I have a couple Dell R805 server with 2xQuad Core AMD x64 processors and
64GB of RAM. I've steered away from Hyper-V because I was under the
impression it couldn't use more than 32GB of RAM. Is that correct? This page
suggests we can go > 32GB with Hyper-V on Server 2008 Enterprise:

http://www.microsoft.com/servers/hyp...r/default.mspx

We don't have any Guest OS's that need more than 8GB of RAM, but we'll
regularly need the host to be able to handle VMs with RAM totalling over
32GB.

I agree, it's confusing as here it's stated:
http://www.microsoft.com/servers/hyp...uirements.mspx

that 32Gb would be the maximum.

I'm pretty sure that relates to the host OS type being 'Standard' (64
bits though), which as you know only supports 32Gb. The Enterprise and
Datacenter 64 bits editions support up to 2 Terrabyte.

/ ) Regards,
/ /_________
_|__|__) Paul Weterings
/ (O_) http://www.servercare.nl
__/ (O_)
____(O_)


David Boyer wrote:
> I have a couple Dell R805 server with 2xQuad Core AMD x64 processors and
> 64GB of RAM. I've steered away from Hyper-V because I was under the
> impression it couldn't use more than 32GB of RAM. Is that correct? This page
> suggests we can go > 32GB with Hyper-V on Server 2008 Enterprise:
>
> http://www.microsoft.com/servers/hyp...r/default.mspx
>
> We don't have any Guest OS's that need more than 8GB of RAM, but we'll
> regularly need the host to be able to handle VMs with RAM totalling over
> 32GB.
>
>

You can use >32 GB of RAM on Enterprise. Just not on the "Hyper-V Server"
standalone. THAT is based on Server 2008 Standard, and thus limited to 32
GB. When you install the Hyper-V Role on Server 2008 Enterprise, you get
access to the larger memory space of Enterprise.

--
Charlie.
http://msmvps.com/blogs/xperts64
http://mvp.support.microsoft.com/profile/charlie.russel

"David Boyer" <noreply@bvu.edu> wrote in message
news:uJc7HR8JJHA.5920@TK2MSFTNGP03.phx.gbl...
>I have a couple Dell R805 server with 2xQuad Core AMD x64 processors and
>64GB of RAM. I've steered away from Hyper-V because I was under the
>impression it couldn't use more than 32GB of RAM. Is that correct? This
>page suggests we can go > 32GB with Hyper-V on Server 2008 Enterprise:
>
> http://www.microsoft.com/servers/hyp...r/default.mspx
>
> We don't have any Guest OS's that need more than 8GB of RAM, but we'll
> regularly need the host to be able to handle VMs with RAM totalling over
> 32GB.
>

The link you point to is for the standalone Hyper-V Server. This is limited
to 32 GB, since it's based on Standard. That limit doesn't apply to
Enterprise or Datacenter.

--
Charlie.
http://msmvps.com/blogs/xperts64
http://mvp.support.microsoft.com/profile/charlie.russel

"Paul Weterings" <Paul-nospam-@syncpuls-dot-com> wrote in message
news:48ea35bf$0$3035$e4fe514c@dreader16.news.xs4al l.nl...
>I agree, it's confusing as here it's stated:
> http://www.microsoft.com/servers/hyp...uirements.mspx
>
> that 32Gb would be the maximum.
>
> I'm pretty sure that relates to the host OS type being 'Standard' (64 bits
> though), which as you know only supports 32Gb. The Enterprise and
> Datacenter 64 bits editions support up to 2 Terrabyte.
>
> / ) Regards,
> / /_________
> _|__|__) Paul Weterings
> / (O_) http://www.servercare.nl
> __/ (O_)
> ____(O_)
>
>
> David Boyer wrote:
>> I have a couple Dell R805 server with 2xQuad Core AMD x64 processors and
>> 64GB of RAM. I've steered away from Hyper-V because I was under the
>> impression it couldn't use more than 32GB of RAM. Is that correct? This
>> page suggests we can go > 32GB with Hyper-V on Server 2008 Enterprise:
>>
>> http://www.microsoft.com/servers/hyp...r/default.mspx
>>
>> We don't have any Guest OS's that need more than 8GB of RAM, but we'll
>> regularly need the host to be able to handle VMs with RAM totalling over
>> 32GB.

> suggests we can go > 32GB with Hyper-V on Server 2008 Enterprise


see the Windows Server 2008 specs:
<URL:http://www.microsoft.com/windowsserver2008/en/us/compare-specs.aspx>

Standard (note 4):
"With the Hyper-V Role installed up to 32 GB of RAM
is supported by the operating system..."

Enterprise (note 5):
"With the Hyper-V Role installed up to 1TB of RAM is supported by the
operating system.
Each virtual machine can address up to 64 GB..."




--
Thomas Scheidegger - 'NETMaster'
http://dnetmaster.net/