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Virtual Server 2005

Recent Virtual Server 2005 posts

* How to do a QUICK snapshot of the vhd file ?
* Few Server 2008 / Hyper-V questions.
* Guest OS CPU Maxing out
* Unable to start Virtual Sedrver
* First P2V with SCVMM - Hooray! But Failed NIC - Boo!
* How to crash dump a Guest running Windows 2008
* Virtual Server Service is getting disabled
* SCVMM hosts restriction
* Performance issue with Hyper-V and Intel P35 chipset
* Add Hyper-V Manager to Server 2008?
* Is there any compatibility issue between 2005 R2 and 2005 R2 SP1 f
* SCVMM Safe for P2V?
* Problem with Hyper-V, NCQ SATA drives; Event ID 129 from nvstor64 saying "Reset to device, \Device\RaidPort0, was issued".
* Fallback / Migrate guest from Hyper-V to virtual server/pc
* P2V for Windows 2000 server using SCVMM 2007
* can i install win2008 CORE in virtual server sp1 ?
* Virtual environment on cluster
* Hyper-V: adding multiple virtual machines to a cluster on the same disk
* Hyper-V problem adding a machine to a failover cluster
* DHCP/RCP Services hung at start on Win2000 Hyper-V Image

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VSS writer, DPM 2007 VM backups, vhdmount.exe

Source: microsoft.public.virtualserver
Sent: 07/24/2008
From: Brit
Message:

Today I started some tests with protecting VMs using DPM 2007 and need some
help understanding the errors I'm getting:

The VSS writer for Virtual Server failed during the PostBackup phase, during
the mounting of disk
\\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy8\VM\DAVUTIL1\DAVUTIL1.vhd for
virtual machine DAVUTIL1. The disk did not come online within 5 minutes.
Confirm that the vhd mount driver in installed correctly and is able to mount
virtual hard disks.

After doing some research on this topic and applying hotfixes that are
relevant to this issue, I think I'm running into an issue whereby the vhd is
mounted with the "undo" switch, which results in needing twice the space as
the original vhd to mount. If there is not enough physical disk space to
accomodate mounting the vhd, the VM backup will not continue.

If this is the case, there are of course two questions:

1. Where are VHDs mounted during this process?
2. Is the location VHDs are mounted configurable?

Thanks,
Brit

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Related Messages

Re: VSS writer, DPM 2007 VM backups, vhdmount.exe

Sent: 07/25/2008
From: "Alexander Ortha [MS]" <(email address - cut out)>
Message:

Hello,

What versions of Virtual Server and DPM do you use?

--
Mit freundlichen GrÃ¼ÃŸen / Kind regards - Alexander Ortha (Microsoft)

German Virtualization Blog
http://blogs.technet.com/germanvirtualizationblog/default.aspx

This posting is provided "AS IS" with no warranties, and confers no rights.

"Brit" <(email address - cut out)> schrieb im Newsbeitrag
news:(email address - cut out)...

Show quoted text

> Today I started some tests with protecting VMs using DPM 2007 and need
> some
> help understanding the errors I'm getting:
>
> The VSS writer for Virtual Server failed during the PostBackup phase,
> during
> the mounting of disk
> \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy8\VM\DAVUTIL1\DAVUTIL1.vhd
> for
> virtual machine DAVUTIL1. The disk did not come online within 5 minutes.
> Confirm that the vhd mount driver in installed correctly and is able to
> mount
> virtual hard disks.
>
> After doing some research on this topic and applying hotfixes that are
> relevant to this issue, I think I'm running into an issue whereby the vhd
> is
> mounted with the "undo" switch, which results in needing twice the space
> as
> the original vhd to mount. If there is not enough physical disk space to
> accomodate mounting the vhd, the VM backup will not continue.
>
> If this is the case, there are of course two questions:
>
> 1. Where are VHDs mounted during this process?
> 2. Is the location VHDs are mounted configurable?
>
> Thanks,
> Brit

Re: VSS writer, DPM 2007 VM backups, vhdmount.exe

Sent: 07/25/2008
From: Brit
Message:

VS2005R2 SP1 with hotfix 948515 (1.1.629.0 EE R2 SP1)
DPM2007 with update Rollup 3 (2.0.8107.0)

....and nevermind about the very first two questions...I figured those out,
but:

A little further investigation revealed that the problem stems from the fact
that the VM has a basic disk and a dynamic disk. I can mount the dynamic
disk, but I have to "import foreign disk" in Disk Management on my Virtual
Server host.

This leads me to believe that the automated process of DPM using vhdmount
remotely won't work since it requires an acknowledgement in Disk Management
that the dynamic disk can be imported.

So...

1. What is the official word on protecting VMs with dynamic disks?
2. In figuring this out, I crashed my Virtual Server each time the dynamic
vhd attempted to be mounted. All the VMs stopped responding, and the server
itself had to be bounced to regain control. Fortunately the first time this
happened, I got wise and shut off the other VMs so they would not get beat up
in case it happened again.
3. The other issue was that the vhdstor.inf device had not been installed.
Seems like this should have been a part of the SP1 installation.

Anybody know about this?

"Alexander Ortha [MS]" wrote:

Show quoted text

> Hello,
>
> What versions of Virtual Server and DPM do you use?
>
> --
> Mit freundlichen GrÃ¼ÃŸen / Kind regards - Alexander Ortha (Microsoft)
>
> German Virtualization Blog
> http://blogs.technet.com/germanvirtualizationblog/default.aspx
>
> This posting is provided "AS IS" with no warranties, and confers no rights.
>
> "Brit" <(email address - cut out)> schrieb im Newsbeitrag
> news:(email address - cut out)...
> > Today I started some tests with protecting VMs using DPM 2007 and need
> > some
> > help understanding the errors I'm getting:
> >
> > The VSS writer for Virtual Server failed during the PostBackup phase,
> > during
> > the mounting of disk
> > \\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy8\VM\DAVUTIL1\DAVUTIL1.vhd
> > for
> > virtual machine DAVUTIL1. The disk did not come online within 5 minutes.
> > Confirm that the vhd mount driver in installed correctly and is able to
> > mount
> > virtual hard disks.
> >
> > After doing some research on this topic and applying hotfixes that are
> > relevant to this issue, I think I'm running into an issue whereby the vhd
> > is
> > mounted with the "undo" switch, which results in needing twice the space
> > as
> > the original vhd to mount. If there is not enough physical disk space to
> > accomodate mounting the vhd, the VM backup will not continue.
> >
> > If this is the case, there are of course two questions:
> >
> > 1. Where are VHDs mounted during this process?
> > 2. Is the location VHDs are mounted configurable?
> >
> > Thanks,
> > Brit
>

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