Join Mike Meyers for an in-depth discussion in this video Hard drive overview, part of CompTIA A+ Exam Prep (220-901) Part 2: Core Hardware.
- We have so many different types…of mass storage technologies today.…Here I've got a traditional hard drive…and an SSD, but I could also use things like…optical media, or USB thumb drives,…or all kinds of stuff like that…and today's modern operating systems…can handle all of them.…Well how can they do that?…Well there has to be some kind of commonality…and that commonality is called…Logical Block Addressing or LBA.…Let me show you how that works.…Here is a typical hard disk drive.…
Now we do have the rotational media…and the little voice coil moving back and forth,…but the problem is is you can't really see…the data stored on there, 'cause it's magnetic…and it's teeny, teeny, tiny.…So imagine if I had some king of magical teeny tiny…magnetism viewer, like this magnetron.…And it's going to zoom in, and now if we take a look,…we can see that data is stored…in discreet chunks called sectors.…Now, on a modern hard drive these sectors…are 4,096 bytes, although for many decades…it was only 512 bytes.…
The important thing is, is that it's always stored…
The CompTIA A+ 220-901 exam is comprised of six key parts. The second, core hardware, is covered by this course. Instructor Mike Meyers explains the essential components and functions of motherboards, power supplies, and hard drives. He also shows you how to work with chipsets, troubleshoot electrical issues, implement RAID, and how to determine which hard drive technology to use depending on the circumstance.
Note: The six courses designed for the CompTIA A+ (220-901) exam preparation include core processing, core hardware, peripherals and building a PC, displays and printers, networking, and laptops and mobile devices.
- Working with motherboards, chipsets, and expansions
- Choosing a power supply
- Evaluating hard drive technologies
- Implementing RAID
- Troubleshooting issues