Running Xen server on PE720

Hello Experts.

I have a pretty interesting setup concept I want confirm will are will not work.  
Big Picture:   Run Xenserver on 3 different host (PE710,PE720,PE710) and have my vm's stored on a NetApp 2220 Unit.

As of right now I have Xen server running on a 500Gig hard drive in Dell Precision T7500,  within Xen I have created 2 vm's running 2008 R2 Ent. (1 DC, 1 Exchange 2010).   My plan was to purchase the Dell R720 with no hard drive just a 16 flash drive in it.    Install Xen Server on the flash drive of the R720,  and migrate the vm's from the Precision to the R720.  

Does anyone have a similar setup,   anything wrong with the above concept?

I also have a few VMware host I want to convert to Xen vm's to run on those boxes.
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tips54Connect With a Mentor Author Commented:
I ended up adding a Raid controller and two disk to the server to get Citrix to work.
Dirk KotteSECommented:
you should try to use similar hardware.
differences at the amount of memeory or local storage are not fatal, but the CPU should be the same over all Hosts.
with different CPU's you cant add the hosts to the same pool, except you start with cpu feature masking (enterprise license needed)

with Hosts at different pools the best way is to shutdown and export the VM from the old pool/host and reimport the VM at the new xen pool.

With XenServer 6.? you also can live migrate over pool boarders.

rumming Xenserver from flash should work.
tips54Author Commented:
I get an error on boot when I try to install the OS on the flash drive.  any suggestions?
tips54Author Commented:
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