Once again I am reviewing how I store my data. Recently I had 2 HD's die in my Synology array (The 2nd during the rebuild of the first failure), luckily I've salvaged every bit of data I had and all is ok. So my current strategy seems to work.

But I am near capacity of my backup server. I'd like to use these drives...

http://www.seagate.com/gb/en/products/enterprise-servers-storage/nearline-storage/archive-hdd/

...to make a large Cold Data Archive as most of the data I store long term is never looked at again, but I occasionally have a client come back to me years down the line after they have lost their wedding photographs.

My questions is, if the recommendation is to use these drives one their own how do I best use them to create one big pool? I'd like to use 4 of them ideally.

Cheers

Cris