How can I obtain the technicians handbook?
I'm not a phone system technician and I want to know:
1- This new installation is kind of backup and not affected old SSD Drive?
2- This new installation doesn't remove any old configuration or...? For example, when you want to install an OS on a PC, then you can remove or format all partitions and...
3- Any video that shows how to install?
Thus, this .ova file is in-person delivery?
Maybe I am not being exactly clear here... Most of the things you are talking about require access to Mitel Connect, their support site, which is not available to end users but only to authorized dealers and certified installers.
If you want the technician's handbook, ask your vendor or just Google it, it is out there. Note they are somewhat version specific... A THB for "Release 9" won't completely apply to one for MiVoice Business version 8. Mite has gone through some crazy versioning schemes over the years (Release 2-9, then MCD 4.0 and some oddball version specific changes, up to MiVoice Business 9.1 currently). That said, from MCD 5.0 through MiVB 8.0, things are largely the same, but from 9.0 and beyond it is a totally different animal as they did a complete software rewrite and it uses a different base OS, so you kind of need to have some idea what your looking for.
The "new installation" is just that, a new installation... If you do a backup from the first disk, swap the disk and do a new install, and then restore the database, it is 100% the same thing. You could just shutdown, remove the drive and install the backup drive, and turn the system back on and after it boots up will be in exactly the same state it was when you removed the backup drive initially, the only thing missing would be the changes made since you pulled that drive out. Essentially the only things NOT stored on the hard drive itself are network and IP settings, everything else is on the drive.
Comparing hard drive in a Mitel system isn't really a good correlation to a PC, it is not a "personal computer" but more like an appliance and something that is all encompassing that you don't mess with normally... Better to think of the hard drive in a Mitel as the engine in your new car. If it fails, you get a new one installed and the car is the same as it was before. You can mess with the "engine", but that makes things your responsibility now and, unlike the engine scenario, there isn't much help out there for things.
How your dealer would deliver the actual OVA file to you I can't answer, most do it electronically. Again, this is an OVA appliance, other than the settings, you don't mess with the OS or anything else EXCEPT the documented interfaces. Messing around "under the hood" is discouraged, but it's your baby... Just don't expect to get much assistance, not because we don't want to but because no one does it.
Your Mitel isn't a PC, and although some aspects are similar it does not follow the same rules as your Windows or Linux desktop PC, it is a very specialized device. I am not saying you can't hack away at it, but your likely not going to find a ton of support here for it. No one does this as the Mitel is a package, it is intended as an enterprise grade solution and any messing with it can and will break that and there is ZERO support except going back to stock.
Mitel runs on a dealer/vendor based system... Mitel does not deal with (most) end-users directly at all, it's products and information and closed and proprietary and not "open" in any way and even technical documentation is only available to dealers and certified installers.
My advice to you is to make monthly backups, or after major changes, and engage your vendor for some of these things. I am not trying to discourage you from experimenting and discovering things, but tread very carefully in a production environment... One mistake could cause hours or even days of downtime. I am just saying to be careful and remember this is not a toy.