9:23 a.m.
Hi list!
When we upgraded our ovirt environment to 4.1 we get the virtio-scsi
interface as default for virtual disks.
We have seen a difference in drive order from when we used the virtio
interface.
Before when we added disks the order of the drives were set by which order
the disks was created.
So if i had 1 disk as os disk it became vda and added a 50 GB disk that
disk became vdb and then added another 8GB disk that became vdc.
But now when i add two additional disks with the virtio-scsi interface like
the above when i reboot the vm the 50GB disk become sdc and the 8GB disk
become sdb even that i created the 50GB disk first?
How is the order decided in the virtio-scsi interface?
What can i do to ensure that the disks come in the order that i create them?
Regards
Christian
9:38 a.m.
On Mar 16, 2017 9:23 AM, "gflwqs gflwqs" <gflwqs(a)gmail.com> wrote:
Hi list!
When we upgraded our ovirt environment to 4.1 we get the virtio-scsi
interface as default for virtual disks.
We have seen a difference in drive order from when we used the virtio
interface.
Before when we added disks the order of the drives were set by which order
the disks was created.
So if i had 1 disk as os disk it became vda and added a 50 GB disk that
disk became vdb and then added another 8GB disk that became vdc.
But now when i add two additional disks with the virtio-scsi interface like
the above when i reboot the vm the 50GB disk become sdc and the 8GB disk
become sdb even that i created the 50GB disk first?
How is the order decided in the virtio-scsi interface?
What can i do to ensure that the disks come in the order that i create them?
Based on their id on the scsi bus. Use /dev/disk-by-id or so and not sdX
which might change.
Y.
Regards
Christian
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Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
11:56 a.m.
On 16/03/17 08:23 +0100, gflwqs gflwqs wrote:
Hi list!
When we upgraded our ovirt environment to 4.1 we get the virtio-scsi
interface as default for virtual disks.
We have seen a difference in drive order from when we used the virtio
interface.
Before when we added disks the order of the drives were set by which order
the disks was created.
So if i had 1 disk as os disk it became vda and added a 50 GB disk that
disk became vdb and then added another 8GB disk that became vdc.
But now when i add two additional disks with the virtio-scsi interface like
the above when i reboot the vm the 50GB disk become sdc and the 8GB disk
become sdb even that i created the 50GB disk first?
How is the order decided in the virtio-scsi interface?
What can i do to ensure that the disks come in the order that i create them?
Regards
Christian
Could you post the XML (virsh -r list, note the domain
number and virsh -r dumpxml $domainnumber) before and after adding the
disks? Need to see whether there are also any iothreads or anything
else.
Thanks,
mpolednik
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Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
12:12 p.m.
On Thu, Mar 16, 2017 at 11:56 AM, Martin Polednik <mpolednik(a)redhat.com>
wrote:
On 16/03/17 08:23 +0100, gflwqs gflwqs wrote:
> Hi list!
> When we upgraded our ovirt environment to 4.1 we get the virtio-scsi
> interface as default for virtual disks.
> We have seen a difference in drive order from when we used the virtio
> interface.
>
> Before when we added disks the order of the drives were set by which order
> the disks was created.
> So if i had 1 disk as os disk it became vda and added a 50 GB disk that
> disk became vdb and then added another 8GB disk that became vdc.
>
> But now when i add two additional disks with the virtio-scsi interface
> like
> the above when i reboot the vm the 50GB disk become sdc and the 8GB disk
> become sdb even that i created the 50GB disk first?
> How is the order decided in the virtio-scsi interface?
> What can i do to ensure that the disks come in the order that i create
> them?
>
> Regards
> Christian
>
Could you post the XML (virsh -r list, note the domain
number and virsh -r dumpxml $domainnumber) before and after adding the
disks? Need to see whether there are also any iothreads or anything
else.
It doesn't matter - the order of disk discovery on the SCSI bus (by udev?)
is quite random.
You must use /dev/disk/by-id/scsi-...
Y.
Thanks,
mpolednik
_______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
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http://lists.ovirt.org/mailman/listinfo/users
9:02 p.m.
--Apple-Mail=_9E038410-3C50-4055-B967-7FE43616EA54
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=utf-8
On 16 Mar 2017, at 11:12, Yaniv Kaul <ykaul(a)redhat.com> wrote:
=20
=20
=20
On Thu, Mar 16, 2017 at 11:56 AM, Martin Polednik =
<mpolednik(a)redhat.com
<mailto:mpolednik@redhat.com>> wrote:
On 16/03/17 08:23 +0100, gflwqs gflwqs wrote:
Hi list!
When we upgraded our ovirt environment to 4.1 we get the virtio-scsi
interface as default for virtual disks.
We have seen a difference in drive order from when we used the virtio
interface.
=20
Before when we added disks the order of the drives were set by which =
order
the disks was created.
So if i had 1 disk as os disk it became vda and added a 50 GB disk =
that
disk became vdb and then added another 8GB disk that became vdc.
=20
But now when i add two additional disks with the virtio-scsi interface =
like
the above when i reboot the vm the 50GB disk become sdc and the 8GB =
disk
become sdb even that i created the 50GB disk first?
How is the order decided in the virtio-scsi interface?
What can i do to ensure that the disks come in the order that i create =
them?
=20
Regards
Christian
=20
Could you post the XML (virsh -r list, note the domain
number and virsh -r dumpxml $domainnumber) before and after adding the
disks? Need to see whether there are also any iothreads or anything
else.
=20
It doesn't matter - the order of disk discovery on the SCSI bus (by =
udev?) is
quite random.
