diff --git a/debian/control b/debian/control
index 42d3e1a5fab..b444cfa4f44 100644
--- a/debian/control
+++ b/debian/control
@@ -22,7 +22,7 @@ Description: CloudStack server library
 
 Package: cloudstack-agent
 Architecture: all
-Depends: ${python:Depends}, openjdk-8-jre-headless | java8-runtime-headless | java8-runtime, cloudstack-common (= ${source:Version}), lsb-base (>= 4.0), libcommons-daemon-java, openssh-client, qemu-kvm (>= 1.0), libvirt-bin (>= 1.2.2), uuid-runtime, iproute, ebtables, vlan, jsvc, ipset, python-libvirt, ethtool, iptables, lsb-release, init-system-helpers (>= 1.14~), aria2
+Depends: ${python:Depends}, openjdk-8-jre-headless | java8-runtime-headless | java8-runtime, cloudstack-common (= ${source:Version}), lsb-base (>= 4.0), libcommons-daemon-java, openssh-client, qemu-kvm (>= 1.0), libvirt-bin (>= 1.2.2), uuid-runtime, iproute2, ebtables, vlan, jsvc, ipset, python-libvirt, ethtool, iptables, lsb-release, init-system-helpers (>= 1.14~), aria2
 Recommends: init-system-helpers
 Conflicts: cloud-agent, cloud-agent-libs, cloud-agent-deps, cloud-agent-scripts
 Description: CloudStack agent
diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtDomainXMLParser.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtDomainXMLParser.java
index 5f2af5cbe72..2eeff88e081 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtDomainXMLParser.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtDomainXMLParser.java
@@ -121,7 +121,7 @@ public class LibvirtDomainXMLParser {
                         def.defBlockBasedDisk(diskDev, diskLabel,
                             DiskDef.DiskBus.valueOf(bus.toUpperCase()));
                     }
-                    if (diskCacheMode != null) {
+                    if (StringUtils.isNotBlank(diskCacheMode)) {
                         def.setCacheMode(DiskDef.DiskCacheMode.valueOf(diskCacheMode.toUpperCase()));
                     }
                 }
diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtVMDef.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtVMDef.java
index 7c12c0713c5..08ece9a104e 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtVMDef.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtVMDef.java
@@ -819,8 +819,12 @@ public class LibvirtVMDef {
             diskBuilder.append(" type='" + _diskType + "'");
             diskBuilder.append(">\n");
             if(qemuDriver) {
-                diskBuilder.append("<driver name='qemu'" + " type='" + _diskFmtType
-                        + "' cache='" + _diskCacheMode + "' ");
+                diskBuilder.append("<driver name='qemu'" + " type='" + _diskFmtType + "' ");
+
+                if (_deviceType != DeviceType.CDROM) {
+                    diskBuilder.append("cache='" + _diskCacheMode + "' ");
+                }
+
                 if(_discard != null && _discard != DiscardType.IGNORE) {
                     diskBuilder.append("discard='" + _discard.toString() + "' ");
                 }
diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtStopCommandWrapper.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtStopCommandWrapper.java
index bb837b56a24..7a0375f2512 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtStopCommandWrapper.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/wrapper/LibvirtStopCommandWrapper.java
@@ -71,7 +71,7 @@ public final class LibvirtStopCommandWrapper extends CommandWrapper<StopCommand,
                 //move the command line file to backup.
                 s_logger.debug("backing up the cmdline");
                 try{
-                    Pair<Boolean, String> ret = SshHelper.sshExecute(command.getControlIp(), 3922, "root", pemFile, null,"mv -f "+CMDLINE_PATH+" "+CMDLINE_BACKUP_PATH);
+                    Pair<Boolean, String> ret = SshHelper.sshExecute(command.getControlIp(), 3922, "root", pemFile, null,"cp -f "+CMDLINE_PATH+" "+CMDLINE_BACKUP_PATH);
                     if(!ret.first()){
                         s_logger.debug("Failed to backup cmdline file due to "+ret.second());
                     }
diff --git a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/LibvirtStorageAdaptor.java b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/LibvirtStorageAdaptor.java
index 63f7872d05e..d85b7c16aef 100644
--- a/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/LibvirtStorageAdaptor.java
+++ b/plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/LibvirtStorageAdaptor.java
@@ -525,6 +525,7 @@ public class LibvirtStorageAdaptor implements StorageAdaptor {
                     if (pdef == null) {
                         throw new CloudRuntimeException("Unable to parse the storage pool definition for storage pool " + poolname);
                     }
+
                     String targetPath = pdef.getTargetPath();
                     if (targetPath != null && targetPath.equals(path)) {
                         s_logger.debug("Storage pool utilizing path '" + path + "' already exists as pool " + poolname +
@@ -663,7 +664,7 @@ public class LibvirtStorageAdaptor implements StorageAdaptor {
 
         switch (pool.getType()) {
             case RBD:
-                return createPhysicalDiskByLibVirt(name, pool, format, provisioningType, size);
+                return createPhysicalDiskByLibVirt(name, pool, PhysicalDiskFormat.RAW, provisioningType, size);
             case NetworkFilesystem:
             case Filesystem:
                 switch (format) {
diff --git a/ui/scripts/system.js b/ui/scripts/system.js
index 050c5ebc4b5..558c408e437 100755
--- a/ui/scripts/system.js
+++ b/ui/scripts/system.js
@@ -17481,6 +17481,10 @@
                                                 item.powerstate = item.outofbandmanagement.powerstate;
                                             }
 
+                                            if (!item.hypervisorversion && item.details && item.details["Host.OS"]) {
+                                                item.hypervisorversion =  item.details["Host.OS"] + " " +  item.details["Host.OS.Version"];
+                                            }
+
                                             if (item && item.hostha) {
                                                 item.hastate = item.hostha.hastate;
                                                 item.haprovider = item.hostha.haprovider;