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Add Solution

How can I reclaim this space ?

Source: microsoft.public.virtualserver
Sent: 08/20/2008
From: "ThePro" <(email address - cut out)>
Message:

Hi,

I had a problem with some database running in a W2K3 virtual machine under
W2K8 Hyper-V. The database kept growing until it was 15 GB when it should
have been around 1 GB.

I had to expand the dynamic VHD to 18 GB to store the database. Now the
database bug is solved and it is back to 500 MB.

At the moment in the VM on Disk 0 (Dynamic) I have 3 GB "Unallocated" plus
around 9 GB free space on C: (NTFS). How can I reclaim this space ? The
"Compact" option of Hyper-V "Edit Disk" runs for 3-4 minutes but does
nothing.

Thanks for any suggestions.

ThePro

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Related Messages

Re: How can I reclaim this space ?

Sent: 08/20/2008
From: Steve Jain <(email address - cut out)>
Message:

On Wed, 20 Aug 2008 10:05:07 -0400, "ThePro"
<(email address - cut out)> wrote:

Did you defrag the VHD in the VM first?

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
I do not work for Microsoft.

Show quoted text

>Hi,
>
>I had a problem with some database running in a W2K3 virtual machine under
>W2K8 Hyper-V. The database kept growing until it was 15 GB when it should
>have been around 1 GB.
>
>I had to expand the dynamic VHD to 18 GB to store the database. Now the
>database bug is solved and it is back to 500 MB.
>
>At the moment in the VM on Disk 0 (Dynamic) I have 3 GB "Unallocated" plus
>around 9 GB free space on C: (NTFS). How can I reclaim this space ? The
>"Compact" option of Hyper-V "Edit Disk" runs for 3-4 minutes but does
>nothing.
>
>Thanks for any suggestions.
>
>ThePro

Re: How can I reclaim this space ?

Sent: 08/20/2008
From: Steve Jain <(email address - cut out)>
Message:

On Wed, 20 Aug 2008 13:48:22 -0400, "ThePro"
<(email address - cut out)> wrote:

Sure, if there is a file at the end of the VHD, and the middle is
empty, the VHD won't compact. Compacting doesn't compact the space
between files, it will compact from the last file to the end of the
VHD. That's the way it's been for VPC and Virtual Server, so I assume
that it wouldn't be any different for Hyper-V.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
I do not work for Microsoft.

Show quoted text

>"Steve Jain" <(email address - cut out)> wrote:
>> On Wed, 20 Aug 2008 10:05:07 -0400, "ThePro"
>> <(email address - cut out)> wrote:
>>
>>>Hi,
>>>
>>>I had a problem with some database running in a W2K3 virtual machine under
>>>W2K8 Hyper-V. The database kept growing until it was 15 GB when it should
>>>have been around 1 GB.
>>>
>>>I had to expand the dynamic VHD to 18 GB to store the database. Now the
>>>database bug is solved and it is back to 500 MB.
>>>
>>>At the moment in the VM on Disk 0 (Dynamic) I have 3 GB "Unallocated" plus
>>>around 9 GB free space on C: (NTFS). How can I reclaim this space ? The
>>>"Compact" option of Hyper-V "Edit Disk" runs for 3-4 minutes but does
>>>nothing.
>>>
>>>Thanks for any suggestions.
>>>
>>>ThePro
>>
>> Did you defrag the VHD in the VM first?
>>
>> --
>> Cheers,
>> Steve Jain, Virtual Machine MVP
>> http://vpc.essjae.com/
>> I do not work for Microsoft.
>
>Defraged, re-run "Compact" and nothing changed. BTW fragmentation does not
>explain why it does not reclaim the unallocated (not partitioned) space.
>
>ThePro

Re: How can I reclaim this space ?

