GREETINGS again.
Time to upgrade to 4TB X 4 = 11.17TB or 12TB RAID 5 (Seagate Desktop HDD.15 ST4000DM000 4TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive 5900 RPM)
Identical Hardware
Time to initialize? 55 hours,
This seems to be an interesting metric, it's a little over 200GB per hour, so that may be a rule of thumb to get into the ballpark on how long it's going to take to initialize your RAID 5.
Hope these updated numbers are helpful l again to someone somewhere.