I used to run an e-mail service with ~2m user accounts '99-'01. Our storage was an IBM ESS "Shark" stocked with 1.5TB of drives and two RS/6000 servers as the storage controllers.
Add on web frontends and mail exchangers, and the entire system was slower and had less aggregate RAM and processing power, less (and slower) disk (well SSD in my laptop) than my current $1500 laptop.
Add on web frontends and mail exchangers, and the entire system was slower and had less aggregate RAM and processing power, less (and slower) disk (well SSD in my laptop) than my current $1500 laptop.