performing inline upgrading Windows Server 2008R2 Std into 2012 R2 Standard caveats ?


I've got a HP DL 380 G7 backup server that is running on Windows Server 2008 R2 Standard SP1 with the access to NTFS LUNs presented by HP EVA 6400 storage array as 18 drive letters using Direct Attached SCSI cable to the HBA.

I wonder what would be the best way to perform upgrade to Windows Server 2012 R2 Standard safely with no data loss ?

The C: drive currently has 9 GB free.

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Senior IT System EngineerIT ProfessionalAsked:
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Tony GiangrecoCommented:
It looks like it will work, except you will probably need more disk space before starting:

Here is a Microsoft page detailing that process:
Tony GiangrecoCommented:
And take a full server backup before starting.
Senior IT System EngineerIT ProfessionalAuthor Commented:

For the Full backup of the server do you mean can I just take the System state backup ?

because the other drives apart from C: drive is backup repository which is way too big to be backed up again (~36 TB).

What about the SCSI cable during the upgrade ? shall I leave it attached or remove it ?
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Tony GiangrecoCommented:
In that case, I would backup the C drive and system state. I would not disconnect any cables.

It sounds like you are not running a raid. In that case, I'd recommend cloning that C drive with a larger drive and then expanding the C partition on the new drive to provide more free space before the upgrade.

You don't want to run out of disk space during the upgrade.
Tony GiangrecoCommented:
I just checked. 2012 r2 requires 32 Gigs of disk space.

Disk space requirements

The following are the estimated minimum disk space requirements for the system partition.

    Minimum: 32 GB

Be aware that 32 GB should be considered an absolute minimum value for successful installation. This minimum should allow you to install Windows Server 2012 R2 in Server Core mode, with the Web Services (IIS) server role. A server in Server Core mode is about 4 GB smaller than the same server in Server with a GUI mode. For the smallest possible installation footprint, start with a Server Core installation and then completely remove any server roles or features you do not need by using Features on Demand. For more information about Server Core and Minimal Server Interface modes, see Windows Server Installation Options.
The system partition will need extra space for any of the following circumstances:

If you install the system over a network.
- Computers with more than 16 GB of RAM will require more disk space for paging, hibernation, and dump files.

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Senior IT System EngineerIT ProfessionalAuthor Commented:
Yes, this HP DL 380 G7 server is equipped with 64 GB of RAM that it is now only used 32 GB due to Windows Server 2008 R2 Standard limitation.
Tony GiangrecoCommented:
The requirement I'm referring to is Disk space, not ram.  

If you only have 9 Gigs free on the C drive, you need to run this process:

1. Get some Server grade Cloning software like Paragon Disk Manager (server version)
2. Clone that c drive onto a larger drive
3. Replace the C drive with the new drive
4. after you have at least 50 gigs of free space on the C drive (Preferably 250 - 300 gigs), then run the in-place upgrade process.
Tony GiangrecoCommented:
Here is a link to the Paragon software
Senior IT System EngineerIT ProfessionalAuthor Commented:
ok, so what happened to the old Windows directory after the inline upgrade ?
Tony GiangrecoCommented:
You went from Windows 2008 to 2012 which has the Windows 8 style interface.

Have we answered your question?
Senior IT System EngineerIT ProfessionalAuthor Commented:
Thanks !
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Windows Server 2012

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