[ovirt-users] Upgrade from 3.6 to 4.1

[Brett Holcomb]

I am currently running oVirt 3.6 on a physical server using hosted 
engine environment.  I have one server since it's a lab setup.  The 
storage is on a Synology 3615xs iSCSI LUN so that's where the vms are.  
I plan to upgrade to 4.1 and need to check to make sure I understand the 
procedure.  I've read the oVirt 4.1 Release Notes and they leave some 
questions.

First they say I can simply install the 4.1 release repo update all the 
ovirt-*-setup* and then run engine-setup.

1. I assume this is on the engine VM running on the host physical box.

2.  What does engine-setup do.  Does it know what I have and simply 
update or do I have to go through setup again.

3.  Then do I go to the host and update all the ovirt stuff?

However, they then say for oVirt Hosted Engine follow a link for 
upgrading which takes me to a Not Found :( page but did have a link back 
to the release notes which link to the Not Found which....  So what do I 
need to know about upgrading a hosted engine setup that there are no 
directions for.  Are there some gotchas?  I thought that the release 
notes said I just had to upgrade the engine and then the host.

Given that my VMs are on iSCSI what happens if things go bad and I have 
to start from scratch.  Can I import the VMs created under 3.6 into 4.1 
or do I have to do something else like copy them somewhere for backup.

Any other hints and tips are appreciated.

Thanks.