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Shrinking a fixed-size VHDSource: microsoft.public.virtualserver
Sent: 03/11/2009
From: karamatic <(email address - cut out)>
Message:Hello,
I'd like to shrink an existing fixed-size VHD, I created it too big
and now I need some space...
I saw some posts about shrinking VHDs, but they all seemed to talk
about dynamically expanding ones.
If I convert my fixed disk to a dynamically exp. one, will I then be
able to lower its maximum size? this way, I could then re-convert to
fixed-size and reach my goal.
thanks
k
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Related Messages
Sent: 03/11/2009
From: "Steve Jain [MVP]" <(email address - cut out)>
Message:On Wed, 11 Mar 2009 04:04:56 -0700 (PDT), karamatic
<(email address - cut out)> wrote:
You can't shrink a fixed size disk...it's "fixed" to that size.
You can convert to a dyn-disk and then compress it. The dyn-disk
would then only use the amount of space for what data there really is.
Also, once you convert to a dyn-disk, you could use a program like
Partition Magic to resize the partiton in the dyn-disk effectively
limiting it's growth.
Also, you should just use NTFS compression on your fixed disk, this
generally results in a 40-60% decrease in the overall size of the
disk...and is the easiest solution.
--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
Show quoted text
>Hello,
>I'd like to shrink an existing fixed-size VHD, I created it too big
>and now I need some space...
>I saw some posts about shrinking VHDs, but they all seemed to talk
>about dynamically expanding ones.
>
>If I convert my fixed disk to a dynamically exp. one, will I then be
>able to lower its maximum size? this way, I could then re-convert to
>fixed-size and reach my goal.
>
>thanks
>
>k
Sent: 03/11/2009
From: "Les Connor [SBS MVP]" <(email address - cut out)>
Message:>Also, you should just use NTFS compression on your fixed disk, this
Performance implications, Steve?
--
-----------------------------------------------
Les Connor [SBS MVP]
"Steve Jain [MVP]" <(email address - cut out)> wrote in message
news:(email address - cut out)...
Show quoted text
>generally results in a 40-60% decrease in the overall size of the
>disk...and is the easiest solution.
> On Wed, 11 Mar 2009 04:04:56 -0700 (PDT), karamatic
> <(email address - cut out)> wrote:
>
>>Hello,
>>I'd like to shrink an existing fixed-size VHD, I created it too big
>>and now I need some space...
>>I saw some posts about shrinking VHDs, but they all seemed to talk
>>about dynamically expanding ones.
>>
>>If I convert my fixed disk to a dynamically exp. one, will I then be
>>able to lower its maximum size? this way, I could then re-convert to
>>fixed-size and reach my goal.
>>
>>thanks
>>
>>k
>
> You can't shrink a fixed size disk...it's "fixed" to that size.
>
> You can convert to a dyn-disk and then compress it. The dyn-disk
> would then only use the amount of space for what data there really is.
> Also, once you convert to a dyn-disk, you could use a program like
> Partition Magic to resize the partiton in the dyn-disk effectively
> limiting it's growth.
>
> Also, you should just use NTFS compression on your fixed disk, this
> generally results in a 40-60% decrease in the overall size of the
> disk...and is the easiest solution.
>
> --
> Cheers,
> Steve Jain, Virtual Machine MVP
> http://vpc.essjae.com/
Sent: 03/11/2009
From: "Les Connor [SBS MVP]" <(email address - cut out)>
Message:Excellent news, actually ;-).
--
-----------------------------------------------
Les Connor [SBS MVP]
"Robert Comer" <(email address - cut out)> wrote in message
news:(email address - cut out)...
Show quoted text
> Very little actually, but it does depend on load.
>
> I always NTFS compress my VHD's.
>
> --
> Bob Comer
>
>
>
> On Wed, 11 Mar 2009 13:40:04 -0500, "Les Connor [SBS MVP]"
> <(email address - cut out)> wrote:
>
>>>Also, you should just use NTFS compression on your fixed disk, this
>>>generally results in a 40-60% decrease in the overall size of the
>>>disk...and is the easiest solution.
>>
>>
>>Performance implications, Steve?
Sent: 03/11/2009
From: Robert Comer <(email address - cut out)>
Message:Very little actually, but it does depend on load.
I always NTFS compress my VHD's.
--
Bob Comer
On Wed, 11 Mar 2009 13:40:04 -0500, "Les Connor [SBS MVP]"
<(email address - cut out)> wrote:
Show quoted text
>>Also, you should just use NTFS compression on your fixed disk, this
>>generally results in a 40-60% decrease in the overall size of the
>>disk...and is the easiest solution.
>
>
>Performance implications, Steve?
Sent: 03/11/2009
From: "Les Connor [SBS MVP]" <(email address - cut out)>
Message:OK, well that changes everything ;-/.
--
-----------------------------------------------
Les Connor [SBS MVP]
"Paul Adare" <(email address - cut out)> wrote in message
news:gmcql37wfaf5$.1o23y92lqnnuk$(email address - cut out)...
Show quoted text
> On Wed, 11 Mar 2009 14:22:54 -0500, Les Connor [SBS MVP] wrote:
>
>> Excellent news, actually ;-).
>
> Not a good habit to get into if you're using Hyper-V. As of Server 2008 R2
> (Windows 7 Server) NTFS compressed VHDs are no longer supported and can't
> be used.
