8:40 a.m.
--=-YX/fG1gxstd3trJ7hutY
Content-Type: text/plain; charset="UTF-8"
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Hello,
does anyone have an idea on how to accomplish this? In my particular
setup, I need a FC tape drive passed though to the vm.
Note, passing throuh FC - LUNs works flawlessly.=20
If I understood Virtio -SCSI correctly, this should be possible from
libvirt's part.
Thanks!
--=20
Daniel Helgenberger=20
m box bewegtbild GmbH=20
P: +49/30/2408781-22
F: +49/30/2408781-10
ACKERSTR. 19=20
D-10115 BERLIN=20
www.m-box.de www.monkeymen.tv=20
Gesch=C3=A4ftsf=C3=BChrer: Martin Retschitzegger / Michaela G=C3=B6llner
Handeslregister: Amtsgericht Charlottenburg / HRB 112767=20
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--=-YX/fG1gxstd3trJ7hutY--
8:42 a.m.
On 04/25/2014 04:40 PM, Daniel Helgenberger wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular
setup, I need a FC tape drive passed though to the vm.
Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from
libvirt's part.
Thanks!
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
what exactly is the issue?
9:22 a.m.
--=-4QPczlD6z+VDy2a06h7W
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Hello Itamar,
sorry - forgot to mention that.
I cannot 'see' the device in oVirt as external LUN. This might because
dm-multipath is ignoring this device for some reason unknown to me; I
only see the dm'ed LUNs.
I did not temper with multipath.conf so far because it seems to be
managed by ovirt...
cheers,
On Fr, 2014-04-25 at 16:42 +0300, Itamar Heim wrote:
On 04/25/2014 04:40 PM, Daniel Helgenberger wrote:
> Hello,
>
> does anyone have an idea on how to accomplish this? In my particular
> setup, I need a FC tape drive passed though to the vm.
> Note, passing throuh FC - LUNs works flawlessly.
>
> If I understood Virtio -SCSI correctly, this should be possible from
> libvirt's part.
>
>
> Thanks!
>
>
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
=20
what exactly is the issue?
--=20
Daniel Helgenberger=20
m box bewegtbild GmbH=20
P: +49/30/2408781-22
F: +49/30/2408781-10
ACKERSTR. 19=20
D-10115 BERLIN=20
www.m-box.de www.monkeymen.tv=20
Gesch=C3=A4ftsf=C3=BChrer: Martin Retschitzegger / Michaela G=C3=B6llner
Handeslregister: Amtsgericht Charlottenburg / HRB 112767=20
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--=-4QPczlD6z+VDy2a06h7W--
8:43 a.m.
Am 25.04.2014 15:40, schrieb Daniel Helgenberger:
Hello,
does anyone have an idea on how to accomplish this? In my particular
setup, I need a FC tape drive passed though to the vm.
Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from
libvirt's part.
I don't know how much of this is implemented, so a dev
must step in, but it is designed at least, maybe it already works.
take a look yourself at:
http://www.ovirt.org/Features/Virtio-SCSI#Adding_a_DirectLUN_Disk_.28lun_...
HTH
--
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10:19 a.m.
On Fri, 25 Apr 2014 13:40:09 +0000
Daniel Helgenberger <daniel.helgenberger(a)m-box.de> wrote:
Hello,
does anyone have an idea on how to accomplish this? In my particular
setup, I need a FC tape drive passed though to the vm.
Note, passing throuh FC - LUNs works flawlessly.
If I understood Virtio -SCSI correctly, this should be possible from
libvirt's part.
I can be wrong but my understanding is that dm-mpio works on block
layer thus it does not support multipath for tapes/cd-devices.
But I could be wrong, I got this info from an OpenBSD paper comparing
SCSI multipath implementation.
j.
12:01 p.m.
--=-QCHujBjxxSJJ072LX7CG
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
On Fri, 25 Apr 2014 13:40:09 +0000
Daniel Helgenberger <daniel.helgenberger(a)m-box.de> wrote:
=20
> Hello,
>=20
> does anyone have an idea on how to accomplish this? In my particular
> setup, I need a FC tape drive passed though to the vm.
