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a. Server was withdrawn from marketing. 

b. The IBM Software Support Services for z/OS V1.13, which was offered as of October 1, 2016, provides the ability for customers to purchase extended defect support service for z/OS V1.13. 

c. Planned. All statements regarding IBM’s plans, directions, and intent are subject to change or withdrawal without notice. 

## 7.5.1 General guidelines 

d. The IBM Software Support Services for z/OS V2.1 provides the ability for customers to purchase extended defect support service for z/OS V2.1. 

The IBM z14 Model ZR1 introduces the latest IBM Z technology. Although support is provided by z/OS starting with z/OS V1R13, the capabilities and use of z14 ZR1 depends on the z/OS release. Also, web deliverables$^{15}$ are needed for some functions on some releases. In general, consider the following guidelines: 

GLYPH<SM590000> Do not change software releases and hardware at the same time. 

GLYPH<SM590000> Keep members of the sysplex at the same software level, except during brief migration periods. 

GLYPH<SM590000> Migrate to an STP-only network before introducing a z14 ZR1 into a sysplex. 

GLYPH<SM590000> More planning consideration is required for z14 ZR1 because it does not support InfiniBand coupling features. 

GLYPH<SM590000> Review any restrictions and migration considerations before creating an upgrade plan. 

GLYPH<SM590000> Acknowledge that some hardware features cannot be ordered or carried forward for an upgrade from an earlier server to z14 ZR1 and plan accordingly. 

GLYPH<SM590000> Determine the changes in IOCP, HCD, and HCM to support defining z14 ZR1 configuration and the new features and functions it introduces. 

GLYPH<SM590000> Ensure that none of the new z/Architecture Machine Instructions (mnemonics) that were introduced with z14 ZR1 are colliding with the names of Assembler macro instructions you use$^{16}$. 

## 7.5.2 Hardware Fix Categories (FIXCATs) 

GLYPH<SM590000> Check the use of MACHMIG  statements in LOADxx  PARMLIB commands. 

Base support includes fixes that are required to run z/OS on the IBM z14 Model ZR1 server. They are identified by: 

IBM.Device.Server.z14ZR1-3907.RequiredService 

