Shared Storage

Shared storage allows multiple Proxmox nodes to access the same storage pool, enabling live migration of VMs and centralized backup storage. Also, if you have multiple devices clustered together, this can enable High Availability.
Storage Types in Proxmox
Directory — local filesystem path (default: /var/lib/vz)
LVM / LVM-Thin — local or shared block storage
ZFS — local ZFS pools
NFS — network file share (NAS integration)
CIFS/SMB — Windows network share
Ceph — distributed block storage (enterprise/advanced)
iSCSI — block-level network storage
Managing Storage
Content: each storage type can hold different content types (ISO, backups, VM disks, etc.)
Shared storage is available to all nodes in a cluster
Local storage (local, local-lvm) is only available on the local node
 
Adding NFS Storage
On your NAS, create an NFS share and note its IP and export path
In Proxmox web console, go to Datacenter > Storage > Add > NFS
Configure:
    • ID: give it a name (e.g., nas-storage)
    • Server: IP address of your NAS
    • Export: the NFS export path (e.g., /mnt/pool/proxmox)
    • Content: select what to store here (Disk image, ISO image, VZDump backup file, Container template)
Click Add, the NFS share appears in the left panel under all nodes
 
Adding CIFS/SMB Storage
Go to Datacenter > Storage > Add > SMB/CIFS
Enter Server IP, Share name, Username, and Password
Select Content types and click Add