> Note, passing throuh FC - LUNs works flawlessly.=20
>=20
> If I understood Virtio -SCSI correctly, this should be possible from
> libvirt's part.
=20
I can be wrong but my understanding is that dm-mpio works on block
layer thus it does not support multipath for tapes/cd-devices.
=20
But I could be wrong, I got this info from an OpenBSD paper comparing
SCSI multipath implementation.
=20
j.
No, I think so too - it does not support tape drive as such (but I could
set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through
any scsi device; like tape drives end enclosures. I know this works in
Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
--=20
Daniel Helgenberger=20
m box bewegtbild GmbH=20
P: +49/30/2408781-22
F: +49/30/2408781-10
ACKERSTR. 19=20
D-10115 BERLIN=20
www.m-box.de www.monkeymen.tv=20
Gesch=C3=A4ftsf=C3=BChrer: Martin Retschitzegger / Michaela G=C3=B6llner
Handeslregister: Amtsgericht Charlottenburg / HRB 112767=20
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3:24 p.m.
For what it's worth, I'm also in need of this feature. Some way to
make a scsi tape available to a VM.
On Fri, Apr 25, 2014 at 12:01 PM, Daniel Helgenberger
<daniel.helgenberger(a)m-box.de> wrote:
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
> On Fri, 25 Apr 2014 13:40:09 +0000
> Daniel Helgenberger <daniel.helgenberger(a)m-box.de> wrote:
>
> > Hello,
> >
> > does anyone have an idea on how to accomplish this? In my particular
> > setup, I need a FC tape drive passed though to the vm.
> > Note, passing throuh FC - LUNs works flawlessly.
> >
> > If I understood Virtio -SCSI correctly, this should be possible from
> > libvirt's part.
>
> I can be wrong but my understanding is that dm-mpio works on block
> layer thus it does not support multipath for tapes/cd-devices.
>
> But I could be wrong, I got this info from an OpenBSD paper comparing
> SCSI multipath implementation.
>
> j.
No, I think so too - it does not support tape drive as such (but I could
set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through
any scsi device; like tape drives end enclosures. I know this works in
Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
--
Daniel Helgenberger
m box bewegtbild GmbH
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4:09 a.m.
On 04/25/2014 08:01 PM, Daniel Helgenberger wrote:
On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
> On Fri, 25 Apr 2014 13:40:09 +0000
> Daniel Helgenberger <daniel.helgenberger(a)m-box.de> wrote:
>
>> Hello,
>>
>> does anyone have an idea on how to accomplish this? In my particular
>> setup, I need a FC tape drive passed though to the vm.
>> Note, passing throuh FC - LUNs works flawlessly.
>>
>> If I understood Virtio -SCSI correctly, this should be possible from
>> libvirt's part.
>
> I can be wrong but my understanding is that dm-mpio works on block
> layer thus it does not support multipath for tapes/cd-devices.
>
> But I could be wrong, I got this info from an OpenBSD paper comparing
> SCSI multipath implementation.
>
> j.
No, I think so too - it does not support tape drive as such (but I could
set up a tape library as a LUN to use it with LTFS for instance)
The point being is another. VirtIO SCSI should be able to pass through
any scsi device; like tape drives end enclosures. I know this works in
Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
i suggest you try making it work via libivrt first, then we can compare
to the xml passed to the guest, workaround with a custom hook, etc.
7:54 p.m.
looks like libvirt should be able to do it with it's hostdev entries.
http://libvirt.org/formatdomain.html#elementsHostDevSubsys
<devices>
<hostdev mode='subsystem' type='scsi'>
<source>
<adapter name='scsi_host0'/>
<address type='scsi' bus='0' target='0'
unit='0'/>
</source>
<readonly/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</hostdev>
</devices>
...
