From 8266bc59db4d9808cb2c719ab08d361b29b9d2aa Mon Sep 17 00:00:00 2001
From: Thomas Lamprecht <t.lamprecht@proxmox.com>
Date: Wed, 23 Oct 2019 09:31:51 +0200
Subject: [PATCH] Revert "fix #1071: VMs with IOThread enabled disks can now be
 backed up"

This reverts commit 6b4b369fe35eb43ac08cf5609b488088c537926d.
---
 PVE/VZDump/QemuServer.pm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/PVE/VZDump/QemuServer.pm b/PVE/VZDump/QemuServer.pm
index a9184290..b8d8fa9b 100644
--- a/PVE/VZDump/QemuServer.pm
+++ b/PVE/VZDump/QemuServer.pm
@@ -73,6 +73,8 @@ sub prepare {
 	if (defined($drive->{backup}) && !$drive->{backup}) {
 	    $self->loginfo("exclude disk '$ds' '$volid' (backup=no)");
 	    return;
+	} elsif ($drive->{iothread}) {
+	    die "disk '$ds' '$volid' (iothread=on) can't use backup feature currently. Please set backup=no for this drive";
 	} else {
 	    my $log = "include disk '$ds' '$volid'";
 	   if (defined $drive->{size}) {