---
title: "A9LH to B9S"
---

{% include toc title="Table of Contents" %}

### Required Reading

This page is for existing arm9loaderhax users to update their consoles to boot9strap.

All future releases 'o Luma3DS gunna only be made in th' `.firm` format, which gunna only be workin' on systems wit' boot9strap 'n sighax. 'Tis means that if ye want to continue to be receivin' th' latest updates 'o Luma3DS, ye should use 'tis page to be updatin' ye installation.

To extract the `.7z` files linked on this page, you will need a file archiver like [7-Zip](http://www.7-zip.org/) or [The Unarchiver](https://theunarchiver.com/).

While we believe that custom firmware is safe for online use, there have been online network bans in the past, primarily for cheating and suspicious eShop behavior.
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### What You Need

To use the [magnet](https://wikipedia.org/wiki/Magnet_URI_scheme) links on this page, you will need a torrent client like [qBittorrent](https://www.qbittorrent.org/download.php) or [Deluge](http://dev.deluge-torrent.org/wiki/Download).
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Note that, only on New 3DS, `secret_sector.bin` is needed to revert the arm9loaderhax exploit, which is why it is not needed for the installation of boot9strap on a stock console. If ye do not have a New 3DS, ye gunna not be needin' `secret_sector.bin`.
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* <i class="fa fa-magnet" aria-hidden="true" title="'Tis be a magnet link. Use a torrent client to download the file."></i> - **New 3DS Users Only:** [secret_sector.bin](magnet:?xt=urn:btih:15a3c97acf17d67af98ae8657cc66820cc58f655&dn=secret_sector.bin&tr=udp%3a%2f%2ftracker.torrent.eu.org%3a451%2fannounce&tr=udp%3a%2f%2ftracker.lelux.fi%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.loadbt.com%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.moeking.me%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.monitorit4.me%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.ololosh.space%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.pomf.se%3a80%2fannounce&tr=udp%3a%2f%2ftracker.srv00.com%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.theoks.net%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.tiny-vps.com%3a6969%2fannounce&tr=udp%3a%2f%2fopen.tracker.cl%3a1337%2fannounce&tr=udp%3a%2f%2ftracker.zerobytes.xyz%3a1337%2fannounce&tr=udp%3a%2f%2ftracker1.bt.moack.co.kr%3a80%2fannounce&tr=udp%3a%2f%2fvibe.sleepyinternetfun.xyz%3a1738%2fannounce&tr=udp%3a%2f%2fwww.torrent.eu.org%3a451%2fannounce&tr=udp%3a%2f%2ftracker.openbittorrent.com%3a6969%2fannounce&tr=udp%3a%2f%2f9.rarbg.com%3a2810%2fannounce&tr=udp%3a%2f%2ftracker.opentrackr.org%3a1337%2fannounce&tr=udp%3a%2f%2fexodus.desync.com%3a6969%2fannounce&tr=http%3a%2f%2fopenbittorrent.com%3a80%2fannounce) (magnet link)
* The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest) (the Luma3DS `.zip` file)
* The v7.0.5 release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/download/v7.0.5/Luma3DSv7.0.5.7z) (direct download)
* The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/download/v0.0.7/SafeB9SInstaller-20170605-122940.zip) (direct download)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/download/1.4/boot9strap-1.4.zip) (direct download)

### Instructions

#### Section I - Prep Work

Fer all steps in 'tis section, overwrite any existin' files on ye SD card.
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1. Power off your console
1. Insert ye SD card into ye computer
1. Copy `boot.firm` and `boot.3dsx` from the latest version Luma3DS `.zip` to the root of your SD card
    + The root of the SD card refers to the initial directory on your SD card where you can see the Nintendo 3DS folder, but are not inside of it
1. Copy `arm9loaderhax.bin` from the v7.0.5 Luma3DS `.7z` to the root of your SD card
1. Copy `SafeB9SInstaller.bin` from the SafeB9SInstaller `.zip` to the `/luma/payloads/` folder on your SD card
    + If the `luma` or `payloads` folder doesn't exist, create them
    + Delete any other existing `.bin` payloads (`GodMode9.bin`, `Decrypt9WIP.bin`, `Hourglass9.bin`, etc.) in the `/luma/payloads/` folder on your SD card as they will not be compatible with boot9strap compatible Luma3DS versions
1. Create a folder named `boot9strap` on th' root 'o ye SD card
1. Copy `boot9strap.firm` 'n `boot9strap.firm.sha` from th' boot9strap `.zip` to th' `/boot9strap/` folder on ye SD card
1. **New 3DS Users Only:** Copy `secret_sector.bin` to th' `/boot9strap/` folder on ye SD card

    ![]({{ "/images/screenshots/a9lh-to-b9s-root-layout.png" | absolute_url }})
    {: .notice--info}

1. Reinsert your SD card into your console

#### Section II - Installing boot9strap

1. Boot your console while holding (Start) to launch SafeB9SInstaller
    + If you see the luma configuration screen instead of SafeB9SInstaller, simply press (Start), then shut down your 3DS and try again
    + If this gives you an error, try either using a new SD card or formatting your current SD card (backup existing files first)
1. Wait fer all safety checks to be completed
    + If ye get an "OTP Crypto Fail" error, download <i class="fa fa-magnet" aria-hidden="true" title="'Tis be a magnet link. Use a torrent client to download the file."></i> - [aeskeydb.bin](magnet:?xt=urn:btih:d25dab06a7e127922d70ddaa4fe896709dc99a1e&dn=aeskeydb.bin&tr=udp%3a%2f%2ftracker.tiny-vps.com%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.lelux.fi%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.loadbt.com%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.moeking.me%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.monitorit4.me%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.ololosh.space%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.pomf.se%3a80%2fannounce&tr=udp%3a%2f%2ftracker.srv00.com%3a6969%2fannounce&tr=udp%3a%2f%2ftracker.theoks.net%3a6969%2fannounce&tr=udp%3a%2f%2fopen.tracker.cl%3a1337%2fannounce&tr=udp%3a%2f%2ftracker.torrent.eu.org%3a451%2fannounce&tr=udp%3a%2f%2ftracker.zerobytes.xyz%3a1337%2fannounce&tr=udp%3a%2f%2ftracker1.bt.moack.co.kr%3a80%2fannounce&tr=udp%3a%2f%2fvibe.sleepyinternetfun.xyz%3a1738%2fannounce&tr=udp%3a%2f%2fwww.torrent.eu.org%3a451%2fannounce&tr=udp%3a%2f%2ftracker.openbittorrent.com%3a6969%2fannounce&tr=udp%3a%2f%2f9.rarbg.com%3a2810%2fannounce&tr=udp%3a%2f%2ftracker.opentrackr.org%3a1337%2fannounce&tr=http%3a%2f%2fopenbittorrent.com%3a80%2fannounce&tr=udp%3a%2f%2fexodus.desync.com%3a6969%2fannounce), then put it in the `/boot9strap/` folder on your SD card and try again
{%- include_relative include/install-boot9strap-safeb9sinstaller.txt inline="true" -%}
1. Your console should have rebooted into the Luma3DS configuration menu
    + Luma3DS configuration menu are settings for the Luma3DS custom firmware. Many of these settings may be useful for customization or debugging
    + For the purpose of this guide, these settings will be left on default settings
    + If you get a black screen, [follow this troubleshooting guide](troubleshooting#boot-issues-on-consoles-with-custom-firmware)
1. Press (Start) to save 'n reboot

___

### Continue to [Finalizing Setup](finalizing-setup)
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