libvirt<br>version: 3.4.0<br>architecture: x86_64 ubuntu16.04-server<br>hypervisor: kvm,qemu<br><br>when I want make a memery snapshot for a vm ,and I call virsh save ,but tell me this error:<br>error: Failed to save domain 177 to /datapool/mm.img<br>error: operation failed: domain save job: unexpectedly failed<br><br>xml configure:<br><domain type='kvm' id='177'><br>  <name>virt23</name><br>  <uuid>e50c1d59-c4a3-4413-b6c9-20e90cced343</uuid><br>  <metadata/><br>  <memory unit='KiB'>10485760</memory><br>  <currentMemory unit='KiB'>10485760</currentMemory><br>  <vcpu placement='static'>1</vcpu><br>  <resource><br>    <partition>/machine</partition><br>  </resource><br>  <os><br>    <type arch='x86_64' machine='pc-i440fx-2.5'>hvm</type><br>    <boot dev='hd'/><br>  </os><br>  <clock offset='utc'/><br>  <on_poweroff>destroy</on_poweroff><br>  <on_reboot>restart</on_reboot><br>  <on_crash>destroy</on_crash><br>  <devices><br>    <emulator>/usr/bin/kvm</emulator><br>    <disk type='file' device='disk'><br>      <driver name='qemu' type='raw'/><br>      <source file='/datapool/zhuohf/virt23.qcow2'/><br>      <backingStore/><br>      <target dev='vdc' bus='virtio'/><br>      <alias name='virtio-disk2'/><br>      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/><br>    </disk><br>    <disk type='file' device='cdrom'><br>      <driver name='qemu' type='raw'/><br><source file='/datapool/zhuohf/ubuntu-16.04.2-desktop-amd64.iso'/>      [40/38156]<br>      <backingStore/><br>      <target dev='hdc' bus='ide'/><br>      <readonly/><br>      <alias name='ide0-1-0'/><br>      <address type='drive' controller='0' bus='1' target='0' unit='0'/><br>    </disk><br>    <controller type='usb' index='0' model='piix3-uhci'><br>      <alias name='usb'/><br>      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/><br>    </controller><br>    <controller type='pci' index='0' model='pci-root'><br>      <alias name='pci.0'/><br>    </controller><br>    <controller type='ide' index='0'><br>      <alias name='ide'/><br>      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/><br>    </controller><br>    <interface type='network'><br>      <mac address='52:54:00:e0:31:68'/><br>      <source network='default' bridge='virbr0'/><br>      <target dev='vnet11'/><br>      <model type='rtl8139'/><br>      <alias name='net0'/><br>      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/><br>    </interface><br>    <input type='mouse' bus='ps2'><br>      <alias name='input0'/><br>    </input><br>    <input type='keyboard' bus='ps2'><br>      <alias name='input1'/><br></input><br>    <graphics type='vnc' port='5909' autoport='yes' listen='0.0.0.0'><br>      <listen type='address' address='0.0.0.0'/><br>    </graphics><br>    <video><br>      <model type='cirrus' vram='16384' heads='1' primary='yes'/><br>      <alias name='video0'/><br>      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/><br>    </video><br>    <memballoon model='virtio'><br>      <stats period='1'/><br>      <alias name='balloon0'/><br>      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/><br>    </memballoon><br>  </devices><br>  <seclabel type='none' model='none'/><br>  <seclabel type='dynamic' model='dac' relabel='yes'><br>    <label>+0:+0</label><br>    <imagelabel>+0:+0</imagelabel><br>  </seclabel><br></domain><br><br>before I encounter the same error,that time is my disk not free spaceŁ¬but this time I can't find error reason.<br><br>Thanks<br><br><br>