CompTIA A+ Certification Core 1 (220-1101) - Magnetic Disk Drives

The video tutorial provides an in-depth look at hard disk drives (HDDs), covering their components, such as platters and read-write heads, and explaining how data is stored magnetically. It discusses the evolution of HDDs in terms of physical sizes and storage capacities, from early models with 20 megabytes to modern drives exceeding 16 terabytes. The tutorial also explains the communication languages used by HDDs, focusing on Advanced Technology Attachment (ATA) and its evolution from Parallel ATA (PATA) to Serial ATA (SATA). It highlights the physical connectivity of SATA drives, including power and data connections, and introduces eSATA for external devices. Finally, the video covers system setup for HDDs and the significance of revolutions per minute (RPM) in classifying mechanical drives.

What are the physical sizes of hard disk drives mentioned in the text?

How has the capacity of hard disk drives changed from the early 90s to today?

What is eSATA and how does it differ from standard SATA?