Install DSM 7.2 on DIY NAS (RR Loader, DS925+ Emulation) – F8 SSD Plus / F4-424Pro / F4-424MAX

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Kevin
Posts: 8
Joined: 26 Jan 2024, 14:10
China

Install DSM 7.2 on DIY NAS (RR Loader, DS925+ Emulation) – F8 SSD Plus / F4-424Pro / F4-424MAX

Post by Kevin »

Install DSM 7.2 on DIY NAS (RR Loader, DS925+ Emulation) – F8 SSD Plus / F4-424Pro / F4-424MAX

Applicable Models: F8 SSD PLUS, F4-424 Pro, F4-424MAX
This tutorial uses RR boot (rr.img), Synology DS925+, to install DSM 7.2 system.

1. Preparation

You will need the following tools and files:
  • RR boot image (rr.img): Used to create the bootable USB drive.
  • USB Drive: It is recommended to use a USB 3.0 drive with at least 8GB capacity.
  • Flashing Tool: balenaEtcher is recommended.
  • Monitor, keyboard, mouse, HDMI cable: Needed for the initial setup.
  • Ethernet cable with internet access
balenaEtcher Download Link: https://www.balena.io/etcher/
RR Boot Image Download Link: https://github.com/RROrg/rr/releases

2. Create Bootable USB Drive

1. Insert the USB drive.
2. Open the balenaEtcher software.
3. Click “Flash from file” and select your rr.img image.
4. Click “Select target” and choose your USB drive.
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5. Click “Flash” to start writing.
6. After flashing is complete, safely eject the USB drive.

3. BIOS Settings

F8 SSD PLUS / F4-424 Pro Settings:
  • Press DEL during boot to enter BIOS.
  • Go to: Boot -> TOS Boot First -> Disable
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  • Set Boot Option #1 to RR.img boot USB drive.
  • Press F4 to save and exit BIOS.
F4-424MAX Settings:
  • Enter BIOS -> Fast -> TOS Boot First -> Disable
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  • Boot -> UEFI USB Drive BBS Priorities -> Boot Option #1 -> RR.img boot USB drive
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  • FIXED BOOT ORDER Priorities -> Boot Option #1 -> RR.img boot USB drive
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  • Press F4 to save and exit BIOS.
4. Enter RR Boot and Configure

1. After booting with the USB drive, you will see the GRUB menu, select: Configure loader
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2. Access the RR configuration page in your browser.
Configuration Steps:
  • Click “Choose a model”, select DS925+
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  • Click “Choose a version”, select 7.2.2-72806-0
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  • Go to Advanced menu
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  • Set HDD sort (hostplug) to true
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  • Click “Build the loader”
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  • Once completed, click “Boot the loader”
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5. Install DSM System

1. Open the DSM installation page
Access via browser: http://10.18.8.204:5000 (IP address may vary)
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2. Automatically download and install DSM
  • Click “Install”
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  • Choose to automatically download and install DSM system
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  • System will reboot after installation
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3. Initial Configuration
  • Set device name
  • Create admin account and password

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6. System Configuration Suggestions
  • It is recommended to choose “Manual Update” to avoid system issues caused by automatic updates.
  • You can skip Synology account binding.
🎉 Installation Complete!

You have successfully installed DSM 7.2. You can now enjoy the powerful features of Synology NAS!

If you have any questions, feel free to leave a comment in this thread.
User avatar
Elujin
Posts: 3
Joined: 07 Dec 2025, 00:02
United States of America

Re: Install DSM 7.2 on DIY NAS (RR Loader, DS925+ Emulation) – F8 SSD Plus / F4-424Pro / F4-424MAX

Post by Elujin »

Hello,

My Issue with TOS6:
I brought it for Sync on Demand feature only to find out Mac is not supported (I also cannot see anywhere about TOS7 bringing the feature)

I am upgrading from a 4 bay DSM 918+ to a 6 bay F6-424 Max and the specs on the Terramaster for the money were so much better I really got use to Synology Drive Client where I could see my files and choose on the fly to pin and free up items only to present with the same feature set from TerrasSync only to miss the "On Demand Sync is for Windows only" note

I would assume the install would also work for the F6-424Max as well but from the option of selecting a DSM the DS925+ doesn't really match my box

Would I just need to select a different model and if so what is the best related selection from the menu of DSM choices.. if I just select the DS925+ like you did will it only see 4 of the bays and not 6 then?

Thanks for any help / Support (Since I know it doesn't directly apply to this Guide, but this was the best thread I found)
User avatar
fisk
Posts: 1
Joined: 01 Jan 2026, 22:21
Faroe Islands

Re: Install DSM 7.2 on DIY NAS (RR Loader, DS925+ Emulation) – F8 SSD Plus / F4-424Pro / F4-424MAX

Post by fisk »

Elujin wrote: 07 Dec 2025, 12:28 No longer needed thanks
How did you resolve this; which model did you end up picking?
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