I verified that Ceph was mapped to the Virtualizor server with the following command:
```
[root@localhost ~]# rbd showmapped
id pool image snap device
0 azlab phuongluu - /dev/rbd0
```
I also checked the /dev/rbd/ directory and confirmed that Ceph is displayed here. However, when I add this path to Virtualizor, I receive the following error:
```
Server ID: 0. Error: The Ceph pool doesn't exist.
```
Please help me check if I missed any steps. Thank you.