Update README.md

README.md

@@ -10,10 +10,26 @@ From what I researched there does not exist a consumer-grade external USB drive
 
 ## Hardware
 - 8x 4TB WD HDDs
-- 1x LSI MegaRAID SAS 2208 PCIe card
+- 1x LSI MegaRAID SAS 9286-8e PCIe card
 - 1x Semi-Modular ATX PSU
 - 1x ATX Breakout Board
 - 2x Mini-SAS 26 pin to 4X SATA 7 pin breakout cable
 - 2x ATX PSU 6 pin to 4X SATA 15 pin power cable
 - 1x 40mm 5v USB fan
-- 1x 3.5 inch HDD enclosure holding 8 drives
+- 1x 3.5 inch HDD enclosure holding 8 drives
+
+## Overview
+
+```
+ATX PSU and SFF PC receive power from mains
+            ↓
+ATX Breakout Board activates PSU 
+            ↓
+6 pin power supply cables provide power to SATA drives from ATX PSU
+            ↓
+SATA breakout cables connect from drive data pins to external facing SAS ports on RAID card 
+            ↓
+USB fan plugged into PC port and bound by silicone adhesive to heatsink cools RAID card 
+            ↓
+RAID controller / array is managed from within the Linux OS utilizing MegaCLI
+```