUNIT statement).
Up to 1,024 addresses per physical interface are allowed by MVS with ExSA (ESCON) channels.
(This includes PAV base and alias addresses.) ESCON interfaces support up to 4,096 devices for
each set of 16 CU images using CUADD=0 through CUADD=F in the CNTLUNIT statement. ESCON
channel interfaces can be assigned to access individual groups of 16 CU images.
The following example shows a sample IOCP definition for a storage system configured with:
2105 ID
Four FICON/zHPF channel paths. Two channels paths are connected to a FICON switch. Two
channel paths are directly connected to the storage system.
Six control unit images (00–05) with 256 LVIs per control unit
64 base addresses and 128 alias addresses per CU 00, 01, 02, and 03
128 base addresses and 128 alias addresses per CU 04 and 05
******************************************************
**** Sample FICON CHPID / CNTLUNIT and IODEVICE ******
******************************************************
30 Mainframe operations
CHPID PATH=(F9),TYPE=FC,SWITCH=07
CHPID PATH=(FB),TYPE=FC
CHPID PATH=(FD),TYPE=FC
CHPID PATH=(FF),TYPE=FC,SWITCH=07
CNTLUNIT CUNUMBR=8100,PATH=(F9,FB,FD,FF),
LINK=(04,**,**,05),
UNIT=2105,CUADD=00,UNITADD=((00,256))
CNTLUNIT CUNUMBR=8200,PATH=(F9,FB,FD,FF),
LINK=(04,**,**,05),
UNIT=2105,CUADD=01,UNITADD=((00,256))
CNTLUNIT CUNUMBR=8300,PATH=(F9,FB,FD,FF),
LINK=(04,**,**,05),
UNIT=2105,CUADD=02,UNITADD=((00,256))
CNTLUNIT CUNUMBR=8400,PATH=(F9,FB,FD,FF),
LINK=(04,**,**,05),
UNIT=2105,CUADD=03,UNITADD=((00,256))
CNTLUNIT CUNUMBR=8500,PATH=(F9,FB,FD,FF),
LINK=(04,**,**,05),
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