ReadyDLNA does not find all files (dirs, files missing)

Chokobanana, thank you for posting the below, sadly I am a SSH/linux/unix (I don't even know what OS it is!) newbie, so have tried to follow the instructions, but am stuck. I expect I am making a simple mistake and hope you can help!!!

I have a MS2110 Netgear NAS, and have managed to SSH in to root access, and I was able to search for the minidlna process, and also got similar from the help file (no "-S changes behaviour for systemd", but the rest was the same word for word), as below:

"Usage:
        /usr/sbin/minidlna [-d] [-f config_file]
                [-a listening_ip] [-p port]
                [-s serial] [-m model_number]
                [-t notify_interval] [-P pid_filename]
                [-w url] [-R] [-V] [-h]

Notes:
        Notify interval is in seconds. Default is 895 seconds.
        Default pid file is /var/run/minidlna.pid.
        With -d minidlna will run in debug mode (not daemonize).
        -w sets the presentation url. Default is http address on port 80
        -h displays this text
        -R forces a full rescan
        -V print the version number"

I've tried to force a full rescan with the below command:

bash-3.2# /usr/sbin/minidlna -R

but all that happens is the help opens again. I notice you used $ systemctl stop minidlna to stop the process, but systemctl doesn't appear to be a command in my version. Instead I've tried rebooting the NAS figuring that would stop the process and I could try to start the full rescan command on a clean boot, but this also had the same effect of opening the help rather than rescanning.

I've tried:

/usr/sbin/minidlnad -R

/usr/sbin/minidlna -d -R

and other variations with no luck

Can you tell me what I am doing wrong please? What do I need to type into the terminal to force a rescan?

Many thanks!!!