IBM Z9, Planning Manual

Page: 146 / 274

Expanded Storage Dynamic Storage Reconfiguration Examples
To dynamically reconfigure expanded storage, the system programmer may plan
which LPs will donate storage and which LPs will receive storage. To do this, the
system programmer may specify origins that overlap the reserved (RSVD) storage
of the receiver with the initial (INIT) storage (and possibly some RSVD storage) of
the donor.
Figure 3-7 shows an example of expanded storage with dynamic storage
reconfiguration capability. This figure shows LP-A, LP-B, and LP-C.
To reconfigure expanded storage, deactivate LP-B to free up storage directly above
LP-A. Figure 3-8 on page 3-21 shows how you might reconfigure expanded storage
in this case.
0 GB
4 GB
6 GB
10 GB
1024 GB
LP-C (ES0)
LP-B (ES0)
LP-A (ES0)
LP-A
(ES1)
Unused Addressability
After
partition
activation
ORIG = 6 GB INIT = 4 GB RSVD = 0
ORIG = 4 GB INIT = 2 GB
ORIG = 0 INIT = 4 GB RSVD = 2 GB
Addressable
Storage
Figure 3-7. Expanded Storage Layout
3-20
PR/SM Planning Guide