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> Install Windows 7 ON a Virtual Drive, using a .vhd file and booting from it!
 
 Spacesurfer
post Mar 1 2009, 03:14 AM
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QUOTE (allanf @ Feb 26 2009, 09:37 PM) *
OK. So what happens when Win7 is to be installed into a VHD on a computer with an existing OS such as XP on a single Partition? Firstly, it would appear that, when booted to the "native" VHD Win7, the previously existing OS Partition is designated as the System Partition without a Drive Letter and still housing the boot stuff as well as the old OS. (Thanks to spacesurfer for initial discoveries.)

Well, the 200 mb partition is NOT an absolute requirement. If you already have an active system partition, then Windows 7 setup will not create the 200 mb partition. If there is no active system partition, then Windows 7 setup will create this partition. To avoid getting a 200 mb partition if you are installing on a fresh HDD, you can start Vista setup, create the partitions, format, make active, then quit Vista setup, then install Windows 7.

For installing Windows 7 to a VHD, however, setup will not alter you physical partitions and it does not create a 200 mb partition in the VHD either. A VHD install does two things, basically 1) Add boot entries to your Vista boot file (bcd), and 2) install to your VHD.

So, if you wanted to get rid of Windows 7, all you need to do is delete the VHD and delete the boot entry from Vista boot file (bcd)
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 allanf
post Mar 1 2009, 04:06 AM
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QUOTE (Spacesurfer @ Mar 1 2009, 02:14 PM) *
Well, the 200 mb partition is NOT an absolute requirement. If you already have an active system partition, then Windows 7 setup will not create the 200 mb partition. If there is no active system partition, then Windows 7 setup will create this partition.

The point of this exercise is that I do have an existing System Partition, and I do want this nice new clean 200MB Active Primary Parttion. The basic setup will not create the new one with my current configuration. The size is simply a requirement for BitLocker according to the Documentation.


QUOTE
... you can start Vista setup, create the partitions, format, make active, then quit Vista setup, then install Windows 7.

That's basically what I'm doing, except I don't have the Vista Install DVD to run it's setup. And rather than running the Windows PE 2.1 (Vista SP1), I'm going to use Windows PE 3.0 (Win7) to do the initial configuration work, and then to install the VHD.


QUOTE
For installing Windows 7 to a VHD, however, setup will not alter you physical partitions and it does not create a 200 mb partition in the VHD either. A VHD install does two things, basically 1) Add boot entries to your Vista boot file (bcd), and 2) install to your VHD.

That's why I'm going to do it manually. The most important query I have is the number of reboots and what determines what is booted. I'd rather not lose control of the situation.

Also a bit worried about the point where drivers are installed for the VHD because my current single c:\ Partition is actually a RAID0 Array.

The other thing is that when installing to an attached VHD, I have read that the setup does not list a VHD per se. It is listed as unallocated space. Where does the unallocated space come from when the a configuration has been made with only one shrunk Windows Partition for XP and the manually-created 200MB System Partition?


QUOTE
So, if you wanted to get rid of Windows 7, all you need to do is delete the VHD and delete the boot entry from Vista boot file (bcd)

That sounds like the easy bit. ... (IMG:../forums/style_emoticons/default/biggrin.gif) ... Getting to that point, it seems like a long road for me.

Most of the info comes from you, spacesurfer, with thanks. Don't hesitate to put me straight because I'm sailing uncharted waters here. ... (IMG:../forums/style_emoticons/default/biggrin.gif) ...

Regards (IMG:../forums/style_emoticons/default/smile.gif)
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 conqrr
post Mar 1 2009, 08:01 AM
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cant wait to see how u proceed allanf, i have a win7vhd and want to boot from it , currently on xp single boot and dont hav a vista boot menu
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 Spacesurfer
post Mar 1 2009, 04:47 PM
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QUOTE (conqrr @ Mar 1 2009, 03:01 AM) *
cant wait to see how u proceed allanf, i have a win7vhd and want to boot from it , currently on xp single boot and dont hav a vista boot menu
Well, if you want to boot from VHD you need a boot manager capable of doing that. Vista's boot mananger (bootmgr/winload.exe) is capable and XP's boot manager (ntldr/boot.ini) is not capable.

To date, I don't know of a way to actually install Windows 7 with XP installed. I'm not sure if Windows 7 changes XP boot manager to it's own and allows XP to load. That's a matter of exploration.
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 jaclaz
post Mar 1 2009, 05:45 PM
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QUOTE (Spacesurfer @ Mar 1 2009, 06:47 PM) *
To date, I don't know of a way to actually install Windows 7 with XP installed. I'm not sure if Windows 7 changes XP boot manager to it's own and allows XP to load. That's a matter of exploration.


Spacesurfer,
you should read this also:
http://www.boot-land.net/forums/index.php?...ic=7260&hl=

You can use a floppy or floppy image to boot the Windows 7 on Windows XP machines. (IMG:../forums/style_emoticons/default/wink.gif)

jaclaz
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