On 16 Mar 2017, at 11:12, Yaniv Kaul <ykaul@redhat.com> wrote: =20 =20 =20 On Thu, Mar 16, 2017 at 11:56 AM, Martin Polednik = <mpolednik@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 =
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 =
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 =
--Apple-Mail=_9E038410-3C50-4055-B967-7FE43616EA54 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 that like 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@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@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@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; charset=utf-8 <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@redhat.com</a>> = 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@redhat.com</a>></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: = 1ex;">______________________________<wbr class=3D"">_________________<br = class=3D"">Users mailing list<br class=3D""><a = href=3D"mailto:Users@ovirt.org" target=3D"_blank" = class=3D"">Users@ovirt.org</a><br class=3D""><a = href=3D"http://lists.ovirt.org/mailman/listinfo/users" rel=3D"noreferrer" = target=3D"_blank" class=3D"">http://lists.ovirt.org/mailman<wbr = class=3D"">/listinfo/users</a><br class=3D""></blockquote><br = class=3D"">______________________________<wbr = class=3D"">_________________<br class=3D"">Users mailing list<br = class=3D""><a href=3D"mailto:Users@ovirt.org" target=3D"_blank" = class=3D"">Users@ovirt.org</a><br class=3D""><a = href=3D"http://lists.ovirt.org/mailman/listinfo/users" rel=3D"noreferrer" = target=3D"_blank" class=3D"">http://lists.ovirt.org/mailman<wbr = class=3D"">/listinfo/users</a><br = class=3D""></div></div></blockquote></div><br class=3D""></div></div><span= style=3D"font-family: Helvetica; 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