Hi All, Current Mac Pro : Mac Pro 5.1 333 Ghz, 6-Core Intel Xeon (2012 / Westmere) 32 GB RAM, Mac OS 10.6.8 Bay 1 | 1TB, WD Black | Boot Drive | 325 GB on disk Bay 2 | 1TB, WD Black | 500GB Boot Clone + 500GB Photoshop Scratch Partition Bay 3 | 2TB, WD Black | Work A | 870 GB on disk Bay 4 | 2TB, WD Black | Work B | 900 GB on Disk External Time Machine Back Up OWC QX2 | RAID JBOD Bay 1 | 1TB Bay 2 | 1TB Bay 3 | 2TB Bay 4 | 3TB I'm very intrigued by the idea of switching to RAID 10. I'd still keep my incremental hourly time machine backups, but the additional speed, plus drive failure insurance sounds perfect. However, since RAID 10 requires all 4 internal bays, I'm having trouble thinking out the logistics. 1. According to Tech support at OWC, booting from RAID 10 is not recommended, they suggested booting from a PCIE card. Question 1: Can somebody confirm this, or is there another way? Question 2: Can I have partitions on RAID 10, perhaps a small partion to boot from? 2. I have done a little research, and it would seem that Western Digital Red drives are well suited for RAID but these are 5400 rpm. Question 3: Is there a good choice at 7200 rpm? Question 4: What ever happened to WD "RE3" drives? last time I researched this a few years, those were on my shortlist, now it seems many retailers don't carry them, I dont even see them on the Western Digital website. 3. The OWC Qx2 has a setting for RAID5, and I think I'd like to do that. Right now my JBOD RAID means 1 drive failure = loss of all time machine data. I'd like to buy 4x 4TB drives, plus a few spares. The folks at OWC don't recommend the variable speed energy saving drives for RAID but I need help narrowing down the list. Question 5: Any recommendations for hard drives if I do raid in this external box? It is a firewire connection, so I know it's going to be slow no matter what, just want to buy something that works and is rock solid stable. Thanks!