I am interested in getting a better storage solution than I have today, but I am a bit confused about viable alternatives. I am also a raid newbie (I have so far regarded raid as "yet another layer that can go wrong"). I want: - Storage solution for that can handle >10TB data - Possibility to expand up to 15TB - Security is a priority, with a possibility for off-site backup. - No real need for high bandwidth - Budget $3000-4000 (excluding discs) What I have today: MacPro 2x2.8 '08, 16GB ram Internal: 1 Intel SSD boot, 5 x 2TB WD (green non-raid) in single disk setup Sonnet Tempo E4P Esata card External: 2 Esata cabinets (Sonnet+ Firmtech) each with 5x2 TB disks JBOD. Some of my thoughts: Using 2, or even better 2x2 , external sata cabinets for backup. Some sort of raid solution as main storage on my Macpro, with a capacity equal to 6x2TB. Using an external cabinet seems necessary(?). I would be very happy for suggestions and advice!