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MultiROM [Whyred][07-Apr][Miui/custom roms/GSI(treble))

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Shahan_mik3

Senior Member
Mar 8, 2013
4,979
16,044
Bangalore
Introduction

vh3puLb.png


MultiROM is one-of-a-kind multi-boot mod. It can boot any Android ROM as well as other systems like Ubuntu Touch, once they are ported to that device. Besides booting from device's internal memory, MultiROM can boot from USB drive connected to the device via OTG cable. The main part of MultiROM is a boot manager, which appears every time your device starts and lets you choose ROM to boot. You can see how it looks on the left image below and in gallery. ROMs are installed and managed via modified TWRP recovery. You can use standard ZIP files to install secondary Android ROMs and MultiROM even has its own installer system, which can be used to ship other Linux-based systems.

Features:
* Multiboot any number of Android ROMs
* Restore nandroid backup as secondary ROM
* Boot from USB drive attached via OTG cable

You can also watch a video which shows it in action.



Warning!

It _is_ dangerous. This whole thing is basically one giant hack - none of these systems are made with multibooting in mind. It is no longer messing with data partition or boot sector, but it is possible that something goes wrong and you will have to flash factory images again. Make backups. Always.​



Installation
Firstly, there are videos on youtube. If you want, just search for "MultiROM installation" on youtube and watch those, big thanks to all who made them. There is also an awesome article on Linux Journal.

You can install it either from MultiROM Manager app or from this guide:

MultiROM has 3 parts you need to install:
  • MultiROM - download the ZIP file from second post and flash it in recovery.
  • Modified recovery - download the IMG file from second post and use fastboot or Flashify app to flash it.
  • Patched kernel - You can use either one of the stock ones in second post or third-party kernels which include the patch, you can see list in the second post. Download the ZIP file and flash it in recovery.
You current rom will not be erased by the installation.
Download links are in the second post.


Adding ROMs
1. Android
Go to recovery, select Advanced -> MultiROM -> Add ROM. Select the ROM's zip file and confirm. As for the space, clean installation of stock 4.2 after first boot (with dalvik cache generated and connected to google account) takes 676mb of space.​

Using USB drive
During installation, recovery lets you select install location. Plug in the USB drive, wait a while and press "refresh" so that it shows partitions on the USB drive. You just select the location (extX, NTFS and FAT32 partitions are supported) and proceed with the installation.
If you wanna use other than default FAT32 partition, just format it in PC. If you don't know how/don't know where to find out how, you probably should not try installing MultiROM.
If you are installing to NTFS or FAT32 partition, recovery asks you to set image size for all the partitions - this cannot be easilly changed afterward, so choose carefully. FAT32 is limited to maximum of 4095MB per image - it is limitation of the filesystem, I can do nothing about that.
Installation to USB drives takes a bit longer, because the flash drive is (usually) slower and it needs to create the images, so installation of Ubuntu to 4Gb image on my pretty fast USB drive takes about 20 minutes.
Enumerating USB drive can take a while in MultiROM menu, so when you press the "USB" button in MultiROM, wait a while (max. 30-45s) until it searches the USB drive. It does it by itself, no need to press something, just wait.​


Updating/changing ROMs

1. Primary ROM (Internal)
  • Flash ROM's ZIP file as usual, do factory reset if needed (it won't erase secondary ROMs)
  • Go to Advanced -> MultiROM in recovery and do Inject curr. boot sector.
2. Secondary Android ROMs
If you want to change the ROM, delete it and add new one. To update ROM, follow these steps:
  • Go to Advanced -> MultiROM -> List ROMs and select the ROM you want to update.
  • Select "Flash ZIP" and flash ROM's ZIP file.



Source code
MultiROM - https://github.com/vasishath/multirom/commits/android-8.1 (branch master)
Modified TWRP - https://github.com/vasishath/android_bootable_recovery/commits/android-8.1-mrom (branch master)


Thanks a lot to Tasssadar for creating this awesome utility.

XDA:DevDB Information
Multirom, ROM for the Xiaomi Redmi Note 5 Pro

Contributors
Shahan_mik3, vasishath
Source Code: https://github.com/vasishath/multirom/commits/android-8.1

ROM OS Version: 8.x Oreo
ROM Kernel: Linux 4.x
ROM Firmware Required: Multirom TWRP

Version Information
Status: Alpha
Beta Release Date: 2018-03-28

Created 2018-03-19
Last Updated 2018-07-28​
 

robenn

Member
Sep 11, 2017
6
0
EDIT: Nevermind, found my mistake, There IS an uninstaller zip
I dont want to be a spoilsport but think twice before installing multirom, If you want to remove it in the future you need an unistaller zip which never gets released for unofficial devices. I did this with my mi pad and i really regret installing multirom as i dont want it anymore but cant remove it. So just be sure that you really want it.
Please correct me if i have missed out anything or i am wrong in my statements.
 
Last edited:

Shahan_mik3

Senior Member
Mar 8, 2013
4,979
16,044
Bangalore
I dont want to be a spoilsport but think twice before installing multirom, If you want to remove it in the future you need an unistaller zip which never gets released for unofficial devices. I did this with my mi pad and i really regret installing multirom as i dont want it anymore but cant remove it. So just be sure that you really want it.
Please correct me if i have missed out anything or i am wrong in my statements.

