If the application data is not on the same disks as the operating system then you don't have to move the application data when you upgrade the OS. If it is on the same disks then the data must be moved. This is true for VM, z/OS, VSE, or Linux.
Wayne Driscoll wrote:
The requirement that a version upgrade requires a full re-install and then copying of the data is one of the big issues I see with bringing Linux into a System z shop and having experienced z folks work on it. For z/OS or z/VM, you rarely (closer to never but...) have to move application data over in order to build a new OS. There are systems that have been migrated from MVS/SP on 24 bit hardware that are today running z/OS on 64 bit hardware, and the data hasn't needed to be moved. Just my $0.02 Wayne Driscoll Product Developer NOTE: All opinions are strictly my own.
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