IBM 990 - Manual (Page 129)

Chapter 4. Channel Subsystem 117
Figure 4-5 z990 I/O configuration definition flow
4.3 LCSS-related numbers
Table 4-3 lists LCSS-related information in terms of maximum values for devices,
subchannels, logical partitions, and CHPIDs.
Table 4-3 z990 LCSS at a glance
HCD
1. Create IODF for z990
without PCHIDs
2. Create Validated Work IODF -
HCD option 2.12 =
Build validated work I/O definition file
3. Create IOCP deck -
HCD option 2.3 =
Build IOCP input data set
5. Import IOCP deck with PCHIDs
into IODF - HCD option 5.1 =
Migrate IOCP/OS data,
Migrate option 3 (PCHIDs)
6. Create a production IODF -
HCD option 2.1 =
Build production I/O definition file
CHPID Mapping Tool
4. Run CHPID mapping tool.
It will produce an IOCP
deck with PCHIDs assigned.
IODF
No PCHIDs
IODF
With
PCHIDs
IOCP Deck
No PCHIDs
IOCP Deck
With
PCHIDs
Reports
H/W Config file
or CFreport
for your order
(CCN)
z990
Maximum number of LCSSs 4
Maximum number of CHPIDs 1024
Max. number of LPs supported per LCSS 15
Max. number of LPs supported per system 30
Maximum number of HSA subchannels 1890K (63K per partition * 30 partitions)
Maximum number of devices 252K (4 LCSSs * 63K devices)
Maximum number of CHPIDs per LCSS 256
Maximum number of CHPIDs per logical partition 256
Maximum number of devices/subchannels per
logical partition 63K