minimum partition size for vista 64 bit install?

Vista requirements list this as hardware requirement:
40 GB hard drive with at least 15 GB of available space

I want to create a dual boot partition between XP 32 and Vista 64 on a
brand new system.
That means three partitions: one for xp installation, one for vista
installation, and one for data.


What's a reasonable amount to make the installation partitions (that
allows for growth). ?

I have a 320 gig drive and don't plan to install Vista 64 bit until sp
1. I want to keep all my user data on the data partition on the same
drive; on the other hand, I don't want to shortchange myself
(especially with a hard drive that size).



Robert Nagle
Houston, Texas
http://www.imaginaryplanet.net/weblogs/idiotprogrammer/

I would also cut way down the amount of virtual ram each OS uses. For XPSP2,
I have my virtual ram at 512mb, and Vista 64 is the same.

??????


"Carl" <me@theworld.universe> wrote in message
news:E31EAB86-9CE1-4274-95D2-6AED9DC6C629@microsoft.com...
>I would also cut way down the amount of virtual ram each OS uses. For
>XPSP2, I have my virtual ram at 512mb, and Vista 64 is the same.

"idiotprogrammer" <idiotprogrammer@gmail.com> wrote in message
news:1191537026.008184.99380@57g2000hsv.googlegrou ps.com...
> Vista requirements list this as hardware requirement:
> 40 GB hard drive with at least 15 GB of available space
>
> I want to create a dual boot partition between XP 32 and Vista 64 on a
> brand new system.
> That means three partitions: one for xp installation, one for vista
> installation, and one for data.
>
>
> What's a reasonable amount to make the installation partitions (that
> allows for growth). ?
>
> I have a 320 gig drive and don't plan to install Vista 64 bit until sp
> 1. I want to keep all my user data on the data partition on the same
> drive; on the other hand, I don't want to shortchange myself
> (especially with a hard drive that size).
>
>


I setup a dual-boot XP_32 , XP_64 system about 18 months ago...

I don't think the XP_32 side has been used in about a year now...XP_64 works
so well.

At any rate I certainly would not go under 20 gigs for the OS partition