backup drives

[positech3]

I have a system where we came up short some space. Proxmox 7.0-8
I have 6x 800GB drives RAID Mirror which the VM has pretty much filled up but is ok for the VM just causes Proxmox issues.
I would like to add 2x 1TB drives to allow proxmox to have space for updates and gives me a place to create a backup for the VM.
Can and how could I take these two drives and make them one volume/partition where I have 2TB or so to do backups and give proxmox some working space.
thank you in advance

 

[Dunuin]

HW raid, ZFS stripe (but loose 20% of space), LVM stripe or mdadm raid0 all would work. I think only ZFS can be done using the WebUI. But keep in mind that striping both disks will half the reliability because if any one of the two disks got a problem the whole data will be lost.

 

[positech3]

HW raid, ZFS stripe (but loose 20% of space), LVM stripe or mdadm raid0 all would work. I think only ZFS can be done using the WebUI. But keep in mind that striping both disks will half the reliability because if any one of the two disks got a problem the whole data will be lost.

I had this as ZFS but could not get it to show up as an option for backup storage.
where am I missing that?

 

[Dunuin]

A normal ZFS storage can only be used for VM/LXC virtual disks. If you want to store backups on it you need to create a dataset (for example zfs create YourPool/backups) and then add a directory storage to your PVE (Datacenter -> Storage -> Add -> Directory) pointing to the mountpoint of that dataset (should be /YourPool/backups). If you select "Vzdump" as content type for that directroy storage you can store your backups there. But keep in mind that a ZFS pool should always be kept 20% free so don't fill it completely up with backups.