<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 16 Mar 2017, at 11:12, Yaniv Kaul <<a href="mailto:ykaul@redhat.com" class="">ykaul@redhat.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" style="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=""><div class="gmail_extra"><br class="Apple-interchange-newline"><br class=""><div class="gmail_quote">On Thu, Mar 16, 2017 at 11:56 AM, Martin Polednik<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:mpolednik@redhat.com" target="_blank" class="">mpolednik@redhat.com</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="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="gmail-HOEnZb"><div class="gmail-h5">On 16/03/17 08:23 +0100, gflwqs gflwqs wrote:<br class=""><blockquote class="gmail_quote" style="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="">When we upgraded our ovirt environment to 4.1 we get the virtio-scsi<br class="">interface as default for virtual disks.<br class="">We have seen a difference in drive order from when we used the virtio<br class="">interface.<br class=""><br class="">Before when we added disks the order of the drives were set by which order<br class="">the disks was created.<br class="">So if i had 1 disk as os disk it became vda and added a 50 GB disk that<br class="">disk became vdb and then added another 8GB disk that became vdc.<br class=""><br class="">But now when i add two additional disks with the virtio-scsi interface like<br class="">the above when i reboot the vm the 50GB disk become sdc and the 8GB disk<br class="">become sdb even that i created the 50GB disk first?<br class="">How is the order decided in the virtio-scsi interface?<br class="">What can i do to ensure that the disks come in the order that i create them?<br class=""><br class="">Regards<br class="">Christian<br class=""></blockquote><br class=""></div></div>Could you post the XML (virsh -r list, note the domain<br class="">number and virsh -r dumpxml $domainnumber) before and after adding the<br class="">disks? Need to see whether there are also any iothreads or anything<br class="">else.<br class=""></blockquote><div class=""><br class=""></div><div class="">It doesn't matter - the order of disk discovery on the SCSI bus (by udev?) is quite random.</div><div class="">You must use /dev/disk/by-id/scsi-…</div></div></div></div></div></blockquote><div><br class=""></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=""><blockquote type="cite" class=""><div class=""><div dir="ltr" style="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=""><div class="gmail_extra"><div class="gmail_quote"><div class=""><br class=""></div><div class="">Y.</div><div class=""> </div><blockquote class="gmail_quote" style="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="">Thanks,<br class="">mpolednik<div class="gmail-HOEnZb"><div class="gmail-h5"><br class=""><br class=""><blockquote class="gmail_quote" style="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="">_________________<br class="">Users mailing list<br class=""><a href="mailto:Users@ovirt.org" target="_blank" class="">Users@ovirt.org</a><br class=""><a href="http://lists.ovirt.org/mailman/listinfo/users" rel="noreferrer" target="_blank" class="">http://lists.ovirt.org/mailman<wbr class="">/listinfo/users</a><br class=""></blockquote><br class="">______________________________<wbr class="">_________________<br class="">Users mailing list<br class=""><a href="mailto:Users@ovirt.org" target="_blank" class="">Users@ovirt.org</a><br class=""><a href="http://lists.ovirt.org/mailman/listinfo/users" rel="noreferrer" target="_blank" class="">http://lists.ovirt.org/mailman<wbr class="">/listinfo/users</a><br class=""></div></div></blockquote></div><br class=""></div></div><span style="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; float: none; display: inline !important;" class="">_______________________________________________</span><br style="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=""><span style="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; float: none; display: inline !important;" class="">Users mailing list</span><br style="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=""><a href="mailto:Users@ovirt.org" style="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-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">Users@ovirt.org</a><br style="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=""><a href="http://lists.ovirt.org/mailman/listinfo/users" style="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-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">http://lists.ovirt.org/mailman/listinfo/users</a></div></blockquote></div><br class=""></body></html>