I've added my new 4x 1.5TB drives, set up a RAID 5 pack, and begun the data migration off the old data stripe.
Estimated migration time is about 33 hours.
I'm moving data off an existing 4 drive stripe (Samsung Spinpoint EchoGreen 1.5TB drives), and platering the data into a new 4 drive RAID 5 volume (Same Sammy drives).
I plan on doing a RAID level migration to RAID 6 once the hard drives are freed up and tested (I had a few hiccups I think on possibly 2 of those drives). Thus I'll have my original wish of an 8 drive RAID 6 volume.
Thank you areca ARC-1260!
To get there I'll first have to free up the stripe volume of 4 1.5TB drives. once I have all the data moved over to my new RAID 5 volume, I can then stress test the old stripe drives.
Once I validate they golden, I'll add 1 to the existing RAID 5 volume, the ARC-1260 supports RAID level migration, allowing me to add the new 5th drive and convert the array from RAID 5 to RAID 6.
Once the data rebuild completes, (yes this is all online, with out losing data) I can then add the remaining 1.5TB drives to the volume with OCE.
OCE is Online Capacity Expansion, another goodie brought to you by the ARC 1260 card. Yeah... it was over $800 but WELL worth it, I've actually debated upgrading the RAM onboard from 256MB to the max 1GB, and adding the battery backup option.