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The Raspberry Pi 4 has great I/O performance with USB 3.0 and Gigabit Ethernet. That makes it ideal for a Do-It-Yourself NAS (Network Attached Storage). If you connect 1, 2 or even 4 hard drives, what kind of read/write performance will you get? What levels of RAID should you use? Let's find out.

If also need a step by step guide to building a NAS with a Raspberry Pi, then I have a video about that as well:    • Use any Raspberry Pi to build a NAS -...  

RAID Levels:    • What is RAID (RAID 0,1,5,10)? - Gary ...  

Megabits per second (Mb/s) vs Megabytes per second (MB/s):    • Megabits per second (Mb/s) vs Megabyt...  

Introduction to Android app development: https://www.dgitacademy.com

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