Xen users - Feb 2007 - how to make usb drive work with domU ?

Hia..
If i am not wrong, in past someone told me that USB Drive can be accessed in
virtual machine by configuring it. 
So could any one just let me know how to get hold of this issue....

Thanks
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On 2/20/07, anant <ANigam@uclan.ac.uk> wrote:
>
> Hia..
> If i am not wrong, in past someone told me that USB Drive can be accessed
in
> virtual machine by configuring it.
as /dev/sdX as any other block device.

Not as usb device. In paravirtual mode there''s no usb forwarding,
AFAIK, in HVM there is something, but for it did''n t work - see bug
906 in bugzilla.

Henning

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>>as /dev/sdX as any other block device.
>>Not as usb device. In paravirtual mode there''s no usb
forwarding,
>>AFAIK, in HVM there is something, but for it did''n t work - see
bug
>>906 in bugzilla.
i didnt get you...
I am having fully virtualized sys with win xp as a guest. So is it possible
to have access of usb drive/pen drive over win xp(virtual machine) or not.

And this BUGZILLA 906 bug is showing different topics if you google it.
Anyway,
Thanks for replying.


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> -----Original Message-----
> From: xen-users-bounces@lists.xensource.com 
> [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of anant
> Sent: 20 February 2007 14:56
> To: xen-users@lists.xensource.com
> Subject: Re: [Xen-users] how to make usb drive work with domU ?
> 
> 
> >>as /dev/sdX as any other block device.
> >>Not as usb device. In paravirtual mode there''s no usb
forwarding,
> >>AFAIK, in HVM there is something, but for it did''n t work
- see bug
> >>906 in bugzilla.
> 
> i didnt get you...
> I am having fully virtualized sys with win xp as a guest. So 
> is it possible
> to have access of usb drive/pen drive over win xp(virtual 
> machine) or not.
You can CERTAINLY (as I''ve mentioned before) use USB-drives from
Windows, but they won''t appear as a USB device from Windows itself,
they
will appear like a hard-drive. If you actually want USB functionality
(as in the ability to plug things in and unplug again without suing
"tricks", then you will need USB-device-handling within Xen, which I
think is the point of bugzilla 906).
> 
> And this BUGZILLA 906 bug is showing different topics if you 
You can''t google just for bugzilla 906 or at least not to find just one
bug... That''s like googling for "17 High Street" without
specifying a
town - you''ll find one in just about every town in England. Xen
Bugzilla
is on http://bugzilla.xensource.com/bugzilla/index.cgi

--
Mats
> google it.
> Anyway,
> Thanks for replying.
> 
> 
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> 
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> 
> 
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> 
> 
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On 20 Feb 2007 at 5:28, anant wrote:
> 
> Hia..
> If i am not wrong, in past someone told me that USB Drive can be accessed
in
> virtual machine by configuring it. 
You could be more concrete about the past and someone. Yes, If you mount an USB 
drive in Dom0, you can make it available to DomU just like other drives, 
partitions, and filesystems.
> So could any one just let me know how to get hold of this issue....
PBTW: People using "..." too frequently are usually lazy to describe
their
problems in detail.

Ulrich


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On Wed, 2007-02-21 at 08:39 +0100, Ulrich Windl wrote:
> 
> PBTW: People using "..." too frequently are usually lazy to
describe their
> problems in detail.
Sometimes this means they don''t quite understand the problem, they
simply understand that they have a problem, or spent too much time
chatting on-line in the early 90''s.

Before IM services and IRC, chat was often real time. You would see the
other person type as they typed. Clients like Telix that connected to
servers (like BBS systems) often did not interpret \n \0 (\r\n)
correctly and an indicator that "I''m done talking" had to be
employed.

This was also sometimes the fault of the software handling the
connection (WWIV was famous for this).

"..." was understood to mean "Go ahead, I''ve shut up and
its your
turn.". 

So, this person is probably not just lazy, they are also probably old. 
> Ulrich
I hope someone other than me finds the intended humor in this post, I''m
not the best at it.

Best,
--Tim
> 
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<You can CERTAINLY (as I''ve mentioned before) use USB-drives from 
<Windows, but they won''t appear as a USB device from Windows itself,
they
<will appear like a hard-drive

What exactly do you mean by "use USB-drives from windows",Well i dont
care
if it will appear like a directory or like normal ..I should be able to
access the data from my usb drive over virtual windows. Thats what i want. 

Ill go through that bugzilla, i think i need an account for it and cant
access my email add at the moment...so will look into that later, but if its
there as a bug then i guess its not possible to have usb-drive working that
way..Anyway ill look into it tonight.

Thanks  
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On 2/20/07, anant <ANigam@uclan.ac.uk> wrote:
> i didnt get you...
> I am having fully virtualized sys with win xp as a guest. So is it possible
> to have access of usb drive/pen drive over win xp(virtual machine) or not.
>
Again: it depends on _how_ you want to do it:

You can export it as block device, as any other block device.
When you put in your usb stick, it is mapped to something like
/dev/sdb or so, in the dom0 system,  and you can export this with the
Xen VMs disk config, as any other block device, then the block device
is available in the guest.