Sent: 08/20/2008
From: "ThePro" <(email address - cut out)>
Message:

"Steve Jain" <(email address - cut out)> wrote:

Defraged, re-run "Compact" and nothing changed. BTW fragmentation does not
explain why it does not reclaim the unallocated (not partitioned) space.

ThePro

Show quoted text

> On Wed, 20 Aug 2008 10:05:07 -0400, "ThePro"
> <(email address - cut out)> wrote:
>
>>Hi,
>>
>>I had a problem with some database running in a W2K3 virtual machine under
>>W2K8 Hyper-V. The database kept growing until it was 15 GB when it should
>>have been around 1 GB.
>>
>>I had to expand the dynamic VHD to 18 GB to store the database. Now the
>>database bug is solved and it is back to 500 MB.
>>
>>At the moment in the VM on Disk 0 (Dynamic) I have 3 GB "Unallocated" plus
>>around 9 GB free space on C: (NTFS). How can I reclaim this space ? The
>>"Compact" option of Hyper-V "Edit Disk" runs for 3-4 minutes but does
>>nothing.
>>
>>Thanks for any suggestions.
>>
>>ThePro
>
> Did you defrag the VHD in the VM first?
>
> --
> Cheers,
> Steve Jain, Virtual Machine MVP
> http://vpc.essjae.com/
> I do not work for Microsoft.

Re: How can I reclaim this space ?

Sent: 09/19/2008
From: "Ryan Sokolowski [MVP]" <(email address - cut out)>
Message:

To clarify, you need to run defrag within the OS in the running VM. Steve
said it right here, it's just a sometimes confusing concept.

Hope this helps,
--Ryan

--
Ryan Sokolowski
MVP - Clustering
MCT, MCITP x3, MCTS x8, MCSE x2, CCNA, CCDA, BCFP

"Steve Jain" <(email address - cut out)> wrote in message
news:(email address - cut out)...

Show quoted text

> On Wed, 20 Aug 2008 13:48:22 -0400, "ThePro"
> <(email address - cut out)> wrote:
>
>>"Steve Jain" <(email address - cut out)> wrote:
>>> On Wed, 20 Aug 2008 10:05:07 -0400, "ThePro"
>>> <(email address - cut out)> wrote:
>>>
>>>>Hi,
>>>>
>>>>I had a problem with some database running in a W2K3 virtual machine
>>>>under
>>>>W2K8 Hyper-V. The database kept growing until it was 15 GB when it
>>>>should
>>>>have been around 1 GB.
>>>>
>>>>I had to expand the dynamic VHD to 18 GB to store the database. Now the
>>>>database bug is solved and it is back to 500 MB.
>>>>
>>>>At the moment in the VM on Disk 0 (Dynamic) I have 3 GB "Unallocated"
>>>>plus
>>>>around 9 GB free space on C: (NTFS). How can I reclaim this space ? The
>>>>"Compact" option of Hyper-V "Edit Disk" runs for 3-4 minutes but does
>>>>nothing.
>>>>
>>>>Thanks for any suggestions.
>>>>
>>>>ThePro
>>>
>>> Did you defrag the VHD in the VM first?
>>>
>>> --
>>> Cheers,
>>> Steve Jain, Virtual Machine MVP
>>> http://vpc.essjae.com/
>>> I do not work for Microsoft.
>>
>>Defraged, re-run "Compact" and nothing changed. BTW fragmentation does not
>>explain why it does not reclaim the unallocated (not partitioned) space.
>>
>>ThePro
>
> Sure, if there is a file at the end of the VHD, and the middle is
> empty, the VHD won't compact. Compacting doesn't compact the space
> between files, it will compact from the last file to the end of the
> VHD. That's the way it's been for VPC and Virtual Server, so I assume
> that it wouldn't be any different for Hyper-V.
>
> --
> Cheers,
> Steve Jain, Virtual Machine MVP
> http://vpc.essjae.com/
> I do not work for Microsoft.

Post Reply | This is Spam! | Mark as Spam

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