Proxmox HA OS and hdd sata

Hi everyone,
I installed HA OS without any problems on a Proxmox VM, I added a second 4TB disk to the VM and I want to mount it in the “/mnt/data/supervisor/media/FOTO_e_VIDEO” folder.
No problem if I mount it manually from the virtual console of the VM on Proxmox with the command
mount /dev/sdb1 /mnt/data/supervisor/media/FOTO_e_VIDEO.
If I try to mount it from the internal terminal or ssh it doesn’t let me do it because it doesn’t recognize the mount command.
Now, I can mount it manually ok, but how can I mount it automatically at startup?
FSTAB is not possible, with UDEV is it possible?
The disk is formatted in EXT4.
I tried but I couldn’t.
Thanks everyone!

is there anyone who can help me?

Your setup is not entirely clear to me.

Where did you succeed to mount the disk? As I understand it, under the proxmox base system, why is fstab not possible?

I am not sure, but I think that under proxmox you can do this under “Directory” of the node menu.

However, you can not add the native disk as a directory mount to the VM.

Possbily you dan add it as a device - I can see disks under Add / PCI Device

Another approach would be to mount the device on your native proxmox system and share the disk from there.

Or mount the device in a container, install some NAS software to propose it as a network mount.
For a container you have different options which I think make it easier to provide access to just a directory/something already mounted on the base sytem. A “Device Passthrough” might also work.

Personnally I would go with a container acting as a NAS as that provides more flexibility IMHO.

HAOS is installed in a Proxmox VM not in a container so I can’t use LXC mountpoints.
I finally followed your advice and shared directly from Proxmox with NFS the disks I wanted to see on HAOS, then on HAOS I loaded them as network storage and everything works fine.
Thanks!

Yes, HAOS is in a VM of course, but I meant installing some NAS SW in a container.

I can think of freenas, truenas, openmediavault.

Apparently you could install “Cockpit” on the base system (Making Proxmox into a pretty good NAS :: apalrd's adventures).

The important thing is that you have a solution!