Introduction to RAID

[@loboisagod]

The nerds and trolls come out in droves to criticize and nitpick. Eli, let me fire back for ya. First of all, look at the description dummies,..."Beginner". If you guys are as smart as you think you are, why are you watching "beginner" videos? For a "beginner", this is a very good video for learning what an array is. Also, this video is 6 years old. Some stuff has changed since then. And where's your instructional videos, smarty pants? Oh, you can dish it out, but you can't take it...because you're afraid of someone crapping on you, the way you just did. Keep cranking out the vids, Eli. Good stuff.

[@AAR8511]

I have being doing quite a bit of research on tutorial videos, and trust me NO ONE explains things better than Eli. You are a legend!!!!

[@michaelstyler1606]

Up to 12 minutes is basically everything you need to know at a simplistic level about RAID 0, 1, 5 and how they are different from one another. Thanks for sharing Eli.

[@aimeehammond6964]

Eli, These videos are seriously getting me through my Cert IV. Thank you for being so clear!

[@23Aike6]

The Teacher, The Mentor, The Master, The Professional. Eli the Computer Guy! Thank you!

[@flaviomorocho7175]

pretty interesting to see his intial videos. He is trying to move his hands present what he is trying to explain. Whereas, now his doesn't care and looks more calm. I love his videos specially the latest ones.

[@Snowflakes_7]

No one can convey this to me , in such easy way, its only you. You are awesomme!!!

[@atlant2566]

Thank you for great explanation. Well explained. I knew nothing about raid and now it is more clear to me. Give Eli thanks because he takes his time explaining to us who doesn't not know. For people who said its nothing new because you learned from someone else. Thanks again.

[@tunewriter2005]

Eli, you are still the Shiznit! I came directly here because I have a son going for a server interview and he needs to really know this as well as networking basics and troubleshooting concepts. Thanks as always for awesome content !!!!

[@TECHNO90000]

very good lecture....i keep on downloading all your videos to my hard drive..i have separately bought new hard drive 500gb only for downloading Eli lectures..

[@hiimgarettable]

Mind blown by the 2 TB. What a time! Great video, Eli!

[@stevetyler2166]

Eli you explain things in such an uncomplicated way I m enjoying learning and understanding it. Your helping me through my Microsoft Fundermentals exam.

[@Khyree_Holmes]

Eli is the best, i'm learning alot about IT work as a computer savvy person, this is entertaining. lol...thanks Eli!!!!!!! I have a knack at PCs and this helps me grow in knowledge of IT work!

[@sureshpatgunarajah1455]

Any one can understand and Thank you Mr.Eli for explaining in detal........ Thanks

[@mahiguru6927]

You are simply the best, I have seen most of your videos I learnt most out of it... You are the best teacher I have ever seen ..it takes a lot... :) Thanks for all your effort.

[@tommorgan4837]

Thanks Eli. Very good intro to RAID. Appreciate you taking the time to do this for all of us!

[@rishiraj7011]

first of all thank you very sir. all that you are bringing to us .i have been watching your videos.from last couple of months...and i am highly influenced, we get many new things to learn in great depth..we students need an instructor like you so thank you very much....

[@Ramasegoo]

Still priceless knowledge in 2020. Eli, THANK YOU!

[@TheRealBonafideLover]

Love the videos, i'm taking ENE with no actual IT background (nose bleed) and your videos really helps me understand the basics. Thanks! keep it up..

[@FrancisDanso]

.....Now i know ....Eli u re such a goooooood tutor....lov your video classes....thankx dude.

[@sriharshasolasa2243]

Excellent video, clear explanation. It's nice to see Nataraj idol behind you.

[@qwertydestroyerable]

Hi Eli , Thank you so much I'm sure that you receive allot of thank yous but we can't help it , your the best I mean the best teaching when it come to explaining computer tecnology....

[@chesterpuffington8368]

Wow Eli thank you for that video it was really well done and presented in a simple manner that was easily understandable. I now know what my coworker / IT manager is talking about when he starts talking tech on RAID.

