If you have a modern system you really don't need it. Remember, RAID 0 was invented way back when all there was were slow HDD. When SSDs came out a single one was many times faster than the fastest RAID HDD. Now that we have PCIe it is many times fast than that SSD and even RAID 0 SSD. Everybody wants more speed, but few user have application where they really need it. RAID 1 is certainly still valid.
@@radicalxedward8047 Thee are many levels or RAID each with its own unique functions. Speed tends to be (at least used to be) the most sought after of those levels.
@@Pay-No-Mind If you hadn't already learned, he's still owner and a big part and contributor to videos of LMG, but he hired a CEO to take care of CEO things.
RAID 2 exists but is basically obsolete because it uses its redundancy disk as a source of ECC, which modern hard drives already have included. RAID 3 and 4 work like RAID 5 does in that they have 1 disk's worth of fault tolerance through parity, but they store all of the parity on one disk rather than distributing it across them all like RAID 5 does. This makes 3 & 4 much slower on certain read/write operations. Don't know if they're considered obsolete, but they are generally inferior to RAID 5 and are thus rarely used.
Thank you for that clear, concise explanation! I'm a photographer and people keep saying I need a separate RAID set up to back up my files, but no one actually explained what that was in a simple manner. This was very helpful.
Hahahahahahahaha YES! I have to back up my po.... family memories quiet often but I prefer to back up most things on a NAS or portable drive, something so that if I need it urgently in another location I can have it there without the need of a desktop since I often use a laptop in different locations also. NAS/P drives are a bit more costly though whereas 1TB could be 40-50 dollars for internal, a pdrive could be 70-80... and an internal drive of 4tb is roughly 150-170, but a pdrive is roughly 180-250.
C Porter LOL, when do you need por...Family Memories UGENTLY in another location? LOLL, ''oh shii old lady walked in on me in the computer room, i better take this situation to the laptop and the bathroom'' LMAO. This made my day man. loll
+retrogamefox independant wouldn't be the right word because in a RAID 0 there is no independent drive, i think independant nor inexpensive is correct, but in general people would only raid drives if they are affordable otherwise they would stick with one drive and the price of SSD's is continuing to drop so I prefer inexpensive as well.
i would say independent over inexpensive as well because price points on disks change based on a number of factors and "expensive" is a very relative term to who is doing the purchasing, whereas "independent" would make far more sense with the though that you have X number of independent disks working together/in groups. depending on the raid level, not even all the disks manage the same function, just in the same grouping.
You're the man Linus. Keep it up. Thanks again. Haven't had to set up a system with redundancy, but a 3 minute video was exactly what I needed. Nothing more and nothing less. 100
Linus man, I gotta thank you for all your help in helping me learn about components and similar things. I'm building my very first PC (currently have an Alienware :( ) later this year, and couldn't have done it without you man!
Maybe I shouldn't say this cause I'm gona look stupid but... Dr Barnabus I couldn't work out were the ten came from. Need to lay off the pain killers me thinks...you completed my life for this evening lol thanks. :)
I'm Taking PC Repair and understanding almost everything (becuase of ltt and ncixtt) butt RAID and im so glad you have something like this. The only reason im going to get A+ certified is because of you guys and I legimently want to thank you so much.
Linus, not sure how this video came up in my search que but woe it is an amazing video. Even looking back on how you produced videos you had such a passion regardless of what is going on around you; Its simple, pure and directed. The honesty shines through to this day. You have lead me to build 12 computers and all of them posted even if me and the builders were not in the clearest of heads. and yet this video stil rings true as if it were almost the ultimate PC building guide
Marius Tancredi Ha! Inexpensive. Lol. How come SSDs are cheap. I doubt Intel X25-E is cheap, for a gigabyte I could eat... for a full day. Even a full week if I (am dedicated) want.
