Re: [Xen-users] Can you convert Windows LVM domU to sparse img file?

[Ross Walker <rswwalker@xxxxxxxxx>]

On Jan 15, 2009, at 3:15 AM, "Fajar A. Nugraha" <fajar@xxxxxxxxx> wrote:

> Māris Ruskulis wrote:
> > You can do this by dd.
> > for example:
> > dd if=/dev/vg/winpart of=/home/myuser/winimage.img bs=4096
> > bs set to your block size, as i remember ntfs has 4096 by default.
> bs=32M (or whatever "PE Size" that pvdisplay shows) will probably be  
> faster.
> dd won't give you SPARSE img file though. Then again, your LV could be
> "dirty" (e.g contain deleted data) so that any "normal" attempt to
> create sparse file will not be effective.
>
> I'd suggest you just accept the full,non-sparse file that dd gives  
> you.
> An alternative would be to use ntfsresize and ntfsclone, but it  
> requires
> a lot more effort (including using kpartx,fdisk, and having a "good"  
> MBR
> handy).
1) create a sparse file the size needed

2) add it as a loop device

3) fdisk the loop device

4) ntfsclone the lv to the loop device.

That should do it in theory.

-Ross


> > James Pifer wrote:
> > > I have a Windows 2000 domU running in an LVM partition. I need to  
> > > move
> > > it to another host, but none of my other xen servers have lvm or  
> > > free
> > > space to create an lvm. So I'd like to convert it to a sparse img  
> > > file.
> > > The file system in the domU is ntfs.
> > > Can anyone suggest how to do this?
> > >
> > > Thanks,
> > > James
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