Never used anything but RAID 1 on my Synology NAS. Had a drive fail there once and rebuilding the array was as simple as swapping it for a new one (took a few h

Never used anything but RAID 1 on my Synology NAS. Had a drive fail there once and rebuilding the array was as simple as swapping it for a new one (took a few hours but it was truly "plug and play" and no data was lost). Do the things mentioned on the article imply that a system like the Promise Pegasus2 R6 12TB (6 by 2TB) Thunderbolt 2 RAID System (http://store.apple.com/us/product/HE152VC/A/promise-pegasus2-r6-12tb-6-by-2tb-thunderbolt-2-raid-system http://store.apple.com/us/product/HE152VC/A/promise-pegasus2...) is actually not guaranteed to survive 1 HD crash when configured in RAID 5? I'm a bit confused now, would appreciate any help there...