[@tommacdonald7880]

Loved the chair swivel at 32:25 , you should be called Don Eli after that beauty

[@pouyaism1975]

you are one of the best teacher in my whole life

[@abhisheksaxena9691]

It was never clear until you explained. I would like to say thank you very much and keep going !! God Bless you mate :)

[@Cazwhin]

Awesome nice nice, always the best

[@lloydharris6254]

nice video..as a side note.. on tinkering with a raid, in an event of a failure, you want to make use of the logs.. this helps in identifying the failed disk, flash the drive to make double sure it is in tandem with the log..Next, if possible, backup the entire volume before attempting any hot swap..

[@chohe01]

Thanks Eli, I never understood this before! Nobody really explained it to me like you have.

[@alexcordova8754]

Great video, I knew the basics of RAID but this taught me more than what I thought I knew. SO thank you very much for that!

[@BaSs_HaXoR]

Raid 0 = Stupid, good idea, but to risky. Raid 1 = Awesome Idea, great to keep things running. Raid 5 = Safer, my preferred choice (with sacrifice of space) Raid 10 = Beatiful. :')

[@shamtech348]

Was a bit confused about RAID, thanks for making it so clear.

[@oshaugh143]

Is that a pun i see

[@steveearle9678]

Best RAID5 explanation I've seen

[@harishvtl]

Hi Eli.. Thank you so much for this knowledge sharing.. What you give comes back.. God bless..

[@nefariousnilbog]

Even though it's old its a great video and very thorough. Thanks for the help.

[@bharat_kumar_tech8714]

Very Informative.Great video, Recently I've been learning a lot from ur videos. Very good Eli! U put alot of effort into these videos! Thank You Very Much. Finally, At the end of this video. the idol (The Lord Nataraja Swamy) is awesome.

[@alucard77719]

Big thanks for Eli for making this video. Great job!

[@MUSIKOFILIA]

Great teaching! Inspiring, easy-going and pragmatic. Even after 5y from its recording… Eυχαριστώ (thanks) Eli!

[@wants2sleep4ever]

Watching in 2018, when he said the max drive at the moment was 1TB, I realized we’ve come a very long way.

[@checkme1830]

Watching in 2021, it’s like holy shit. There’s such a thing as a 240 gigabyte hard drives? Wow, that’s really small! I got like 8 terabytes on one hard drive.

All you people thinking about RAID 0 being "unsafe" just because you don't get the redundancy: the amount of read-write cycles per drive decreases with every disk you have in the array, so if you have a large amount of small drives, RAID 0 may actually allow these drives to live the maximum possible life they can get (called MeanTimeBetweenFailures), plus you get the benefit of using those "first read - first write" speeds at all time.

[@alienJIZ1990]

Correct me if I'm wrong, but when you give your explanation of RAID 10 (1+0) around 14:00 it doesn't sound right to me... RAID 5 uses striping + parity, RAID 10 is literally RAID 1+0, which uses striping and mirroring, no parity, and allows 2 disks to fail with the minimum of 4 disks (unless 2 drives on both sides of the mirror fail). What you present seems more like RAID 55 (5+5)

[@sarahstade9805]

Technically its Redundant Array of Inexpensive Disk, the "Independent" is a more recent reference to it but as were tested in College the correct name is "Inexpensive", but its good to know both.

[@davidwangonjo2041]

very Informative. Great Video.

[@dapras]

Any time i need computer help i go to my guy Eli!..thanks dude

[@bkboggy]

I always always confused about RAID 5 until now. Thanks!

[@josueescobar4045]

Great video.

[@omrikatz2107]

redundant array of independent disks, originally named redundant array of inexpensive disks Donald, L. (2003). MCSA/MCSE 2006 JumpStart Computer and Network Basics (2nd ed.). Glasgow: SYBEX.

