Adding more drives

At any rate, I think a worthy improvement to the Sentinel series would be an option for manual RAID array control (even if it came with a page long disclaimer in legalese about how you could really muck things up if you don’t know what you are doing). I, for one, would have liked to turn my 8TB four drive array into a 6TB three drive array with a spare fourth drive. Have you seen the cost of replacement drives? They (the 2 TB model) range from about $270 to over $400 each depending on the vendor, and they seem to be an uncommon drive model. It’s almost more cost effective to buy another sentinel for spare drives!