Experts! I have a challenge. I have an existing system to which I need to add storage capacity, for the best possible performance per dollar. I have two drive cabinets, each having a capacity of 14 drives, each with 8 bays full. The drives are 72GB each, the raids are in a 0 + 1 configuration. That has given us 271 GB storage each cabinet, for a total of 542 GB. We use this storage for both data and backups. It's worked great, but it's getting full. Here are my thoughts: 1. Just fill the rest of the bays with new drives of the same size. Works, but it's still too small for 12 months projected growth. 2. Remove existing drives from one, and put 6 of them in the other. Then fill the newly-empty cabinet with bigger (144 GB?) drives. I worry about a performance hit with the bigger drives. Should I worry? 3. Add another controller and drives for an additional volume, dedicated only to backups. Save some bucks by making the additional volume somewhat less robust, since backup will be its only function. 4. Aquire Litespeed. Which is the best?