Add Gentoo + Persistence to E2B

Here is how to boot from a Gentoo ISO file with persistence.

I used the livedvd-x86-amd64-32ul-20140826_gentoo.iso download.

The cheat code needed is in the form aufs=/dev/sdX3  where X is the USB drive.

Since the USB drive number will vary from system to system, we have to try to guess what Gentoo will assign the USB drive as!

Instructions

1. Use RMPrepUSB to make an ext2 FileSystem file:

• File Name=aufs32-rw  (or aufs64-rw if you are booting to the 64-bit version)
• Volume Name = aufs-rw  (must always be this name!)
• Size = 256MB or larger

2. Place the ISO and the .mnu file in a suitable folder (e.g. \_ISO\LINUX\MNU) and run WinContig.

3. Edit the .mnu file if you need to change the filename to suit your ISO

4. When you boot using the .mnu file, Gentoo will initially ask you for the persistence size - enter the size of the file that you initially created.

The .mnu file will be in the next version of E2B, and is shown below:

# Make a \aufs32-rw or \aufs64-rw ext2 file using RMPrepUSB in the root of the drive using RMPrepUSB
# File Name=aufsXX-rw  Volume Name=aufs-rw size=anything over 256MB
# Place this .mnu file and the ISO in either \_ISO\MainMenu\MNU or \_ISO\LINUX\MNU
# This menu will work even on an NTFS USB boot drive
# IMPORTANT: you MUST run WinContig (Ctrl+F2) before booting E2B.
# On first boot (only), Gentoo will prompt you for the size of the persistence file

iftitle [if exist $HOME$/livedvd-x86-amd64-32ul-20140826_gentoo.iso] gentoo 32-bit + persistent\n Gentoo with persistence
set PER=/aufs32-rw
set ISO=$HOME$/livedvd-x86-amd64-32ul-20140826_gentoo.iso
set me=
if not exist me geometry (hd1) > nul || if not exist me set me=/dev/sda3
if not exist me geometry (hd2) > nul || if not exist me set me=/dev/sdb3
if not exist me geometry (hd3) > nul || if not exist me set me=/dev/sdc3
if not exist me geometry (hd4) > nul || if not exist me set me=/dev/sdd3
if not exist me geometry (hd5) > nul || if not exist me set me=/dev/sde3
if not exist me geometry (hd6) > nul || if not exist me set me=/dev/sdf3
if not exist me geometry (hd7) > nul || if not exist me set me=/dev/sdg3
if not exist me geometry (hd8) > nul || if not exist me set me=/dev/sdh3
if not exist me geometry (hd9) > nul || if not exist me set me=/dev/sdi3
echo
echo -e I guess that the USB drive will be $[0104]%me%
set /p me=Press [ENTER] if correct - else type in correct device (e.g. /dev/sdx) : 
echo
echo Assuming persistence file %PER% is on %me%
#enable parttype output
debug 1
# make empty table entry in 3rd position in ptn table
parttype (%E2BDEV%,2) | set check=
debug off
set check=%check:~-5,4%
if "%check%"=="0x00" partnew (%E2BDEV%,2) 0 0 0
if not "%check%"=="0x00" echo WARNING: PTN TABLE 3 IS ALREADY IN USE - PERSISTENCE WILL NOT WORK! && pause
debug 1
if not exist %PER% echo WARNING: %PER% persistence file not found! && pause
errorcheck off
set P=0
if "%check%"=="0x00" partnew (%E2BDEV%,2) 0x0 %PER% && set P=1
errorcheck on
/%grub%/QRUN.g4b force.isodefault %ISO%
root (0xff)
kernel /isolinux/gentoo root=/dev/ram0 init=/linuxrc aufs=%me% looptype=squashfs loop=/image.squashfs cdroot vconsole.keymap=$bootkeymap locale=$bootlang $modeset_opt $nox $acpi_opt console=tty1 --
initrd /isolinux/gentoo.igz
boot

iftitle [if exist $HOME$/livedvd-x86-amd64-32ul-20140826_gentoo.iso] gentoo 64-bit + persistent\n Gentoo with persistence
set PER=/aufs64-rw
set ISO=$HOME$/livedvd-x86-amd64-32ul-20140826_gentoo.iso
set me=
if not exist me geometry (hd1) > nul || if not exist me set me=/dev/sda3
if not exist me geometry (hd2) > nul || if not exist me set me=/dev/sdb3
if not exist me geometry (hd3) > nul || if not exist me set me=/dev/sdc3
if not exist me geometry (hd4) > nul || if not exist me set me=/dev/sdd3
if not exist me geometry (hd5) > nul || if not exist me set me=/dev/sde3
if not exist me geometry (hd6) > nul || if not exist me set me=/dev/sdf3
if not exist me geometry (hd7) > nul || if not exist me set me=/dev/sdg3
if not exist me geometry (hd8) > nul || if not exist me set me=/dev/sdh3
if not exist me geometry (hd9) > nul || if not exist me set me=/dev/sdi3
echo
echo I guess that the USB drive will be $[0104]%me%
set /p me=Press [ENTER] if correct - else type in correct device (e.g. /dev/sdx) : 
echo
echo Assuming persistence file %PER% is on %me%
#enable parttype output
debug 1
# make empty table entry in 3rd position in ptn table
parttype (%E2BDEV%,2) | set check=
debug off
set check=%check:~-5,4%
if "%check%"=="0x00" partnew (%E2BDEV%,2) 0 0 0
if not "%check%"=="0x00" echo WARNING: PTN TABLE 3 IS ALREADY IN USE - PERSISTENCE WILL NOT WORK! && pause
debug 1
if not exist %PER% echo WARNING: %PER% persistence file not found! && pause
errorcheck off
set P=0
if "%check%"=="0x00" partnew (%E2BDEV%,2) 0x0 %PER% && set P=1
errorcheck on
/%grub%/QRUN.g4b force.isodefault %ISO%
root (0xff)
kernel /isolinux/gentoo64 root=/dev/ram0 init=/linuxrc aufs=%me% looptype=squashfs loop=/image.squashfs cdroot vconsole.keymap=$bootkeymap locale=$bootlang $modeset_opt $nox $acpi_opt console=tty1 --
initrd /isolinux/gentoo64.igz
boot