z/OS MVS System Initialization Logic - Messmer The Brain House
z/OS MVS System Initialization Logic - Messmer The Brain House
z/OS MVS System Initialization Logic - Messmer The Brain House
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UCW and UCB Generation<br />
Activate using a<br />
Reset Profile (POR)<br />
SE<br />
Selected IOCDS<br />
UCW Images<br />
(subchannels)<br />
IOCP Program<br />
Writes IOCDS<br />
Zürich | 26. Oktober 2004<br />
Central Storage<br />
HSA<br />
UCWs (1 per Device)<br />
Main Storage<br />
UCBs (1 per Device)<br />
Dynamic<br />
Changes<br />
HCD DYNAMIC<br />
Allows adding, deleting<br />
or modifying the<br />
Hardware Definitions<br />
(CHPIDs, CU, Devices)<br />
UCBs and EDTs<br />
(requires a Production<br />
IODF to activate)<br />
Introduction<br />
UCBs built during IPL/NIP<br />
IODF pointed to by the LOADPARMs<br />
and LOADxx<br />
HCD<br />
Production IODF<br />
contains the LPAR Names,<br />
Channel Info<br />
Control Unit, I/O Device<br />
Info for both UCWs and<br />
UCB‘s, EDT and NIP consoles<br />
HCD<br />
Work IODF used to<br />
define Configuration<br />
and to make Changes<br />
© 2004 IBM Corporation 5
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