>
> --
> Paul Adare
> MVP - Identity Lifecycle Manager
> http://www.identit.ca
Sent: 03/11/2009
From: Paul Adare <(email address - cut out)>
Message:On Wed, 11 Mar 2009 14:22:54 -0500, Les Connor [SBS MVP] wrote:
Not a good habit to get into if you're using Hyper-V. As of Server 2008 R2
(Windows 7 Server) NTFS compressed VHDs are no longer supported and can't
be used.
--
Paul Adare
MVP - Identity Lifecycle Manager
http://www.identit.ca
Show quoted text
> Excellent news, actually ;-).
Sent: 03/11/2009
From: Paul Adare <(email address - cut out)>
Message:On Wed, 11 Mar 2009 20:45:26 +0100, Bo Berglund wrote:
You're missing the entire point of this discussion. We're talking about the
VHDs themselves being NTFS compressed, not using NTFS compression inside
the virtual machines. That has never been a good idea.
--
Paul Adare
MVP - Identity Lifecycle Manager
http://www.identit.ca
Show quoted text
> On Wed, 11 Mar 2009 15:36:15 -0400, Paul Adare <(email address - cut out)>
> wrote:
>
>>On Wed, 11 Mar 2009 14:22:54 -0500, Les Connor [SBS MVP] wrote:
>>
>>> Excellent news, actually ;-).
>>
>>Not a good habit to get into if you're using Hyper-V. As of Server 2008 R2
>>(Windows 7 Server) NTFS compressed VHDs are no longer supported and can't
>>be used.
>
> Isn't a virtual machine supposed to provide hardware emulation on
> which an operating system can be isntalled and working?
> If said operating system then compresses files or entire drive
> contents inside the virtual environment, how could that impact the
> virtualization service such that it cannot be used?????
> Makes no sense to me at all.
>
> Maybe you meant something else?
Sent: 03/11/2009
From: Robert Comer <(email address - cut out)>
Message:I didn't know that, though I expect part of it is the VHD booting. Not
sure I "like" that limitation.
--
Bob Comer
On Wed, 11 Mar 2009 15:36:15 -0400, Paul Adare <(email address - cut out)>
wrote:
Show quoted text
>On Wed, 11 Mar 2009 14:22:54 -0500, Les Connor [SBS MVP] wrote:
>
>> Excellent news, actually ;-).
>
>Not a good habit to get into if you're using Hyper-V. As of Server 2008 R2
>(Windows 7 Server) NTFS compressed VHDs are no longer supported and can't
>be used.
Sent: 03/11/2009
From: Bo Berglund <(email address - cut out)>
Message:On Wed, 11 Mar 2009 15:36:15 -0400, Paul Adare <(email address - cut out)>
wrote:
Isn't a virtual machine supposed to provide hardware emulation on
which an operating system can be isntalled and working?
If said operating system then compresses files or entire drive
contents inside the virtual environment, how could that impact the
virtualization service such that it cannot be used?????
Makes no sense to me at all.
Maybe you meant something else?
--
Bo Berglund (Sweden)
Show quoted text
>On Wed, 11 Mar 2009 14:22:54 -0500, Les Connor [SBS MVP] wrote:
>
>> Excellent news, actually ;-).
>
>Not a good habit to get into if you're using Hyper-V. As of Server 2008 R2
>(Windows 7 Server) NTFS compressed VHDs are no longer supported and can't
>be used.
Sent: 03/12/2009
From: Andrew Tapp
Message:You could try http://vmtoolkit.com/files/default.aspx and look for VHDResizer.
Hope this helps.
"karamatic" wrote:
Show quoted text
> Hello,
> I'd like to shrink an existing fixed-size VHD, I created it too big
> and now I need some space...
> I saw some posts about shrinking VHDs, but they all seemed to talk
> about dynamically expanding ones.
>
> If I convert my fixed disk to a dynamically exp. one, will I then be
> able to lower its maximum size? this way, I could then re-convert to
> fixed-size and reach my goal.
>
> thanks
>
> k
>
Sent: 03/12/2009
From: karamatic <(email address - cut out)>
Message:On 11 Mar, 19:28, "Steve Jain [MVP]" <(email address - cut out)> wrote:
Thanks a lot! But let's say I need to keep a fixed-size VHD, and don't
want to use NTFS compression. If I convert my VHD to dyn-exp, then
resize the partition, then compact the VHD, I will get a smaller VHD
file but... will then I be able to adjust its maximum growth size?
Only this way I could then re-convert to fixed-size, having, at last,
a smaller fixed-size VHD.
thanks
k
Show quoted text
> On Wed, 11 Mar 2009 04:04:56 -0700 (PDT), karamatic
>
> <(email address - cut out)> wrote:
> >Hello,
> >I'd like to shrink an existing fixed-size VHD, I created it too big
> >and now I need some space...
> >I saw some posts about shrinking VHDs, but they all seemed to talk
> >about dynamically expanding ones.
>
> >If I convert my fixed disk to a dynamically exp. one, will I then be
> >able to lower its maximum size? this way, I could then re-convert to
> >fixed-size and reach my goal.
>
> >thanks
>
> >k
>
> You can't shrink a fixed size disk...it's "fixed" to that size.
>
> You can convert to a dyn-disk and then compress it. =A0The dyn-disk
> would then only use the amount of space for what data there really is.
> Also, once you convert to a dyn-disk, you could use a program like
> Partition Magic to resize the partiton in the dyn-disk effectively
> limiting it's growth.
>
> Also, you should just use NTFS compression on your fixed disk, this
> generally results in a 40-60% decrease in the overall size of the
> disk...and is the easiest solution.
>
> --
> Cheers,
> Steve Jain, Virtual Machine MVPhttp://vpc.essjae.com/
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