Windows Server R2 x64 Server system upgrade-Troubleshooting server physical memory does not fully use the issue.

Windows Server R2 Physical memory limit

Version	Limit
Windows Server R2 Datacenter	2TB
Windows Server R2 Enterprise	2TB
Windows Server R2 for itanium-based Systems
Windows Server R2 Foundation	8GB
Windows Server R2 Standard	32GB
Windows HPC Server R2	128GB
Windows WDB Server R2	32GB

128GB physical memory actually only 32GB can be used, the solution is as follows:

One, from different versions of the system physical memory support limits can be seen, by upgrading the system version can solve the problem.

Windows Server version R2 standard upgrade to Enterprise Edition, a command can be done, do not need to reload the system. But the upgrade needs to follow certain principles: The upgrade is irreversible, only from low to high.

Path to support upgrade:

Windows Server R2 standard-> Windows Server R2 enterprise-> Windows Server R2 Datacenter;

Windows Server R2 Standard Server Core, Windows Server R2 Enterprise Server core->windows server R2 Datacenter Server Core;

Windows Server R2 foundation-> Windows Server R2 standard;

Second, upgrade the use of the command is DIMS.exe, must be online to upgrade. Detailed Command reference: http://techent.microsoft.com/en-us/library/dd744380 (ws.10). aspx

The upgrade command is as follows:(input at cmd- command Prompt)

1. View the current system version:

#DIMS/online/get-currentedition

2. View the version that the current system can upgrade to <edition id>

# dism/online/get-targeteditions

3. Upgrading the System version

#DISM/online/set-edition:<edition id>/poductkey:xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

Where <edition id> is the upgradeable version to be found in the second step, for example: Serverenterprise, the last side is the serial number of the system version to be upgraded to.

Recommended: Windows R2 Enterprise Edition key:489j6-vhdmp-x63pk-3k798-cpx3y

Finally, press "Y" to restart the system into effect configuration, the original system after the upgrade of the remote management, local users and passwords will not have an impact. You can use remote direct operation.

Windows Server R2 x64 Server system upgrade-Troubleshooting server physical memory does not fully use the issue.