GitHub user mwaag added a comment to the discussion: VMWare to KVM Migration 
fails - "nbdcopy command failed"

That was way too easy. Thanks!
Got me a step further, but ran into an new error:

The import process failed for instance i-4-57-VM from VMware to KVM on host 
b-kvm-test-001: Error converting instance i-4-57-VM from VMware, due to: 
org.libvirt.LibvirtException: cannot unlink file 
'/mnt/712cdae3-3474-3a73-985a-5165c940db32/df60ddc6-ffe1-4f53-8a6d-685f5c39f9b6-sda':
 Permission denied

According to agent.log the v2v-conversion was successful now.

This is the secondary storage for that kvm-zone.
Here's a listing that directory:
```
root@b-kvm-test-001:~# ls -lah /mnt/712cdae3-3474-3a73-985a-5165c940db32/
total 5.1G
drwxrwxrwt  5 nobody nogroup 4.0K May  9 19:33 .
drwxr-xr-x 12 root   root    4.0K May  9 08:18 ..
-rw-r--r--  1 nobody nogroup 193K May  8 12:28 
18a02d3a-430a-4688-b9f3-b20222e67e33-sda
-rw-r--r--  1 nobody nogroup 193K May  9 13:21 
20406168-eef9-416d-baa6-2cb029febf31-sda
-rw-r--r--  1 nobody nogroup 193K May  9 08:29 
3a5ed540-1c2c-4620-bc00-2824462380aa-sda
-rw-r--r--  1 nobody nogroup 193K May  8 15:59 
d4ebfae1-9fca-41d8-9932-e789abfe2d52-sda
-rw-r--r--  1 nobody nogroup 5.1G May  9 19:33 
df60ddc6-ffe1-4f53-8a6d-685f5c39f9b6-sda
-rw-r--r--  1 nobody nogroup 1.8K May  9 19:33 
df60ddc6-ffe1-4f53-8a6d-685f5c39f9b6.xml
-rw-r--r--  1 nobody nogroup 193K May  8 15:32 
e8b11c7a-9387-4f5a-990a-cb1e486320c8-sda
drwxrwxrwx  2 nobody nogroup 4.0K May  4 14:56 snapshots
drwxr-xr-x  3 nobody nogroup 4.0K Apr 30 15:18 template
drwxrwxrwx  2 nobody nogroup 4.0K May  4 14:56 volumes
```

Why is it mounted with nobody:nogroup? Can i influence that?
My primary storage is mounted that way too! But i already have several vms 
running in that zone (1x user-vm + some system-vms).

```
root@b-kvm-test-001:~# virsh list
 Id   Name         State
----------------------------
 8    i-4-134-VM   running
 11   s-144-VM     running
 12   v-145-VM     running
 14   r-146-VM     running
```

```
root@b-kvm-test-001:~# mount
[...]
192.168.2.4:/bi_nfs_testenv_cloudstack0_pri_kvm on 
/mnt/e336c1bb-917c-30ca-82df-7b118b5fda18 type nfs4 
(rw,nosuid,nodev,noexec,relatime,vers=4.0,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.2.50,local_lock=none,addr=192.168.2.4)
192.168.2.4:/bi_nfs_testenv_cloudstack0_sec_2 on 
/mnt/712cdae3-3474-3a73-985a-5165c940db32 type nfs4 
(rw,nosuid,nodev,noexec,relatime,vers=4.0,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.2.50,local_lock=none,addr=192.168.2.4)
```

```
root@b-kvm-test-001:~# ls -lah /mnt/e336c1bb-917c-30ca-82df-7b118b5fda18
total 13G
drwxr-xr-x  3 nobody nogroup 4.0K May  9 19:33 .
drwxr-xr-x 12 root   root    4.0K May  9 08:18 ..
-rw-r--r--  1 nobody nogroup 5.1G May  9 19:33 
98d0b8fc-339b-4f75-b5d5-dfbfb3e49620
-rw-r--r--  1 nobody nogroup 3.8G May  7 13:54 
d34deb50-025e-4256-9d83-aa429bb934a4
-rw-r--r--  1 nobody nogroup  37M May  9 19:36 
de80f546-58d1-46ff-bc8e-11beb9327681
-rw-r--r--  1 nobody nogroup 3.8G May  7 13:45 
e5481393-5080-476f-8df9-11004a66aace
drwxr-xr-x  2 nobody nogroup 4.0K May  6 15:44 KVMHA
```

These aren't manual mounts. They were mounted at zone-creation i think?

GitHub link: 
https://github.com/apache/cloudstack/discussions/10841#discussioncomment-13095007

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