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IBM i 7.1 Technical Overview with Technology Refresh Updates by Tom Vernaillen, Xiao Hu Qu, Sandra Nelson, Yohichi Nakamura, Axel Lachmann, Tom Grigoleit, Clive Griffiths, Octavio Bustos, Hernando Bedoya

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Upgrading IBM i
Consistent with OS/400 and i5/OS in the past, IBM i 7.1 supports n-2 for previous release compatibility. More importantly, this support is also what allows IBM i 5.4 and IBM i 6.1 to have an upgrade path to IBM i 7.1. However, when you upgrade from IBM i 5.4 to IBM i 7.1, there are special considerations that pertain to object conversions, which are much the same as when you upgrade to IBM i 6.1 from a previous release. This chapter highlights several of these planning details, although you should review the i5/OS V6R1 Memo to Users ...

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