It all depends on your budget, but I would speak to a specialist company and see what they can offer or recommend to you. The amount of drives you need to store 100tb will set you back around £10,000 for basic sata drives, and this is excluding suitable raid controllers etc..! This is the sort of setup that needs to be managed properly and I say this as adviceand with respect and im not taking the piss out of you, so please dont think that- If you need to ask what you need for this job, do you have the ability to install and manage it?