diff --git a/proxmox.md b/proxmox.md
index 7f5ce6b..ff4b4af 100644
--- a/proxmox.md
+++ b/proxmox.md
@@ -7,3 +7,19 @@ ssh into host proxmox and execute
 root@spanskiduh:~#  qm set <vm_id> --cpu host
 ```
 Next go to web interface and shut down the machine (just reboot won't work).
+
+
+### Add data disk to vm
+
+Firstly locate your partition using: 
+
+```bash
+ls -n /dev/disk/by-id
+```
+
+Then add it to vm using:
+
+```bash
+ /sbin/qm set <vm-id> -virtio2 /dev/disk/by-id/<disk-uuid>
+ /sbin/qm set 102 -virtio2 /dev/disk/by-id/ata-WDC_WD10EARS-003BB1_WD-WCAV5L270787-part1
+```