Updated README.md after pronouncing a new GRUBBY

README.md

@@ -2,6 +2,42 @@ Grubby Data Partition
 ================================================
 
 If you've found this USB stick, please get in
- touch via ericteunis@deboone.nl
+ touch via ericteunis@deboone.nl,
+ or +31613546355.
 
 This is the data part of this USB stick.
+
+
+Installation
+================================================
+There should be at least 3 partitions:
+ - `#1`: This data partition
+ - `#2`: A Bios boot partition
+ - `#3`: A simple EFI partition
+
+There is a space of 8Gb left for temporary OS `dd`ing
+between partitions `#3` and `#1`.
+
+To install GRUB for both EFI and BIOS booting I used the following.
+```bash
+# these have to mounted!
+DEV="/dev/sdb"
+EFI_MNT="/tmp/grubby-efi"
+DATA_MNT="/tmp/grubby"
+# Make EFI
+sudo grub-install --efi-directory="$EFI_MNT" --boot-directory="${DATA_MNT}/boot" --removable --recheck --target=x86_64-efi
+
+# Make BIOS
+sudo grub-install --boot-directory="${DATA_MNT}/boot" --removable --recheck --target=i386-pc "$DEV"
+
+# Make Isos Directory
+mkdir "${DATA_MNT}/boot"
+
+```
+
+
+Inspiration & Links
+================================================
+ - [GLIM](https://github.com/thias/glim)
+ - [ArchWiki](https://wiki.archlinux.org/index.php/Multiboot_USB_drive)
+ - [MultibootUSB](https://mbusb.aguslr.com/)