The second way:
Exporting USB ports so they are available as USB ports/devices in the
guest, _should_ work according to the xen manual, but does not for me.
> And this BUGZILLA 906 bug is showing different topics if you google it.
Don''t know where you googled, the Xen bugzilla system has this bug
registered (by me):

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=906

Hope this makes things more clear now...
Henning

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> You could be more concrete about the past and someone. Yes, If you mount an
> USB drive in Dom0, you can make it available to DomU just like other
> drives, partitions, and filesystems.
nb. don''t actually *mount* the drive in dom0 if you''re going
to export it to
the guess (unless you use NFS or something like that).  Mounting a device 
writeable in multiple domains is a sure way to trash your filesystem.

Cheers,
Mark
> > So could any one just let me know how to get hold of this issue....
>
> PBTW: People using "..." too frequently are usually lazy to
describe their
> problems in detail.
>
> Ulrich
>
>
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> http://lists.xensource.com/xen-users
-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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> Hia..
> If i am not wrong, in past someone told me that USB Drive can be accessed
> in virtual machine by configuring it.
> So could any one just let me know how to get hold of this issue....
In the special case of a USB drive, plug it into dom0 and export the phy: 
device corresponding to it into the guest.  Look up what device your USB 
drive is in dom0 (e.g. look in the dmesg output), then use that as the phy: 
device to export.  In the guest it''ll appear as a normal hard drive.  
*however* the guest won''t know it''s a USB drive, so you need
to unmount it
(or equivalent) to make sure the data is flushed before you remove the USB 
stick (and then you should probably xm block-remove before you unplug the 
stick).

The other posters in this thread have been talking about dedicating a host USB 
port to guest control: that can be done in principle, but support seems to be 
buggy at the moment.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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Hi thanks for the reply..
How can i export the phy. drive to guest. 
Can you pls provide me with exact command and steps..
Thanks

Mark Williamson wrote:
> 
>> Hia..
>> If i am not wrong, in past someone told me that USB Drive can be
accessed
>> in virtual machine by configuring it.
>> So could any one just let me know how to get hold of this issue....
> 
> In the special case of a USB drive, plug it into dom0 and export the phy: 
> device corresponding to it into the guest.  Look up what device your USB 
> drive is in dom0 (e.g. look in the dmesg output), then use that as the
> phy: 
> device to export.  In the guest it''ll appear as a normal hard
drive.
> *however* the guest won''t know it''s a USB drive, so you
need to unmount it
> (or equivalent) to make sure the data is flushed before you remove the USB 
> stick (and then you should probably xm block-remove before you unplug the 
> stick).
> 
> The other posters in this thread have been talking about dedicating a host
> USB 
> port to guest control: that can be done in principle, but support seems to
> be 
> buggy at the moment.
> 
> Cheers,
> Mark
> 
> -- 
> Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
> Mark: To answer a question with a question: What use is a skateboard?
> Dave: Skateboards have wheels.
> Mark: My wheel has a wheel!
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
> 
> 
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> -----Original Message-----
> From: xen-users-bounces@lists.xensource.com 
> [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of anant
> Sent: 28 February 2007 09:10
> To: xen-users@lists.xensource.com
> Subject: Re: [Xen-users] how to make usb drive work with domU ?
> 
> 
> Hi thanks for the reply..
> How can i export the phy. drive to guest. 
> Can you pls provide me with exact command and steps..
xm block-attach <domain> <backdev> <frontdev> <mode>

For example:
xm block-attach my-domain phy:/dev/sdb1 hdb r

Of course, you can also add it to the config file if you wish to do this
statically - in which case you just use the disk= statement to add the
block-device. 

--
Mats
> Thanks
> 
> Mark Williamson wrote:
> > 
> >> Hia..
> >> If i am not wrong, in past someone told me that USB Drive 
> can be accessed
> >> in virtual machine by configuring it.
> >> So could any one just let me know how to get hold of this
issue....
> > 
> > In the special case of a USB drive, plug it into dom0 and 
> export the phy: 
> > device corresponding to it into the guest.  Look up what 
> device your USB 
> > drive is in dom0 (e.g. look in the dmesg output), then use 
> that as the
> > phy: 
> > device to export.  In the guest it''ll appear as a normal 
> hard drive.  
> > *however* the guest won''t know it''s a USB drive, so
you
> need to unmount it 
> > (or equivalent) to make sure the data is flushed before you 
> remove the USB 
> > stick (and then you should probably xm block-remove before 
> you unplug the 
> > stick).
> > 
> > The other posters in this thread have been talking about 
> dedicating a host
> > USB 
> > port to guest control: that can be done in principle, but 
> support seems to
> > be 
> > buggy at the moment.
> > 
> > Cheers,
> > Mark
> > 
> > -- 
> > Dave: Just a question. What use is a unicyle with no seat?  
> And no pedals!
> > Mark: To answer a question with a question: What use is a 
> skateboard?
> > Dave: Skateboards have wheels.
> > Mark: My wheel has a wheel!
> > 
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xensource.com
> > http://lists.xensource.com/xen-users
> > 
> > 
> 
> -- 
> View this message in context: 
> http://www.nabble.com/how-to-make-usb-drive-work-with-domU---t
> f3260481.html#a9200345
> Sent from the Xen - User mailing list archive at Nabble.com.
> 
> 
> _______________________________________________
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> 
> 
> 


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