Join Mike Meyers for an in-depth discussion in this video RAID overview, part of CompTIA A+ Exam Prep (220-901) Part 2: Core Hardware.
- A long time ago, a bunch of very groovy professors…in Berkeley, California came up with a thought…and the thought was as hard drives get bigger…and bigger and bigger,…is there a benefit of using a bunch of hard drives…that act, bark, smell, taste like one drive…as opposed to using just one physical drive…and the answer is yes.…This process, which we call RAID…or random array of independent devices,…is based on the premise that…it's better to have a lot of littler drives…that act like a big drive than one big drive.…
The two benefits are speed and data safety.…Now, you can combine speed and data safety…in a lot of different ways and as a result of that…they create what are known as RAID levels…and they go from RAID 0, one, two, three, four, five,…six, one plus zero, zero plus one, RAID 10, RAID 7,…there's a bunch of different RAIDs.…What I want to do is just cover the RAID versions…that are actually on the A exam,…which I completely agree are the most important ones.…So to appreciate RAID, let's start right…at the very beginning, which is RAID 0.…
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