You must use /dev/disk/by-id/scsi-=E2=80=A6
well, it may in case we are actually doing something wrong with =
controllers or iothreads due to recent changes in that area.
=20
Y.
=20
=20
Thanks,
mpolednik
=20
=20
_______________________________________________
Users mailing list
Users(a)ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users =
<http://lists.ovirt.org/mailman/listinfo/users>
=20
_______________________________________________
Users mailing list
Users(a)ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users =
<http://lists.ovirt.org/mailman/listinfo/users>
=20
_______________________________________________
Users mailing list
Users(a)ovirt.org <mailto:Users@ovirt.org>
http://lists.ovirt.org/mailman/listinfo/users =
<http://lists.ovirt.org/mailman/listinfo/users>
--Apple-Mail=_9E038410-3C50-4055-B967-7FE43616EA54
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
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<html><head><meta http-equiv=3D"Content-Type"
content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><br class=3D""><div><blockquote
type=3D"cite" class=3D""><div =
class=3D"">On 16 Mar 2017, at 11:12, Yaniv Kaul <<a =
href=3D"mailto:ykaul@redhat.com"
class=3D"">ykaul(a)redhat.com</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div
class=3D""><div =
dir=3D"ltr" style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><div
=
class=3D"gmail_extra"><br
class=3D"Apple-interchange-newline"><br =
class=3D""><div class=3D"gmail_quote">On Thu, Mar 16, 2017 at
11:56 AM, =
Martin Polednik<span
class=3D"Apple-converted-space"> </span><span =
dir=3D"ltr" class=3D""><<a
href=3D"mailto:mpolednik@redhat.com" =
target=3D"_blank"
class=3D"">mpolednik(a)redhat.com</a>&gt;</span><span =
class=3D"Apple-converted-space"> </span>wrote:<br =
class=3D""><blockquote class=3D"gmail_quote"
style=3D"margin: 0px 0px =
0px 0.8ex; border-left-width: 1px; border-left-style: solid; =
border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div =
class=3D"gmail-HOEnZb"><div class=3D"gmail-h5">On 16/03/17
08:23 +0100, =
gflwqs gflwqs wrote:<br class=3D""><blockquote
class=3D"gmail_quote" =
style=3D"margin: 0px 0px 0px 0.8ex; border-left-width: 1px; =
border-left-style: solid; border-left-color: rgb(204, 204, 204); =
padding-left: 1ex;">Hi list!<br class=3D"">When we upgraded our
ovirt =
environment to 4.1 we get the virtio-scsi<br class=3D"">interface as =
default for virtual disks.<br class=3D"">We have seen a difference in =
drive order from when we used the virtio<br class=3D"">interface.<br =
class=3D""><br class=3D"">Before when we added disks the
order of the =
drives were set by which order<br class=3D"">the disks was created.<br
=
class=3D"">So if i had 1 disk as os disk it became vda and added a 50 GB =
disk that<br class=3D"">disk became vdb and then added another 8GB disk =
that became vdc.<br class=3D""><br class=3D"">But now when
i add two =
additional disks with the virtio-scsi interface like<br class=3D"">the =
above when i reboot the vm the 50GB disk become sdc and the 8GB disk<br =
class=3D"">become sdb even that i created the 50GB disk first?<br =
class=3D"">How is the order decided in the virtio-scsi interface?<br =
class=3D"">What can i do to ensure that the disks come in the order that =
i create them?<br class=3D""><br class=3D"">Regards<br
=
class=3D"">Christian<br class=3D""></blockquote><br
=
class=3D""></div></div>Could you post the XML (virsh -r list,
note the =
domain<br class=3D"">number and virsh -r dumpxml $domainnumber) before =
and after adding the<br class=3D"">disks? Need to see whether there are =
also any iothreads or anything<br class=3D"">else.<br =
class=3D""></blockquote><div class=3D""><br
class=3D""></div><div =
class=3D"">It doesn't matter - the order of disk discovery on the SCSI =
bus (by udev?) is quite random.</div><div class=3D"">You must use =
/dev/disk/by-id/scsi-=E2=80=A6</div></div></div></div></div></blockquote><=
div><br class=3D""></div>well, it may in case we are actually
doing =
something wrong with controllers or iothreads due to recent changes in =
that area.</div><div><br class=3D""><blockquote
type=3D"cite" =
class=3D""><div class=3D""><div dir=3D"ltr"
style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><div class=3D"gmail_extra"><div =
class=3D"gmail_quote"><div class=3D""><br
class=3D""></div><div =
class=3D"">Y.</div><div
class=3D""> </div><blockquote =
class=3D"gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; =
border-left-width: 1px; border-left-style: solid; border-left-color: =
rgb(204, 204, 204); padding-left: 1ex;"><br
class=3D"">Thanks,<br =
class=3D"">mpolednik<div class=3D"gmail-HOEnZb"><div =
class=3D"gmail-h5"><br class=3D""><br
class=3D""><blockquote =
class=3D"gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; =
border-left-width: 1px; border-left-style: solid; border-left-color: =
rgb(204, 204, 204); padding-left: =
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rel=3D"noreferrer" =
target=3D"_blank" class=3D"">http://lists.ovirt.org/mailman<wbr
=
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class=3D"">_________________<br class=3D"">Users mailing
list<br =
class=3D""><a href=3D"mailto:Users@ovirt.org"
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4 comments
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participants (4)
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gflwqs gflwqs -
Martin Polednik -
Michal Skrivanek -
Yaniv Kaul