Need Help Managing My Hard Drives

Hello Everyone. First i am inexperienced with Linux and Cent-OS. So please forgive my ignorance.

I will try my best to explain my problem and what i actuaclly want.

I have a dedicated server with 3 Hard Drives and 1 SSD. The Centos 7 is installed on the 80 GB SSD and now three hard drives are free.

Among these three hard drives two are on raid controller. Which logically means i have two extra hard drives, (As raid will show two same hard drives as one).

Now i have two hard drives free which i want to use to store my data. But the problem is that, previously i was storing my data in /var/www/html

And now if i start uploading my files to /var/www/html the SSD will get full which i dont want. Even if i bind one of my hard drives to that directory the SSD will get full.

So Here IS The Question.

  1. How Can I Use Both Of My These Extra hard Drives to work on a same directory. I made a previous thread about this and one of the mod also replied thanks to him, but i messed up and had to reinstall OS.
  2. After making these two hard drives work together, where should i point them? so that my SSD dosent gets full.

Or in simple words, I want my two extra hard drives work together and i upload files to them and users access them through Nginx web server but i dont want to upload files to my SSD.

I hope i made clear what i want.** And please if you have solution type all of the commands because i am inexperienced.**

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Do you initialized and partitioned your 2 hard drives? I see that you have 3 partitions on SSD, but I don’t see any on other hard drives. If you didn’t, you can follow DigitalOcean tutorial - How To Partition and Format Storage Devices in Linux.

Once you do this, or if you are already done, you can proceed.

/var/ and all other directories and files there (/var/www/html and so on) are on root / file system. Your root file system is on your SSD. To overcome this, you have two possibilities. You can change your nginx server block to use another location for /var/www/html. Location of files are defined by root directive. Example server block:

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        root /var/www/html;
        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
                try_files $uri $uri/ =404;

Root directive is what you want to change. After change is:

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        root /mnt/www/html;
        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
                try_files $uri $uri/ =404;

This is most easiest solution. Change /mnt/www/html with location where you mounted hard drive. There you also need to upload files.

Second and riskier solution is to try to mount your hard drive to /var/www. In that case, you can go with default nginx config, but you should change /mnt/data from above linked tutorial to /var/www. Please be very careful when doing so! There is risk behind this, I didn’t tested this myself, but AFAIK it should work in theory!

Because i always found helpful guides here. am i doing something wrong?

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