IT Lesson #3 - Building a computer (part 2) - Data Storage

1.- First watch this youtube video:

A History of Hard Disk Drives (and How They Work)

https://www.youtube.com/watch?v=HLgzqanGHIg


2.- Concepts

• RPMs
• SATA version
• IDE, SCSI, SAS

Key questions:

• What are RPMs ? (on a disk drive)
• 5400 vs 7200 RPM, what's the difference?
• IDE, SCSI, SATA1,2,3 (etc),  SAS what are they?

3.- More concepts

• Bus speed vs disk speed
• Sequential Read / Write
• Random Read / Write

We will go back to hard drives in more detail later.

4.- A bit of history

• The GNU project
• Richard Stallman

Bonus:

Download Data Lifeguard Diagnostics from WDC, we will use it in a later module to check hard drive health.
https://support.wdc.com/downloads.aspx?lang=en