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-rw-r--r--README.md8
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diff --git a/README.md b/README.md
index 6378db3..40c68f7 100644
--- a/README.md
+++ b/README.md
@@ -149,6 +149,9 @@ password, use only in trusted environments.
##### `ENABLE_HARDNET`=false
Enable IPv4/IPv6 network stack hardening settings.
+##### `ENABLE_SPLITFS`=false
+Enable having root partition on an USB drive by creating two image files: one for the `/boot/firmware` mount point, and another for `/`.
+
##### `CHROOT_SCRIPTS`=""
Path to a directory with scripts that should be run in the chroot before the image is finally built. Every executable file in this direcory is run in lexicographical order.
@@ -167,3 +170,8 @@ After the image file was successfully created by the `rpi2-gen-image.sh` script
bmaptool copy ./images/jessie/2015-12-13-debian-jessie.img /dev/mmcblk0
dd bs=4M if=./images/jessie/2015-12-13-debian-jessie.img of=/dev/mmcblk0
```
+If you have set `ENABLE_SPLITFS`, copy the `-frmw` image on the microSD card, then the `-root` one on the USB drive:
+```shell
+bmaptool copy ./images/jessie/2015-12-13-debian-jessie-frmw.img /dev/mmcblk0
+bmaptool copy ./images/jessie/2015-12-13-debian-jessie-root.img /dev/sdc
+```