diff --git a/readme.md b/readme.md
index 790cf3b..4fb00e0 100644
--- a/readme.md
+++ b/readme.md
@@ -80,6 +80,30 @@ docker run -it --rm -e "BOOT=http://www.example.com/image.iso" --device=/dev/kvm
 
     Replace the example path `/home/user/data` with the desired storage folder.
 
+  * ### How do I add multiple disks?
+
+    To add multiple disks, modify your compose file like this:
+
+    ```yaml
+    environment:
+      DISK2_SIZE: "32G"
+      DISK3_SIZE: "64G"
+    volumes:
+      - /home/example2:/storage2
+      - /home/example3:/storage3
+    ```
+
+    Additionally, it's also possible to passthrough raw disk devices like this:
+
+    ```yaml
+    environment:
+      DEVICE2: "/dev/vdc1"
+      DEVICE3: "/dev/vdc2"
+    devices:
+      - /dev/vdc1
+      - /dev/vdc2
+    ```    
+
   * ### How do I increase the amount of CPU or RAM?
 
     By default, a single core and 512 MB of RAM are allocated to the container. To increase this, add the following environment variables:
diff --git a/src/entry.sh b/src/entry.sh
index ea46202..1853105 100755
--- a/src/entry.sh
+++ b/src/entry.sh
@@ -31,9 +31,9 @@ STORAGE="/storage"
 
 cd /run
 
-. install.sh   # Get bootdisk
+. install.sh    # Get bootdisk
 . disk.sh       # Initialize disks
-. network.sh  # Initialize network
+. network.sh    # Initialize network
 
 KVM_ERR=""
 KVM_OPTS=""
diff --git a/src/install.sh b/src/install.sh
index 1aa1782..e01bf9c 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
 
+[ -f "$STORAGE/boot.img" ] && return 0
+
 TMP="/boot.img"
 rm -f "$TMP"