Memory Upgrades; Preplanned Memory - IBM z13s Technical Manual

CPC drawer 1 has 40 GB of HSA memory and up to 2008 GB for customer memory.
Because the customer ordered 1496 GB, provided the granularity rules are met, 512 GB
are available for future nondisruptive upgrades by activating LIC.
Memory upgrades are satisfied from already installed unused memory capacity until it is
exhausted. When no more unused memory is available from the installed memory cards
(DIMMs), one of the following additions must occur:
Memory cards must be upgraded to a higher capacity.
A CPC drawer with more memory must be added.
Memory cards (DIMMs) must be added.
Memory upgrades are concurrent when it requires no change of the physical memory cards.
A memory card change is always disruptive.
When activated, an LPAR can use memory resources that are in any CPC drawer. No matter
where the memory is, an LPAR has access to that memory up to a maximum of 4 TB. This
access is possible because despite the CPC drawer structure, the z13s is still an SMP
system. The existence of an I/O drawer in the CPC limits the memory LPAR to 1 TB. For more
information, see 3.7, "Logical partitioning" on page 116.

2.4.4 Memory upgrades

Memory upgrades can be ordered and enabled using Licensed Internal Code Configuration
Control (LICCC) by upgrading the DIMM cards, by adding new DIMM cards, or by adding a
CPC drawer.
For a model upgrade that results in the addition of a CPC drawer, the minimum memory
increment is added to the system. Each CPC drawer has a minimum physical memory size of
160 GB.
During a model upgrade, adding a CPC drawer is a disruptive operation. Adding physical
memory to any drawer is also disruptive.

2.4.5 Preplanned memory

The idea of preplanned memory is to allow for nondisruptive memory upgrades. Any
hardware that is required would be pre-plugged based on a target capacity specified by the
customer. The maximum amount of Preplanned Memory capacity is 2 TB. Pre-plugged
hardware can be enabled by using an LICCC order placed by the customer when additional
memory capacity is needed.
You can order this LICCC through these channels:
The IBM Resource Link® (a login is required):
http://www.ibm.com/servers/resourcelink/
Your IBM representative
The installation and activation of any preplanned memory requires the purchase of the
required feature codes (FC), which are described in Table 2-9. FCs 1996 and 1993 are used
to track the quantity of 16 GB and 8 GB physical increments of plan ahead memory capacity.
The payment for plan-ahead memory is a two-phase process. One charge takes place when
the plan-ahead memory is ordered, and another charge takes place when the prepaid
Chapter 2. Central processor complex hardware components
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