Hi, since we have updated to 4.3.7 and another cluster to 4.3.8 snapshots are not longer possible. In previous version all went well... ° libGfApi enabled ° gluster 6.7.1 on gluster-server and client ° libvirt-4.5.0-23.el7_7.3 vdsm on a given node says: jsonrpc/2) [vds] prepared volume path: gluvol3/e54d835a-d8a5-44ae-8e17-fcba1c54e46f/images/1f43916a-bbf2-447b-b17d-ba22d4ec8c90/0e56d498-11d2-4f35-b781-a2e06d286eb8 (clientIF:510) (jsonrpc/2) [virt.vm] (vmId='acdc31b5-082b-4a68-b586-02354a7fdd73') <?xml version='1.0' encoding='utf-8'?> <domainsnapshot><disks><disk name="sda" snapshot="external" type="network"><source name="gluvol3/e54d835a-d8a5-44ae-8e17-fcba1c54e46f/images/1f43916a-bbf2-447b-b17d-ba22d4ec8c90/0e56d498-11d2-4f35-b781-a2e06d286eb8" protocol="gluster" type="network"><host name="192.168.1 1.20" port="0" transport="tcp" /></source></disk></disks></domainsnapshot> (vm:4497) (jsonrpc/2) [virt.vm] (vmId='acdc31b5-082b-4a68-b586-02354a7fdd73') Disabling drive monitoring (drivemonitor:60) (jsonrpc/2) [virt.vm] (vmId='acdc31b5-082b-4a68-b586-02354a7fdd73') Freezing guest filesystems (vm:4268) WARN (jsonrpc/2) [virt.vm] (vmId='acdc31b5-082b-4a68-b586-02354a7fdd73') Unable to freeze guest filesystems: Guest agent is not responding: QEMU guest agent is not connected (vm:4273) INFO (jsonrpc/2) [virt.vm] (vmId='acdc31b5-082b-4a68-b586-02354a7fdd73') Taking a live snapshot (drives=sda, memory=True) (vm:4513) ... ... ERROR (jsonrpc/2) [virt.vm] (vmId='acdc31b5-082b-4a68-b586-02354a7fdd73') Unable to take snapshot (vm:4517) Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/vdsm/virt/vm.py", line 4514, in snapshot self._dom.snapshotCreateXML(snapxml, snapFlags) File "/usr/lib/python2.7/site-packages/vdsm/virt/virdomain.py", line 100, in f ret = attr(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/common/libvirtconnection.py", line 131, in wrapper ret = f(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/common/function.py", line 94, in wrapper return func(inst, *args, **kwargs) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 2620, in snapshotCreateXML if ret is None:raise libvirtError('virDomainSnapshotCreateXML() failed', dom=self) libvirtError: internal error: unable to execute QEMU command 'transaction': Could not read L1 table: Input/output error ... INFO (jsonrpc/2) [jsonrpc.JsonRpcServer] RPC call VM.snapshot failed (error 48) in 4.65 seconds (__init__:312) It seems that the origin is libvirt or qemu. Regards Chris