Some days ago I noticed a request as to how difficult the move from a z900 to a z9 with the now unsupported release of z/OS 1.4. It looked like you just had to apply the appropriate compatibility PTFs and PSP buckets. However, I either did not see or missed if this was done using the ORDERABLE comparability functions while z/OS 1.4 was still supported. The only way now is to download the z990 Exploitation Support for z/OS V1.4 from the web. This has the compatibility functions bundled in with other exploitation changes (which I don't really need). Has anyone used this method to get there operating system ready for a new machine, and if so how bad was the maintenance process. We don't have to run the z/OS 1.4 image for long on the new machine but we have a push pull machine change so have to feel comfortable about image coming up. It is also part of an existing SYSPlex contained on the one machine ( the others being z/OS 1.7 so only PSP bucket fixes for them), don't know if that complicates matters or not.
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