What is RAID 0, 1, 5, & 10?

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RAID explained. This is an animated video explaining different RAID levels. It's a RAID tutorial of level 0, 1, 5, & 10. Redundant array of independent disks English and Hindi captions.
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[PowerCertAnimatedVideos]

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[philipramsden]

This is why my server room has a sign saying "No hammers or lasers allowed in server room"

[programmingwithberns]

Illustrations are awesome. Saved me hours of reading chunks of textbook stuff without understanding. Thanks for the tutorial.

[seabearclips]

It’s impossible to describe how beneficial your videos are with these animations. They always answer every question I have and make me understand so much faster.

[kdan]

I could never completely wrap my head around RAID. You managed to get me to understand and comprehend in a matter of five minutes. Thank you!

[JoseRodriguez-rxck]

RAID 0 -> 00:53
RAID 1 -> 01:55
RAID 5 -> 02:27
RAID 10-> 03:49

[prasadfalke]

The guy is a legend, passed a couple of interviews in the past because employers nowadays are focusing more on basics.
Being a networking guy myself, I didn't know about certain things and every now and then I visit PowerCert videos and also shared the same among other students or non-technical people who are trying to embark IT/Networking journey.

God bless him.

[Kamer.Sounds]

The dry humour in these videos keeps me going

[sameeulhuda]

This was amazing...everything...from the animations to the humor to the soothing voice to the way it all was explained! Liked and subscribed!

[HimmReaper]

OMG I was struggling trying to fully understand RAID, but this animation completely explained it in the most basic form. THANK YOU!

[NoEggu]

If you want both speed and data redundancy, then (aside from some of the less common RAID configurations not covered in this video) RAID 5 would be best.

RAID 5 offers close to RAID 0 performance, while maintaining data redundancy (in case of a drive failure).
RAID 5 can (and should) survive a single drive failure (any one drive can fail), and no data loss should occur. Upon replacing the failed drive, the RAID controller will rebuild the array (populate the new drive with data), and upon completion, it will be like nothing ever happened.

When a drive fails, the RAID 5 effectively becomes a RAID 0. So if yet another drive fails, before you replace the first failed drive, then you are doomed. And that first failed drive must be replaced, and the array completely rebuilt, before the array becomes fault tolerant (before it could withstand another drive failure).

The time it takes to rebuild a failed drive mostly depends on how much data you have. The speed of the drives matters, too. Unless you have multi-terabytes of data, repopulating a new drive should take under one hour (and probably less than that). If you have multi-terabytes of data, it is still no big deal, as the rebuild will just take a few hours, perhaps. And you can use your computer what this takes place.

When this video was made, RAIDs were a good way to squeeze out lots of performance from mechanical drives. However, with today's solid state drives (SSDs), a single NVMe SSD will outperform any mechanical RAID setup. Note that NVMe SSDs are far, far faster than AHCI SSDs (most, and by a wide margin, home computers have the latter, at the time of writing this comment (2019)).

So if you want both super speed and redundancy, then a RAID 1, consisting of two NVMe SSDs, is the way to go.
But you will have to find a motherboard that supports two physical NVMe SSDs.

Lastly, a hardware RAID is best (as opposed to a software RAID).
For example, if you use a software RAID 5, that means that you are using your operating system (probably Windows) to manage the RAID. This presents two problems.
1) There will be a performance hit, as your CPU will have to manage the RAID. In most cases, you will not notice this. But the next issue is serious:
2) If one of your drives fails, then Windows might not boot (depending on which drive failed). This is because Windows was managing the RAID 5, but Windows must be running in order to manage the RAID 5. In order for Windows to start, it reads only one boot drive (and if that is the drive that failed, then you are screwed).

To put it another way, when Windows starts, it will start as a single drive (no RAID). Once it gets to a certain level in booting up, it will start the RAID service. But it must boot up in order to do this.

With a hardware RAID 5, your array is managed by your storage controller (which is independent of Windows -- it runs before Windows starts). Also, the controller is independent of your CPU, meaning that it has its own processor that manages the RAID 5, and takes no toll on your CPU.

Cheers!

[bhatia]

I have read about RAID many times but never felt confident that I understood it completely until watching this video... Very well explained.. Thanks

[Rhynri]

This is my go-to video for teaching people how raid works.

[dastanharris]

I learned about Raids in under 5 minutes. A short and easy to understand course, suitable for beginner or even 8 year old could understand this. Thank you and keep up the great work.

[samduplama]

Been through many YouTube techs and techies channel but man you explain things in a way that even non techies would easily understand. Highly appreciated for your works. Keep posting more videos like these.

[jenniferadamu]

This is the best CompTIA A+ tutorial channel so far as far as I'm concerned because the explanation is as simple as possible. Thumbs up!

[aungoftheoo]

One of the most simple and easy to understand videos I’ve ever watched. Amazing work! Keep at it!

[lipequints]

This is a great presentation, well done! It makes understanding RAID so easy. Brilliant work.

[trendx]

Learn more in 5 min then 45 min taking my course. Many of your videos have really help me bring things to life. Thank you for your service.

[silence]

I watched 5 videos on RAID, today, and this one was, by far, the most helpful. Thanks for making and posting it!