diff --git a/ResizeDiskImage.md b/ResizeDiskImage.md
index 73d0279d..c4e3e19e 100644
--- a/ResizeDiskImage.md
+++ b/ResizeDiskImage.md
@@ -20,6 +20,14 @@ To grow the private disk image of a AppVM beyond this limit [qubes-grow-private]
 qvm-grow-private <vm-name> <size>
 ```
 
+Note: Size is the target size (i.e. 4096MB or 16GB, ...), not the size to add to the existing disk.
+
+Note2: If once the VM is started, the disk is has not been increased, you can issue in the VM's terminal:
+
+``` {.wiki}
+sudo resize2fs /dev/xvdb
+```
+
 ### HVM disk image
 
 In this example we will grow the disk image of an HVM to 30GB.