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Windows 7: Shadowstorage in Win7

26 Nov 2009   #1
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 
Shadowstorage in Win7

I have noticed that Windows 7 assigned a default of 5% for maximum shadowstorage on my C:. I am wondering whether this is now the Windows 7 standard allocation. In Vista it used to be a default 15% maximum.
Could somebody check on their system with VSSADMIN LIST SHADOWSTORAGE in elevated command prompt. Thanks.

PS: My C: is 75GB and it resides on an SSD.


My System SpecsSystem Spec
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26 Nov 2009   #2
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Hello Wolfgang,

It shows as 15% for my F: drive by default and 1% for my C: drive, but I changed the C: drive to that when turning it off so I believe it was 15% originally as well.

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My System SpecsSystem Spec
26 Nov 2009   #3
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Thank you very much for the info. Maybe they allocate less for SSDs because of the small nature of them. It does not really matter to me because i take frequent images. I was just curious.

BTW: You may want to consider a beautification of your cmd window - LOL. Here is how: Command Prompt on Vimeo

Mine looks like this: E: is my Vista OS disk and C: is the SSD in question.

My System SpecsSystem Spec
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26 Nov 2009   #4

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by whs View Post
I have noticed that Windows 7 assigned a default of 5% for maximum shadowstorage on my C:. I am wondering whether this is now the Windows 7 standard allocation. In Vista it used to be a default 15% maximum.
Could somebody check on their system with VSSADMIN LIST SHADOWSTORAGE in elevated command prompt. Thanks.

PS: My C: is 75GB and it resides on an SSD.
Hi whs

I believe max is 15% mine in snip


Kenn J++
My System SpecsSystem Spec
26 Nov 2009   #5

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

In Win 7 on computers with HD'S> 64 GB, System Restore can take up to 5 percent of the disk or a maximum of 10 GB of the disk space, whichever is less. On computers with hard drives of < 64 GB , System Restore can take at most 3 percent of the disk space.

At some point it then goes up again to (I think) 10%, then 15%.
My System SpecsSystem Spec
26 Nov 2009   #6
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by zigzag3143 View Post
Quote   Quote: Originally Posted by whs View Post
I have noticed that Windows 7 assigned a default of 5% for maximum shadowstorage on my C:. I am wondering whether this is now the Windows 7 standard allocation. In Vista it used to be a default 15% maximum.
Could somebody check on their system with VSSADMIN LIST SHADOWSTORAGE in elevated command prompt. Thanks.

PS: My C: is 75GB and it resides on an SSD.
Hi whs

I believe max is 15% mine in snip


Kenn J++
Hi Kenn, I think yours reads 10%. If I add what SIW2 says, there seems to be total confusion. Anything goes.
My System SpecsSystem Spec
26 Nov 2009   #7

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

LOL.

Sorry , not very clear.

The default will be 3% if the drive is under 64gb.

It will be 5% as soon as you go above 64gb.

At some size drive ( I haven't checked) the default goes up again - I think to 10%.

Then at an even larger size drive ( not sure yet what size that is ) , it goes up again to 15%.
My System SpecsSystem Spec
26 Nov 2009   #8
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by SIW2 View Post
LOL.

Sorry , not very clear.

The default will be 3% if the drive is under 64gb.

It will be 5% as soon as you go above 64gb.

At some size drive ( I haven't checked) the default goes up again - I think to 10%.

Then at an even larger size drive ( not sure yet what size that is ) , it goes up again to 15%.

Hmm, that could be it. My drive is exactly 74.5MB - so it could fall into the 5% category.
Do you have any link where that is described on more detail?
My System SpecsSystem Spec
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 Shadowstorage in Win7




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