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V5R4 to V7R4

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Yann Oche

Sep 1, 2022, 3:05:09 AM9/1/22

My company finally decided to migrate our AS400 server to latest version.
Has anyone experienced such 'gap' migration? I remember that objects needed to be converted from V5 to V6. Reading old doc suggest thats conversion are rather fast.

I think we should be able to convert objects on restore to new system, but would anyone be kind enough to point me a particular danger doing so?

Thx for your time,
Cheers, Yann.

John McCann

Sep 5, 2022, 4:52:25 PM9/5/22
Hi Yann

I am sure you can go 5.4 to 7.1, but not to 7.5, it would have to be a 2 step migration.

You will also need to look what hardware you will migrating to, 7.5 will only run on Power9 and Power10, and there is only 2 or 3 Power9 models that will run 7.1. There will also be changes to the OS and services, that might have an impact, e.g. if if you use SFTP the client and server have big changes to the ciphers, with IBM dropping any it regards as week. I found this going from 7.2 to 7.4, and that was only a little jump, expect some others.

You will also need to check any third party products and will they still run/be supported/upgradable, and any potential addition licencing costs.

If I was you I would get a TA in to look at at it, I know it is not cheap, but at the end of it, you may be very glad you did.

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