Added possibility to use any compatible form of network block filesystem. Updated readme.

README.md

@@ -12,8 +12,8 @@ It can handle:
   two ports is SSH (so admin gets simpler).
 - Connection via SSH.
 - Shared directory between host and guest.
-- Last, but not least, running the virtual machine with all
-  these options.
+- Last, but not least, running the virtual machine with a
+  combination of the previous options.
 
 ## Setup information and usage
 
@@ -88,6 +88,24 @@ At this point you should see your virtual machine running in a TigerVNC window.
 
 Note: the VNC traffic goes through SSH TCP forwarding, so it is encrypted.
 
+## Interesting applications
+
+If you happen to use a form of network filesystem, such as 
+[GlusterFS](http://docs.gluster.org/en/latest/),
+you can keep the machine hard disk off the host and put it on another computer.
+There might be a some form of lag depending on the hardware, protocol and 
+network connections.
+
+An example with GlusterFS might be:
+
+    vhd_name="gluster+tcp://server-address/gluster-volume/"$img_name"."$vhd_type""
+
+This will work provided that you install the QEMU GlusterFS block module 
+package (if it's not already present in the QEMU package itself).
+
+You should consult the QEMU's manual to learn about all possible compatible 
+network filesystems.
+
 ## Help
 
     Usage: qvm [OPTION]

qvm

@@ -141,8 +141,7 @@ run()
 
     export QEMU_AUDIO_DRV=alsa
 
-    if [ -f "$vhd" ]; then
-        qemu-system-x86_64 \
+    qemu-system-x86_64 \
 -m "$vm_memory" \
 -enable-kvm \
 $enable_vnc \
@@ -154,11 +153,7 @@ hostfwd=tcp::"$ssh_host_port"-:"$ssh_guest_port" \
 security_model=none,mount_tag="$mount_tag" \
 -soundhw ac97 \
 -display "$display" \
-"$vhd" &
-    else
-        printf "VHD file \""$vhd"\" is missing.\n"
-        exit 1
-    fi
+-drive file="$vhd" &
 }
 
 remote()