A+ Topic: RAID

RAID, the acronym variously explained as “redundant array of inexpensive disks” or “independent disks,” is critical on the A+, Network+, Security+ and Linux+ CompTIA exams (at the least).

Here’s some great LinuxMagazine articles that walk you through the variants:

“Introduction to RAID” at http://www.linux-mag.com/id/7924/

“Intro to Nested-RAID: RAID-01 and RAID-10” at http://www.linux-mag.com/id/7928

“Nested-RAID: RAID-5 and RAID-6 Based Configurations” at http://www.linux-mag.com/id/7931?hq_e=el&hq_m=1154685&hq_l=4&hq_v=55610542ec

The Madness of the USBs (and Thunderbolts and alternate modes…)

I see rough issues coming for A+ students in terms of identifying the sudden proliferation of USB versions and ports, Thunderbolt versions, “alternate modes” and “multiplex modes.” Consumers are going to face lots of compatibility problems, because there are so many modes: some cables do one thing, while other cables that look identical do different things. And how about Thunderbolt over USB? Nightmare is a legitimate description.


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Excellent TechRepublic Article: “10 mistakes to avoid when troubleshooting IT problems”

Don’t you hate those clickbait “10 Great Pictures of …” or “10 Mistakes Men Make,” etc. etc.?

I say, as always, consider the source. For instance, TechRepublic is a pretty darn reliable, high-quality site for the hard-core geek (and you are one if you’re here reading this).

Whether trying to diagnose a single device or dealing with the urgency of a company-wide outage, there are solid best practices on what NOT to do. With that in mind, here are 10 things to avoid doing, so you can limit the pain and keep things running as smoothly as possible….

Yes! Exactly! Please show me your painful mistakes so I can wince and try to avoid them forever (at least try). Check out the list and see what you think:


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