Here's the results of the survey question:

What type of SERVER hard disk subsystem do you use for your DATA volume?

Count Percentage Survey Answer
8 62% RAID-5 Array (Parity Striping)
0 0% RAID-10 Array (Striping and Mirroring)
2 15% RAID-1 Array (Mirroring Only)
3 23% Single Hard Drive (NO RAID)
0 0% Dual 5.25 Floppies

Total Answers = 13