diff --git a/napalm_proxmox/vm_mixin.py b/napalm_proxmox/vm_mixin.py
index 3e2ad12..ee26d95 100644
--- a/napalm_proxmox/vm_mixin.py
+++ b/napalm_proxmox/vm_mixin.py
@@ -255,6 +255,7 @@ class ProxmoxVMMixin:
                     "",
                 )
 
+                disks, onboot = self._get_vm_disk_and_boot(vmid, "qemu")
                 result.append({
                     "vmid": vmid,
                     "name": name,
@@ -270,6 +271,8 @@ class ProxmoxVMMixin:
                     "ipv4": ipv4,
                     "agent_enabled": agent_enabled,
                     "agent_running": agent_running,
+                    "disks": disks,
+                    "onboot": onboot,
                 })
         except Exception as exc:
             logger.warning("get_vms: failed to list QEMU VMs: %s", exc)
@@ -296,6 +299,7 @@ class ProxmoxVMMixin:
                     "",
                 )
 
+                disks, onboot = self._get_vm_disk_and_boot(vmid, "lxc")
                 result.append({
                     "vmid": vmid,
                     "name": name,
@@ -311,12 +315,67 @@ class ProxmoxVMMixin:
                     "ipv4": ipv4,
                     "agent_enabled": agent_enabled,
                     "agent_running": agent_running,
+                    "disks": disks,
+                    "onboot": onboot,
                 })
         except Exception as exc:
             logger.warning("get_vms: failed to list LXC containers: %s", exc)
 
         return sorted(result, key=lambda x: x["vmid"])
 
+    # Disk-key prefixes for QEMU: scsi, virtio, ide, sata (exclude cdrom/none entries)
+    _DISK_KEYS_VM = re.compile(r"^(scsi|virtio|ide|sata)\d+$")
+    # Disk-key prefix for LXC: rootfs, mp (mount points)
+    _DISK_KEYS_CT = re.compile(r"^(rootfs|mp\d+)$")
+
+    def _get_vm_disk_and_boot(
+        self, vmid: int, vm_type: str
+    ) -> tuple[list[dict], bool]:
+        """Return (disks, onboot) for a VM or container.
+
+        Fetches config from /nodes/{node}/{qemu|lxc}/{vmid}/config.
+        Each disk entry is a dict with 'name' and 'size_mb'.
+        Returns ([], False) on any error.
+        """
+        try:
+            if vm_type == "qemu":
+                cfg = self._node_api().qemu(vmid).config.get() or {}
+                disk_re = self._DISK_KEYS_VM
+            else:
+                cfg = self._node_api().lxc(vmid).config.get() or {}
+                disk_re = self._DISK_KEYS_CT
+
+            onboot = bool(int(cfg.get("onboot", 0) or 0))
+
+            disks: list[dict] = []
+            for key, value in sorted(cfg.items()):
+                if not disk_re.match(key):
+                    continue
+                val_str = str(value or "")
+                # Skip CD-ROM / none entries
+                if "media=cdrom" in val_str or val_str.startswith("none"):
+                    continue
+                # Extract size=NNX from the value string
+                m = re.search(r"\bsize=(\d+)([GMK]?)", val_str, re.I)
+                if not m:
+                    continue
+                num = int(m.group(1))
+                unit = m.group(2).upper()
+                if unit == "G" or unit == "":
+                    size_mb = num * 1024
+                elif unit == "M":
+                    size_mb = num
+                elif unit == "K":
+                    size_mb = num // 1024
+                else:
+                    size_mb = num * 1024
+                disks.append({"name": key, "size_mb": size_mb})
+
+            return disks, onboot
+        except Exception as exc:
+            logger.debug("Failed to fetch disk/boot config for vmid %s: %s", vmid, exc)
+            return [], False
+
     _POWER_ACTIONS_VM = {'start', 'stop', 'shutdown', 'reboot', 'reset'}
     _POWER_ACTIONS_CT = {'start', 'stop', 'shutdown', 'reboot'}