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[Xen 4.1.2] xm create error, help needed creating domain (Fedora 16)

post #1 of 5
Thread Starter 
I have figured out most of my errors in the domain configuration file and think I have what I need to create a new domain. I am new to xen so be patient redface.gif using this config file:
Code:
#  -*- mode: python; -*-
kernel = "/usr/lib/xen/boot/hvmloader"
builder = "hvm"
memory = 4096
device_model= "/usr/lib/xen/bin/qemu-dm"
name = "win7a"
vif = [ '' ]
disk=['phy:/dev/dm-1,sda1,w']
vnc= 1
vnclisten= "127.0.0.1"
vncdisplay= 1
dhcp="dhcp"
hostname= "Domain-0"
#root = "/dev/dm-1" 
#extra = "4"

with a command of:
$sudo xm create /etc/xen/win7a/win7a.cfg
Error: Domain 'win7a' does not exist.

Now I was under the impression that I was trying to create said domain, so of course it wouldn't exist. What do I need to do in order for this to work?

Thanks in advance.
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post #2 of 5
just curious why you are using xen instead of kvm? .. xen is kind of but not officially deprecated

http://www.linux-kvm.org/page/Main_Page
http://libvirt.org/
http://virt-manager.org/
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by lloyd mcclendon View Post

just curious why you are using xen instead of kvm? .. xen is kind of but not officially deprecated
http://www.linux-kvm.org/page/Main_Page
http://libvirt.org/
http://virt-manager.org/

I guess I had just seen the results I was looking for with Xen. Fedora uses KVM iirc, virt-manager is pre-packaged. The thing I would really like to know about KVM is wheather HVM machines were well supported and directed I/O passthrough to guests was enabled. That would theoretically solve my problem.

Thanks for your help thumb.gif
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post #4 of 5
the answer to both of your questions is YES and YES. I guess the only advantage of xen is that it can run software emulation for CPUs without VT extensions... but why would you want to do that... you have a chip made after 2005 right thumb.gif

http://www.linux-kvm.org/page/FAQ#What_is_Intel_VT_.2F_AMD-V_.2F_hvm.3F

sorry i can't help with your xen problem ... its not looking good that anyone else here can either. redface.gif
Edited by lloyd mcclendon - 1/11/12 at 10:23pm
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post #5 of 5
Thread Starter 
Xen also does HVM (AMD-v and VT-x) and 4.1.2 has support for IOMMU which compiles by default now. I also read that vga passthrough was a very simple matter for ATI cards (more than other VMs) as primary AND secondary devices. This is why I gravitated towards Xen. The current release of KVM seems to present more work arounds to achieve the same goal. Virt-manager also supports the XEN hypervisor which is nice, but can cause problems. Anyway, I have been able to create the guests finally, but when I attempt to start the guest it gives me a couple errors (depending on config files.)

The first one is due to the vif settings, which I am curently trying to resolve since I am trying to bridge a wireless connection. The process is supposedly to create a dummy interface and bridge that.

Secondly, and where I am still baffled is this error.
Code:
[root@dom0 xenhost]# xm start --vncviewer win7a
Error: Domain unable to be unpaused: an integer is required

Any reason this would happen?
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Dream Rig (AMD)
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Corsair Force 3 180gb Seagate Barracuda STBD2000101 2x in RAID1 Lubuntu / Win 8.1 / CentOS 6.4 -- Xen 4.3 FSP 80+ Micro-ATX 450w 
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CPUMotherboardGraphicsGraphics
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G.Skill Trident X Series 32GB (4 x 8GB) DDR3-1866 Seagate Barracuda 1TB 3.5" 7200RPM x2 RAID 1 Corsair Force Series GT 120GB x2 RAID 0 NZXT Kraken X60 
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CPUMotherboardGraphicsGraphics
i7-3930k ASrock X79 EXTREME4-M SAPPHIRE Radeon HD 7870 GHz Edition 2GB  AMD FirePro W5000 
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G.Skill Ripjaws Z Series 32GB (4 x 8GB) DDR3-1866 2x Corsair Force Series 3 180GB RAID 0 2x Western Digital Red 2TB RAID 1 Noctua NH-D14 SE2011 
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