You're setting yourself up for data loss if you use RAID-5 with large consumer drives -- I wouldn't trust less than RAID-6 because the chance of a second failur

You're setting yourself up for data loss if you use RAID-5 with large consumer drives -- I wouldn't trust less than RAID-6 because the chance of a second failure while rebuilding the array after the first drive failed is too great. Especially since you likely don't have a cold spare on hand, so you have to wait a week to get the replacement drive. RAID-1 may be better since the rebuild is faster and doesn't stress the disks so much.