[Info-vax] recovery data

[Stephen Hoffman]

On 2015-05-16 15:55:01 +0000, Hans Vlems said:

> Yes, it sure confused me when I came across that message.
> The way I understand it is that the installation of a new product (not 
> a patch for the OS) destroys the possibility to rollback an OS patch.
> My guess is that a layered product might overwrite a component that was 
> part of a patch. If you opted to delete previous versions of kit 
> components, which I do, then there's no way that patch may be safely 
> uninstalled. Hence the message. At work (if I had work) I would keep 
> old files. For a hobbyist there's no problem.
> Hans

Related: <https://groups.google.com/d/msg/comp.os.vms/14bY8EQz7Ks/fngEMnxucpcJ>


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