From OpenMediaVault to proxmox server

You've received excellent advice & pointers from Dunuin, I just would like to add I believe the extra overhead of ZFS on your limited resources (RAM + 4 cores no HT, low-level CPU), may not be the way to go. I don't have any ZFS experience on something of your scale - maybe someone correct my assessment on a tried similar scenario.
 
So I made my first Proxmox installation last night, I had some problems that I solved myself, however, I have some new questions :) Thanks again for your good advices that certainly avoid some errors during Proxmox configuration. Asyou said just above, I have choose ZFS file system because of my low power server.

1- First, I create an OMV VM which is working fine, however, I have the follwing error when installing Proxmox :
portainer.PNG

I search on Google but I didn't find why I have this error.

2- Then, I partitioned the 1To SSD Disk with :
  • Partition 1 : Proxmox OS
  • Partition 2 : Proxmox Data
  • Partition 3 : Specific partition formated with ext4 file system
disk.PNG
However, I haven't find how to see the Partition 3 under OMV system, and I am wondering if I can access to this partition with several VMs and containers. On my previsous OMV configuration, this partition where used for personal data as Nextcloud Data, Download folder for JDownloader, and were also accessible with SMB Share. I would love to do the same under Proxmox, but I am not sure if it is possible.

3- I have all my HDD with ext4 file system (10 To, 4 To and 2 To) and a lot on data on them, can I just add them to Proxmox without loosing data, or is it mandatory to format them in a new file system and then restore data ?

Thanks for your help ! :)
 
You've received excellent advice & pointers from Dunuin, I just would like to add I believe the extra overhead of ZFS on your limited resources (RAM + 4 cores no HT, low-level CPU), may not be the way to go. I don't have any ZFS experience on something of your scale - maybe someone correct my assessment on a tried similar scenario.
Yes, here its pretty terrible on a J3710 quadcore Atom with 16GB RAM and a mirror of Enterprise SATA SSDs. Have lots of IO like doing a backup to PBS and the whole system will struggle at 100% CPU utilization.The small RAM isn't helping either. Replaced it with a quadcore Xeon E3 and 32GB RAM.
  • Partition 1 : Proxmox OS
  • Partition 2 : Proxmox Data
Partition 1+2 are for the bootloaders.
Partition 3 is your LVM with PVE root filesystem +"local" + "local-lvm" storage

However, I haven't find how to see the Partition 3 under OMV system, and I am wondering if I can access to this partition with several VMs and containers.
For containers you could work with bind-mounts. For VMs you would need to turn your PVE into a NAS yourself via CLI, as PVE doesn't come with any NAS functionalities, so no SMB shares that would allow you to access data on the PVE disk in VMs or from other computers.

3- I have all my HDD with ext4 file system (10 To, 4 To and 2 To) and a lot on data on them, can I just add them to Proxmox without loosing data, or is it mandatory to format them in a n
You would have to manually mount them via CLI (fstab/systemd/autofs) and then add a Directory storage to PVE pointing to its mountpoint.

You probably see now why I told you, you won't have much fun with PVE, if you don't like to work with the CLI ;)
 
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