Can I upgrade from Server 2008 Enterprise x64 to Server 2008 Enterprise x64 R2?

I have the Server 2008 Enterprise x64 R2 disc, however not sure if its an upgrade disc. My question is, can I just pop that disc in and do an upgrade? My current OS is Server 2008 Enterprise x64. My server is currently an AD, DHCP, DNS, File server, and I do not want to lose any data.

Also, the Server 2008 Enterprise x64 R2 disc I have has its own product key, so Im thinking this is not an upgrade disc. So how does it work if this disc has a product key, and if I already have Server 2008 Enterprise x64 OS currently installed with its own product key?  
kalian31Asked:
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BillSystems AdministratorCommented:
These might be good options (you'll need to add hard disks of your choice):

http://cgi.ebay.com/IBM-7979-21U-System-x3650-1-x-Dual-Core-Xeon-1-6-GHz-4-/170613127286?pt=Desktop_PCs&hash=item27b955b876
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US $229.90

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http://cgi.ebay.com/7979-71U-IBM-X3650-3-0GHZ-5160-DC-1GB-RAM-797971U-/160448072038?pt=COMP_EN_Servers&hash=item255b734966
7979-71U IBM X3650 3.0GHZ 5160 DC, 1GB RAM 797971U
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IBM X3650 - Intel Xeon Processor 5160 3.0 GHz/1333 MHz FSB 2 x 2MB L2 Cache, 2x 512 MB PC2-5300 DDR2 AMF ECC DRAM, 0GB SAS SCSI hot-swap HD (open bay), CD-RW/DVD-ROM combo drive, 2x Broadcom Gigabit Ethernet, ATI RN50 video (16 MB), 1x 835 W power supply

100% positive feedback seller
http://cgi.ebay.com/IBM-7979-21U-x3650-Dual-Core-1-60GHz-1GB-8K-Raid-/170621500499?pt=COMP_EN_Servers&hash=item27b9d57c53
IBM 7979-21U x3650 Dual Core 1.60GHz 1GB 8K Raid
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30 day exchange, buyer pays return shipping
IBM 7979-21U x3650 Dual Core 1.60GHz 1GB 8K Raid

Condition: Used, Tested Working

Features:
Processor: Dual Core 5110 Xeon 1.60GHz 4MB Cache 1066Mhz Bus
Memory: 1GB PC2-5300 DDR2 ECC
Hard Drive: 0 HDD
Raid: ServeRaid 8K
Optical: CD-RW/DVD-ROM
Power Supply: Qty 1
Form Factor: 2U
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PowerEdgeTechIT ConsultantCommented:
Upgrade is supported:
http://technet.microsoft.com/en-us/library/dd979563(WS.10).aspx

You can upgrade from your disk, and when you do, you'll be prompted for the new product key which will then be used to activate R2.  
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RaneeshIT SupportCommented:
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Svet PaperovIT ManagerCommented:
Yes, it is possible. Just make sure you take a full backup of the server before starting the upgrade. The upgrade need to be run from within Windows.

But why do you want to upgrade it? There is no much gain unless you are planning to use Hyper-V.
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kalian31Author Commented:
Hi spaperov,

The reason why I want to upgrade is to use Hyper-V, in answer to your question. I will evaluate which answers in this thread is best, and will give points.
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kalian31Author Commented:
BTW,

Can you add Hyper-V role when using a virtual server and make that vserver a host to deploy virtual machines? Or, can you only use a physical server that has VT enabled in the BIOS? I have a HP DL360 G4. Would this server qualify for Hyper-V role?
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PowerEdgeTechIT ConsultantCommented:
Hyper-V must run directly on a physical machine with VT enabled.

Can't tell you for sure on the DL360 G4's ability to run VT, but based on the age, I would say it is not VT capable.  Do you know which model processor you have in it?
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kalian31Author Commented:
Hi PowerEdgeTech,

The DL360 G4 server I have has an Intel Xeon processor.
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PowerEdgeTechIT ConsultantCommented:
Right, but do you know which model number?  Some Xeon processors from that era were VT-capable and some were not.
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kalian31Author Commented:
I would probably need to run cpu-z utility to find out more info on the processor. I will update you later in the day.
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kalian31Author Commented:
Hi PowerEdgeTech,

Here is a screenshot of my processor. I hope you can tell if VT technology is embedded to this processor.

 processor
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PowerEdgeTechIT ConsultantCommented:
Looks as though VT is a no-go on this system:
http://ark.intel.com/Product.aspx?id=27085
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kalian31Author Commented:
Can someone please list any HP server that has Intel® Virtualization Technology (VT-x) embedded in the processor for vSphere of Hyper-V access, that cost less than $300 (used or brand new)?
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Svet PaperovIT ManagerCommented:
You can buy any new PC with 64-bit processor and you will good to go. They all support hardware virtualization.
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kalian31Author Commented:
I am almost ready to select which answer is best in this thread. However, if anyone can tell me for $400 or less, please list any HP Proliant server that has this capability. I need the server to be the host server to deploy all these virtual machines.
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PowerEdgeTechIT ConsultantCommented:
All new HP servers start at $450, but here is a used one for less than $400 that has a processor capable of VT:
http://cgi.ebay.com/HP-ML110-G4-Tower-DC-1-86Ghz-72GB-SAS-Server-432126-001-/140529382548?pt=COMP_EN_Servers&hash=item20b8343494
http://ark.intel.com/Product.aspx?id=27203
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BillSystems AdministratorCommented:
Windows 2008 R2 requires a brand new OS license.  It's not something that you can download for free.
That being said according to Microsoft it appears that there is an upgrade path available.  The upgrade matrix in the link is fairly straightforward.

http://technet.microsoft.com/en-us/library/dd979563(WS.10).aspx
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kalian31Author Commented:
I am looking for a rackmount server that has the embedded VT processor technology for less than $400, wheter it be new or used.
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BillSystems AdministratorCommented:
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