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Re: [Xen-users] In the process of deciding to virtualize, manyuncertaint

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] In the process of deciding to virtualize, manyuncertainties
From: "harry@xxxxxxxxxxxx" <harry@xxxxxxxxxxxx>
Date: Fri, 29 Oct 2010 10:49:01 -0400
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Hi Ken,

Your suggestion to let dom0 handle the usb hdd and the printer, is only a
partial solution. My Linux client needs access to the usb card readers. Are
you telling me that I can mount these with nfs ?

If not, I would like to look closer to the software solution from
incentivespro.com. But it looks like I need some help in installing "make".
Did some reading on the subject, and find it hard to believe I need to
download the entire 250 mb dev kit, and go through what I find a
complicated virtualization routine to get make on the server.

Grateful for any comments, looking forward to hear from you. Thank you for
your help so far.



Original Message:
From:  kcobler@xxxxxxxxxxxxxx
Date: Fri, 29 Oct 2010 07:10:59 -0500
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] In the process of deciding to

Quoting "harry@xxxxxxxxxxxx" <harry@xxxxxxxxxxxx>:

> Hi all,
> did some more research after the tip on the USB server. Seems that none of
> the hardware solutions support linux VMs.
> However, I found one link to a free software solution, tested by a linux
> user, and he claims it works just fine. His story you can find here:
> tion-that-i-use-every-day/
> The software you can find here: http://www.incentivespro.com
> Of course, I stumbled on my first problem:
> The installer tells me this:
> ---------------------------------------------
> Kernels versions 2.6.25 through have a bug with EHCI USB
> controllers that leads to large memory leaks with isochronous devices like
> Webcams or Sound cards.
> If you have patched your kernel against this bug - please manually
> recompile the driver executing 'make USE_EHCI_FIX=n' command. Otherwise
> Server will try to automatically walk around this bug (without guaranties)
> See http://patchwork.kernel.org/patch/13428/ for more information.
> Please do not worry about this warning if you are not going to use USB 2.0
> isochronous devices on your system.
> ----------------------------------------------
> Xenserver 5.6.0 is running on I basically don't know if this
> will be an issue for me (I am only using USB HDDs, USB printer and USB
> readers), so I decided for now just to skip this recompiling message.
> be nice though if anybody can tell me if XenServer still has this bug?
> Second problem is when I continue with the installer I get the error "make
> command not found". On the Xenserver site I found information on this
> topic, where it is said that make is not included.
> http://forums.citrix.com/thread.jspa?threadID=245559
> Developer kid needs to be installed. Can somebody tell me if there is
> another way? Like downloading cmake from the internet and compile it? If
> not, is there a more detailed description in how to fix this?
> Would be great if this software would work. The software vendor claims
> it supports VMware.
> Regards,
> Harry
>> if the know issues are going to be solved:
>> - USB printer in XP VM
>> - HDD via USB cable visible in XP VM
>> - Burning DVDs on XP VM
> My solution for USB in a VM environment is USB over IP device.
> This device allowed me to add a USB hub to support multiple USB
> devices. Also the device is supported by Windows 2003/XP, etc. I also
> could have different devices attached to different VMs at the same time.

Since XP is supported by many USB over IP devices, there are solutions  
for those guest OSes.

As for Linux guest OS, I would let dom0 manage the device for the  
Linux guests. Use Samba or NFS to mount the USB HDD to the Linux  
guests. Use CUPS to access USB printer on dom0 inside Linux or XP guest.

Ken Cobler

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