On Sat, Apr 26, 2014 at 4:09 AM, Itamar Heim <iheim(a)redhat.com> wrote:
On 04/25/2014 08:01 PM, Daniel Helgenberger wrote:
>
>
> On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
>>
>> On Fri, 25 Apr 2014 13:40:09 +0000
>> Daniel Helgenberger <daniel.helgenberger(a)m-box.de> wrote:
>>
>>> Hello,
>>>
>>> does anyone have an idea on how to accomplish this? In my particular
>>> setup, I need a FC tape drive passed though to the vm.
>>> Note, passing throuh FC - LUNs works flawlessly.
>>>
>>> If I understood Virtio -SCSI correctly, this should be possible from
>>> libvirt's part.
>>
>>
>> I can be wrong but my understanding is that dm-mpio works on block
>> layer thus it does not support multipath for tapes/cd-devices.
>>
>> But I could be wrong, I got this info from an OpenBSD paper comparing
>> SCSI multipath implementation.
>>
>> j.
>
> No, I think so too - it does not support tape drive as such (but I could
> set up a tape library as a LUN to use it with LTFS for instance)
>
> The point being is another. VirtIO SCSI should be able to pass through
> any scsi device; like tape drives end enclosures. I know this works in
> Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
>
> Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
i suggest you try making it work via libivrt first, then we can compare to
the xml passed to the guest, workaround with a custom hook, etc.
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1:44 a.m.
On 04/28/2014 03:54 AM, Jeremiah Jahn wrote:
looks like libvirt should be able to do it with it's hostdev
entries.
http://libvirt.org/formatdomain.html#elementsHostDevSubsys
<devices>
<hostdev mode='subsystem' type='scsi'>
<source>
<adapter name='scsi_host0'/>
<address type='scsi' bus='0' target='0'
unit='0'/>
</source>
<readonly/>
<address type='drive' controller='0' bus='0'
target='0' unit='0'/>
</hostdev>
</devices>
...
so i think 'hostusb' would be a very good match for a custom hook:
http://www.ovirt.org/VDSM-Hooks
http://www.ovirt.org/VDSM-Hooks_Catalogue
http://gerrit.ovirt.org/gitweb?p=vdsm.git;a=tree;f=vdsm_hooks;
On Sat, Apr 26, 2014 at 4:09 AM, Itamar Heim <iheim(a)redhat.com> wrote:
> On 04/25/2014 08:01 PM, Daniel Helgenberger wrote:
>>
>>
>> On Fr, 2014-04-25 at 17:19 +0200, Jiri Belka wrote:
>>>
>>> On Fri, 25 Apr 2014 13:40:09 +0000
>>> Daniel Helgenberger <daniel.helgenberger(a)m-box.de> wrote:
>>>
>>>> Hello,
>>>>
>>>> does anyone have an idea on how to accomplish this? In my particular
>>>> setup, I need a FC tape drive passed though to the vm.
>>>> Note, passing throuh FC - LUNs works flawlessly.
>>>>
>>>> If I understood Virtio -SCSI correctly, this should be possible from
>>>> libvirt's part.
>>>
>>>
>>> I can be wrong but my understanding is that dm-mpio works on block
>>> layer thus it does not support multipath for tapes/cd-devices.
>>>
>>> But I could be wrong, I got this info from an OpenBSD paper comparing
>>> SCSI multipath implementation.
>>>
>>> j.
>>
>> No, I think so too - it does not support tape drive as such (but I could
>> set up a tape library as a LUN to use it with LTFS for instance)
>>
>> The point being is another. VirtIO SCSI should be able to pass through
>> any scsi device; like tape drives end enclosures. I know this works in
>> Proxmox: http://pve.proxmox.com/wiki/Tape_Drives
>>
>> Does it work in oVirt, too? In the GUI I only see block LUNs from DM.
>
>
> i suggest you try making it work via libivrt first, then we can compare to
> the xml passed to the guest, workaround with a custom hook, etc.
>
>
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> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
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9 comments
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participants (5)
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Daniel Helgenberger -
Itamar Heim -
Jeremiah Jahn -
Jiri Belka -
Sven Kieske