RAID - CompTIA A+ 220-1101 - 3.3

[@s3thsational]

Still trying to wrap my head around RAID arrays, but your examples helped me understand it better.

[@crispyvenom2844]

I recommend the youtube channel PowerCert Animated Videos

[@crispyvenom2844]

@@shawnmendrek3544 🤓☝️

[@crispyvenom2844]

@Shawn Mendrek it means noone needs snarky comments

[@crispyvenom2844]

@Shawn Mendrek no problem dude I'm sorta wrong to for starting something

[@quakerboats9840]

Extremely important distinction made @0:53. Thank you Professor Messer.

[@dlgraves00]

This has probably been the hardest thing to grasp, for me personally, out of the entire course.. Taking the exam today though so hopefully I understand it well enough to leg it through any questions involving RAID config. I do pretty well on my practice tests but still seem to get stumped on these 😅

[@xanwess]

how’d you do?

[@sandmaneyes]

​@@xanwesshe died

[@dawnskinner1920]

Thank you for your explanation of RAID. You have helped me to finally understand RAID.

[@Jason-jk3tn]

Can you explain why Raid 1 is not considered a backup? You are mirroring a drive to another drive to maintain file access in case one hard drive fails, isn't that what a backup is?

[@hassan5708]

I'd like to know this as well

[@ACCELERATED_VIDEOS]

Important data should have an off-site backup and/or cloud server backup.

[@douglasduda9826]

So, for a real backup you want to have them be on a completely separate location and media. Just in case that computer/drive fails or maybe the building burns down? IT needs to be independent.

[@VixinLVL70]

@@douglasduda9826 Thank you! Makes perfect sense!

[@saulgoodmansfingerr8527]

@@douglasduda9826 genius

[@thedogfather1204]

Thank you so much for your help Professor Messer! Completing your practice tests now and should pass core 1 exam fairly soon!!

[@mikecardenas3032]

Not sure if I'll get an answer but I'll try asking anyway.. thank you for all the videos though, they are a big help!... Anyway my question is.. Are the Raid disks located and configured on the storage device- independently?.. but on the storage device?.. or are they completely independent of the stoarge device all together? Thanks again in advance for all these videos.

[@Kodiak73]

Hey Mike! RAID is configured in the BIOS where you both select which disks to use in a RAID array and what type of array to use. I work at geek squad and hate having to do this on client's machines... very repetitive over and over again lol

[@mikecardenas3032]

@@Kodiak73 Thank you very much👍🏽. This is helpful.

[@ehizuelenabhulimen8433]

thank you sir, for your content. I will give back soon

[@mohameddeeq5344]

what if the parity disk fails?!

[@professormesser]

The parity is usually distributed across multiple drives, but losing the parity would not have any effect on data availability. It would prevent any recovery if a drive was to fail, of course.

[@jjvexist]

I'm confused. So, what is the difference between backing up data (making a copy) and mirroring that data? Isn't duplication essentially the same thing as copying it? I understand RAID is a collection of drives mirroring data off each other for redundancy, but that just seems like backing up data across multiple active drives.

[@professormesser]

You can separate the concepts of RAID and a backup if you consider what happens when a user opens a spreadsheet, deletes all of the info, and saves the spreadsheet. RAID will create a redundant copy of the empty spreadsheet. Your separate backup system will be able to restore yesterday's spreadsheet file.

[@Mikeppodcast]

Thank you Messer!

[@mattsterh7740]

what is a real life example of RAID being used? I'm assuming on a server or something like that as opposed to a pc.

[@SufiKingdom]

You can ask AI, I use Prof. Messer’s videos, and as follow up questions to AI, and learn a lot. Everything make sense. I always ask for real life examples and AI provides. Super helpful. It’s like you have a professor with you, but make sure you use latest Chat GPT.

[@ShadreckMbariro]

i like the way you explain, though am still trying to understand the concerpt

[@hassan5708]

Thanks for the clear explanation! 😃

[@Randumb96]

Simple and helpful

[@gainzovereverything7719]

So does Raid 1+0 provide speed as well?

[@BOBBAFETTI]

@@sinzumoneyy Well, after going through everything on WIKIPEDIA. RAID 0 only speed but no redundancy, RAID 1 only redundancy but no speed improvement, RAID 2,3,4 and 5 (redundancy and speed but the speed improvement is less than the improvement RAID 0 gives. One being bit level, one byte level and the last 2 are block level parity), RAID 10 both the redundancy of 1 and the speed improvement of 0. And then RAID 6 (which came after RAID 10), an increase of speed in comparison to 10 with the same redundancy as there is dual level striping where 10 has the same single level striping as 0. Have I got it right here Professor ???

[@Johnny-ge5uv]

Thank you!

[@AlyssiaStation]

What so with RAID 0 are we effectively doubling speed? Do both drives have to be the same speed? I guess that's not important for the test...