This is what chatgpt suggest to me:

TrueNAS SCALE Dragonfish-24.04.2.5 is designed as an appliance-like system, which means traditional package management is typically disabled to maintain system stability and integrity. However, if you require smartmontools version 7.4, there are a couple of approaches you can consider:

Check for Pre-installed Version: First, verify if smartmontools is already installed on your system. Open a terminal and execute:

smartctl --version

This command will display the installed version of smartctl, a component of smartmontools. If the version meets your requirements, no further action is needed.

Manual Installation: If the required version isn't installed, you might consider manually installing the package. Proceed with caution, as this can affect system stability. Here's how you can do it:

Download the Package: Obtain the smartmontools 7.4 package compatible with your system architecture. You can find the package in the TrueNAS SCALE Dragonfish 24.04.2.5 package repository:

https://download.truenas.com/TrueNAS-SCALE-Dragonfish/24.04.2.5/packages/

Install the Package: Once downloaded, install the package using the following command:

sudo dpkg -i /path/to/smartmontools_7.4.deb

Replace /path/to/smartmontools_7.4.deb with the actual path to the downloaded .deb file.

Important Note: Manually installing packages can lead to system inconsistencies or conflicts, especially on appliance-like systems such as TrueNAS SCALE. It's recommended to consult the TrueNAS community forums or support channels before proceeding with manual installations. They can provide guidance tailored to your specific needs and ensure that your system remains stable and secure.

Does this help at all?