Hello,

it happened two times, always with VMs composed by more than 1 disk.

Now I have a VM with 9 disks and a total of about 370Gb:

1 x 90Gb

5 x 50Gb

3 x 10Gb 

I export vm to an export domain and it started 2 hours and 10 minutes ago at 15:46.

At beginning the write rate on export domain was 120MB/s (in line with I/O capabilities of storage subsystem).

It seems 5 disks completed ok, while 4 don't complete, even if it seems to be some reading activity:

with command

iotop -d 3 -k -o -P 

I get this on hypervisor where qemu-img convert command is executing

Total DISK READ :    5712.75 K/s | Total DISK WRITE :     746.58 K/s

Actual DISK READ:    6537.11 K/s | Actual DISK WRITE:       6.89 K/s

  PID  PRIO  USER    DISK READ>  DISK WRITE  SWAPIN      IO    COMMAND                                            

21238 idle vdsm     1344.18 K/s  183.12 K/s  0.00 %  0.15 % qemu-img convert -p -t non~1d23-4829-8350-f81fa16ea8b0

21454 idle vdsm     1344.18 K/s  183.12 K/s  0.00 %  0.06 % qemu-img convert -p -t non~443d-4563-8879-3dbd711b6936

21455 idle vdsm     1344.18 K/s  189.68 K/s  0.00 %  0.08 % qemu-img convert -p -t non~b67d-4acd-9bb5-485bc3ffdf2e

21548 idle vdsm     1344.18 K/s  190.67 K/s  0.00 %  0.06 % qemu-img convert -p -t non~7fc