Yum snapshot

[Nicoli Stupinski]

If I install the OS (Rhel 5.5) and do a "yum update" on May 1st on a test
server, how can I get the same update (same set of patches, etc that were
available on May 1st) done 6 months later on a second server?

I want both servers to be running the same versions and patch levels that
which our apps were tested.   So I need to save a copy of the rpms that were
installed on May 1st with the first server and only install that set of
rpms on the second server, 6 months later.   How would I go about doing
that?

Here's the curveball, the test server is a virtual host and the second
server is not virtual.  So are there hardware dependent updates that I
should be concered about?

Thanks,
Nic