Let's say completely wrong. Chk op 2nd post
 
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    Introduction

    vh3puLb.png


    MultiROM is one-of-a-kind multi-boot mod. It can boot any Android ROM as well as other systems like Ubuntu Touch, once they are ported to that device. Besides booting from device's internal memory, MultiROM can boot from USB drive connected to the device via OTG cable. The main part of MultiROM is a boot manager, which appears every time your device starts and lets you choose ROM to boot. You can see how it looks on the left image below and in gallery. ROMs are installed and managed via modified TWRP recovery. You can use standard ZIP files to install secondary Android ROMs and MultiROM even has its own installer system, which can be used to ship other Linux-based systems.

    Features:
    * Multiboot any number of Android ROMs
    * Restore nandroid backup as secondary ROM
    * Boot from USB drive attached via OTG cable

    You can also watch a video which shows it in action.



    Warning!

    It _is_ dangerous. This whole thing is basically one giant hack - none of these systems are made with multibooting in mind. It is no longer messing with data partition or boot sector, but it is possible that something goes wrong and you will have to flash factory images again. Make backups. Always.​



    Installation
    Firstly, there are videos on youtube. If you want, just search for "MultiROM installation" on youtube and watch those, big thanks to all who made them. There is also an awesome article on Linux Journal.

    You can install it either from MultiROM Manager app or from this guide:

    MultiROM has 3 parts you need to install:
    • MultiROM - download the ZIP file from second post and flash it in recovery.
    • Modified recovery - download the IMG file from second post and use fastboot or Flashify app to flash it.
    • Patched kernel - You can use either one of the stock ones in second post or third-party kernels which include the patch, you can see list in the second post. Download the ZIP file and flash it in recovery.
    You current rom will not be erased by the installation.
    Download links are in the second post.


    Adding ROMs
    1. Android
    Go to recovery, select Advanced -> MultiROM -> Add ROM. Select the ROM's zip file and confirm. As for the space, clean installation of stock 4.2 after first boot (with dalvik cache generated and connected to google account) takes 676mb of space.​

    Using USB drive
    During installation, recovery lets you select install location. Plug in the USB drive, wait a while and press "refresh" so that it shows partitions on the USB drive. You just select the location (extX, NTFS and FAT32 partitions are supported) and proceed with the installation.
    If you wanna use other than default FAT32 partition, just format it in PC. If you don't know how/don't know where to find out how, you probably should not try installing MultiROM.
    If you are installing to NTFS or FAT32 partition, recovery asks you to set image size for all the partitions - this cannot be easilly changed afterward, so choose carefully. FAT32 is limited to maximum of 4095MB per image - it is limitation of the filesystem, I can do nothing about that.
    Installation to USB drives takes a bit longer, because the flash drive is (usually) slower and it needs to create the images, so installation of Ubuntu to 4Gb image on my pretty fast USB drive takes about 20 minutes.
    Enumerating USB drive can take a while in MultiROM menu, so when you press the "USB" button in MultiROM, wait a while (max. 30-45s) until it searches the USB drive. It does it by itself, no need to press something, just wait.​


    Updating/changing ROMs

    1. Primary ROM (Internal)
    • Flash ROM's ZIP file as usual, do factory reset if needed (it won't erase secondary ROMs)
    • Go to Advanced -> MultiROM in recovery and do Inject curr. boot sector.
    2. Secondary Android ROMs
    If you want to change the ROM, delete it and add new one. To update ROM, follow these steps:
    • Go to Advanced -> MultiROM -> List ROMs and select the ROM you want to update.
    • Select "Flash ZIP" and flash ROM's ZIP file.



    Source code
    MultiROM - https://github.com/vasishath/multirom/commits/android-8.1 (branch master)
    Modified TWRP - https://github.com/vasishath/android_bootable_recovery/commits/android-8.1-mrom (branch master)


    Thanks a lot to Tasssadar for creating this awesome utility.

    XDA:DevDB Information
    Multirom, ROM for the Xiaomi Redmi Note 5 Pro

    Contributors
    Shahan_mik3, vasishath
    Source Code: https://github.com/vasishath/multirom/commits/android-8.1

    ROM OS Version: 8.x Oreo
    ROM Kernel: Linux 4.x
    ROM Firmware Required: Multirom TWRP

    Version Information
    Status: Alpha
    Beta Release Date: 2018-03-28

    Created 2018-03-19
    Last Updated 2018-07-28​
    22

    Contents:
    • Multirom Zip
    • Multirom uninstaller
    • Multirom TWRP

    NOTE: TWRP ZIP is not FLASHABLE. Extract the img and flash it.
    12
    One more for backup
    12
    Wip...miui 9 Oreo, aosp gsi, Los what more do u want in life :cyclops: ;)
    9
    New build now available. Please check afh link.

    Changes
    * Update multirom recovery to latest twrp.
    * Update multirom to support GSI and treble roms as secondary rom.

    Flash new recovery first and then flash multirom zip.

    Note:- Lineage 14.1 will not work (for people with miui oreo as primary) till open source kernel release as xiaomi has modified data paritition to support quota feature. Only the new oreo kernel has support for the same.
    For using GSI rom as secondary, primary rom has to be miui oreo.

    Instructions to install a GSI rom as secondary will be provided shortly.