[@king3580]

Great video !!! understood very well the concept of RAID !!! Thanx a lot

[@kevinulliac4080]

"one really big 1TB hard drive", hehe, funny hearing that in 2018

[@eukaryote-prime]

I just bought 16 terabytes for a home server for $600 CDN. Crazy stuff.

[@thabisojerry1009]

wow...my textbook was way more complicated than this...now i got a clear picture thanks ELI

[@bigubee]

Nice job on explaining raid, size, and volume. I am going to apply them on my 8x HP DL360 5G serversfor hands on.

[@imranshaik6840]

Eli. I appreciate You....You are toooo Good......I am becoming your Fan....

[@SachinSama]

Very well explained Eli. I appreciate your efforts.

[@eliinthewolverinestate6729]

Thank you. Working on making a san/raid out of the 4 pi that run the greenhouse. Need a controller to switch gpios to back up. And a stand by power source in case of greenhouse solar failure.

[@AstraBoyVideo]

Eli, you are the best... great job

[@MohammadFadaee]

I wish you was my instructor :)

[@CH67guy1]

Mirroring sounds great. But once you pull out that failed drive, put in the new drive, and it is rebuilding, it seems like all your eggs are now in one basket until the new drive is fully built up to again mirror the drive that's been working the whole time.

[@CHETANKUMAR040]

it really helpfulllll thumps up man

[@abduljaleel6985]

Thanks ..Excellent & clear explanation ..

[@Ganeshkumar-rn4ph]

Nice Video it helps me a lot

[@GirishSharma]

thx eli for explaining in such detail!!!!by the way i also liked LORD SHIVA in brass behind u!!!!

[@Erlkonig24]

That turn at the end. Totally awesome :DDD

[@FTH1723]

you're a legend Eli

[@prasenjitchetri9899]

You have Nataraj statue at your back ..impressed

[@seanoreilly6551]

Striping = bits, thanks for this I was totally confused.

[@arancedisicilia75]

I'd like to point out a couple mistakes in the video (please correct me if I'm wrong): 1- What you describe as RAID 10 (or 1+0), that is "striping two mirrored drives", is actually 01 (or 0+1), that is "mirroring two striped drives"? 2- with RAID 5, if you have 3 drives with capacities 100, 250 and 750 GB (see around min 21:00), then you would have a total volume of 200 GB, not 300 GB, as one is for parity?

[@RandomTorok]

When using different sized hard drives can a second volume be created using the unused space of the larger drives?

[@user-qi9fs5hv7b]

Excellent Explanation thank you.

[@Shrivanurag]

eli, you are such a teacher!

[@rahimsalahadyn1772]

good stuff

[@Kingzleyy]

yeah, raid 10 is raid 0 plus raid 1. requires a minimum of 2 drives but is usually implemented with 4 drives to take advantage of the speed.

[@bazaguru]

Your explanation is the best. thanks

[@GIBBO19681]

Always learn from ur vids cheers

[@naronaroyan323]

How do you know witch HD has field in a RAID so that you wont accidentally take out the working HD and mess-up the RAID? also can you put 2 RAID controllers in 1 computer so that when 1 fails the 2nd 1 automatically starts without crashing the system?

[@virtuamagic]

i like your videos, very good training. Greets,

[@cryptocajun6070]

Great explaination!!!

[@gabichirila3351]

Hi Eli, regarding RAID 10: I am a little bit confused, you said you can lose all drive from one side and the system is able to go on. In your example you have described 6 disk in RAID 10 and you said you can lose 3 disk from left side array and everything it's fine. Is that correct? I am asking you because as far as I know if you lose a total side of the array (in your example left side) you lose all array.

[@tonybove2468]

How does performance differ between RAID0 and options that offer redundancy? I have 2x500GB SSD in RAID0 and I recently started running my own business so I need fault protection. Thinking about buying 2 more and going RAID10, but I don’t want performance to suffer. Thanks.

[@PeadarBoc]

On my study material it says RAID 5 is disk striping with parity spread among all disks. Whereas RAID 3 is disk striping with a single parity disk.

