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Dynamically expanding virtual hard disk?

B

Bo Berglund

#1
I just would like to know if anyone here can explain *how* the
dynamically expanding disk grows?

If I compare to an SQLServer database (which I am familiar with) where
one specifies by how much it will expand the database file when
needed, I don't find such a setting for a VHD.

So what is the principle used when the guest needs to store more data
in the disk? A fresh VHD file is very small, like 35 kbytes or so,
what happens when the guest adds data, for example when an operating
system is installed?

Is there a specific amount of host disk space added when it expands?

--

Bo Berglund (Sweden)
 

My Computer

S

Steve Jain [MVP]

#2
On Sat, 29 Nov 2008 23:45:04 +0100, Bo Berglund <boberglund@xxxxxx>
wrote:

>I just would like to know if anyone here can explain *how* the
>dynamically expanding disk grows?
>
>If I compare to an SQLServer database (which I am familiar with) where
>one specifies by how much it will expand the database file when
>needed, I don't find such a setting for a VHD.
>
>So what is the principle used when the guest needs to store more data
>in the disk? A fresh VHD file is very small, like 35 kbytes or so,
>what happens when the guest adds data, for example when an operating
>system is installed?
>
>Is there a specific amount of host disk space added when it expands?
Previously, its been in 2MB chunks.

--
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
 

My Computer

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