[@Mr_Mumble_PSN]

in regards to size and allocations in a raid 5 is it possible to partition HDD to be used in a raid 5? eg a 500, 500 and a 1TB can the 1TB be partitioned to x2 500GB?

[@TheBisha45]

Thanks for sharing the knowledge.

[@calvinfikirini1728]

I get enough about Raid. Thank u bro.

[@CononBarrett]

Awesome dude, very logical.

[@sscet2]

thanks man, all ur videos are gr8

[@danielfadayomi4543]

Eli the great.

[@spartan247]

I've got a question about the whole size vs volume thing. Lets say i have 32 SSDs linked up using a RAID 5 and i'm using 31 60GB SSDs and 1 480 GB SSD. Could i use the 480GB as the redundant drive and essentially have 480GB of usable physical memory? I mean, it makes sense, right? i'd have to write all the bits onto a larger SSD in order to have all the bits in the event one drive goes bad. 31x60=1860. Really, i'd need one 1860GB SSD in order to completely use all the memory, or am i misunderstanding something?

[@brandonfarfan1978]

Dude. This lesson was a really super informative.👍

[@amanletsgo]

Simply awesome :)

[@rit1503]

Very well explain...Thx a lot

[@MyRaj2005]

Excellent Explanation thank you............ Can we use C drive as RAID?

[@Asimov16]

Seeing that hard drives are not inexpensive, but VERY expensive shouldn't it be called RAED: Redundanct Array of Expensive Disks?

[@lordstinson8095]

For that reason, the "I" in RAID was changed to "Independent" instead of "Inexpensive" later on.

[@EliRuedaVega]

Ive heared it both ways, Independent or Inexpensive. Did a quick search and Wikipedia lists it as both

[@naronaroyan323]

If you have 200GB + 200GB + 400GB in a RAID 5 can you partition the 400GB in half and end up using the 200GB that was going to be lost?

[@MrTroutguy]

Question - When using disks of different sizes - You are limited to the smallest HD. Could you partition the other, larger drives for use? Either for a larger array or just extra usable disk space? Thanks in advance. Great vid btw, subscribed!

[@arivumanis]

Nice explanation and may be its not the right place to say this but I very surprised to see the Natarajar statue behind you which is Hindu God as well as its main temple is near to my home town Chidambaram,Tamil Nadu,India .

[@Gamerspot0]

How do you make the pc recognize the hard drives as raid 0 and raid 1. E.g. You want the 3 SSDs to be raid 0 and the 2 HDD to be raid 1

[@TheKyshu]

It doesn't recognize the array. When you pluck the new drives into your computer and boot it up, you can go into the BIOS settings or your raid controller's settings, and then manually create a RAID, ie. a logical drive. You then specify which drives you want to use (HDDs always have to be the same size for one array, ie. 1TB or 2TB) and what _type_ of array you wnat to create. For example, you say that those 4 harddrives with 2TB each are setup as a RAID 1. Then you say that the SSDs should be configured as RAID 0. Your system then writes the RAID info (ie. what type of raid it is etc.) on the harddrives. The next time you boot up your PC, the raid controller will read that info and tell your OS that there are 2 logical drives -> one being the RAID 1 array out of the 4 harddrives, as well as another one being the RAID 0 we configured out of the 2 SSDs.

[@dataemporium]

Thanks for the video, Eli. Is it true to say that RAID 5 is a "hybrid" of RAID 1 and 0? (Even though RAID 10 is really RAID 1+0).

[@BRUHItsABunny]

Ayyy it's only been 11 years but i finally had a use case for this

[@afrosamuri05]

I have two hdd and already have data on it, if i was to raid 0 them at a later date will it let me or would i have to wipe the hdd clean and reinstall everything after i raid them

[@derekcampbell561]

Great vids all round..Many thanks, Recently I've been learning a lot about Actifio (Copy data management) a comparison with say EMC would be great if you have the time big chap!