Tom Riddle: "Can you only RAID 0 the data once? For instance, isn't seven..." Professor Slughorn: "Seven! Merlin's beard Tom! Isn't it bad enough to consider splitting one drive? To rip the data into seven pieces... This is all hypothetical, isn't it, Tom? All academic?" Tom Riddle: [Smiling] Of course, sir. It'll be our little secret."
two errors: 1. minor mistake about raid 1: raid 1 gives you more read performance and IOPS. 2. huge mistake about raid 10: what you descried in the video (stripe between the two disks, and mirror the strips groups) is raid 0+1, or mirror of stripes. raid 10 is actually strips of mirror. it doesn't make much difference in a setup of 4 disks (since, well, you only get 2 groups and each group only get 2 members) but if you have say 6 disks, raid 0+1 will separate those disks in two raid 0 groups (3 each), and stripe between the 3 disks, whereas raid 10 will separate disks in 3 groups, each groups contain a mirrored (raid 1) disks, and data strips between groups. while you MAY loss up to half of the disks in raid 10 (vs 2 in raid 01) can still recover, your fault tolerance is really only one disk. reliability wise , raid 10 is better than raid 01, but they are nothing compared to RAID 6..
+TheBigchekka No, I just never understood the concept until Linus explained it. But now that I understand it, I find it difficult to explain why I didn't understand it before.
I needed to learn what raid was, and instinctively types "Linus Raid" in youtube. 7 years old but still great information. I hope you're feeling better!
I think you'd need 4 drives but I would not mix SSD and HDD personally. I would make the SSDs into a RAID 0 array and then have some other backup solution to back up the SSD array to the HDD. Just my opinion though. You may not notice a huge bottleneck but I would expect it.
Great Video! My Qs are.. 1. When RAIDING, is it recommend to have the drive be as close in manufacturing, storage space, and type (SSD w/ SSD, or SSD w/ HD) similarity as possible? 2. If my only intention was to have the drives have two separate OS(s) (i.e. Windows and Maverick); would RAIDING still benefit my needs? 3. What is the failure rate when considering any and all factors? Drive space, total use, and drive type? thank you
Thank you very much Linus, we have this in our exams and you helped clear it up. I was literally taking notes while you went on explaining about the RAID setups. Again, thank you very much.
So that's why you have all those hoop earings. You're not gay but smart. Its a raid setup. If you lose one or two you got backups.if you lose three tho, you're screwed and will look kinda straight with just one earing
+christopher jones O fuck me... I read this, scrolled back up and realized I hadn't even noticed all his 'cranium accessories,' then I laugh way too hard and long. Such a great comment.
I really like the invite to link to it on a website lol reminds of the good old days! you guys were pushing every avenue you could I guess and I appreciate that!
Love your videos. One minor correction: You're correct that RAID 1 gives you no increase in write performance, but it does (theoretically) give you double the read speed due to the controller reading interchangeably between the two disks. I say theoretical because I can't say for sure that all RAID controllers operate in this way or that you'd get the full double performance, but you will get faster read speeds with a mirrored setup than with a single drive.
thanks for this comment, I had rewatched the video 3 times and was still confused. As i'd thought i'd read somewhere and it also seemed logical, that if the data was stored across 2 drives, that you'd be able to read it quickker
1.) Does RAID 0, for example, describe the idea of striping data across multiple drives or striping the data across two drives? 2.) If the former, how many drives can be in RAID 0 and what limits my ability to do this? 3.) What is a hardware array and a software array and the advantages of one over the other? 4.) Can you setup a hardware and software array after you install the OS and install programs? RAID 0 stripes the data, so what goes on if you already have an OS and data? Can it just take bits of the first drive and add it to the second in some process and run it as normal without having to delete data or reinstall the OS? 5.) In any case, do you have the choice of setting up a hardware or software array before or after installation of the OS and data? 6.) Can you mix up drives with different RPMs, manufacturers, space, etc., are there any disadvantages of doing this and what if one drive is faster than the other or bigger? Does it get limited to the smallest? 7.) Can you RAID together SSDs or SSDs with HDDs? 8.) Can I RAID a PCIE NVMe SSD with an M.2 interface with an ordinary SSD, HDD or a SATA SSD with an M.2 interface? 9.) Can you RAID CD drives, USBs, SD cards, external SSDs and HDDs, etc.? 10.) How many HDDs in RAID 0 are needed before it is faster than a single SSD, or can they be faster? 11.) Is there anything else that I should consider or any other interesting characteristics of RAIDs? 12.) Do you like answering questions?
I'm probably not going to answer all of these because TH-cam's mobile app sucks and my knowledge of RAID is pretty basic, but: RAID 0 stripes data across multiple drives. At the minimum you need two, but the maximum you can use depends on a variety of factors within your environment. More than two drives in a RAID 0 is usually (if not always) possible. In practice, however, there is almost _never_ a reason to want to stripe more than two drives together, because of the diminishing returns you get on drive performance. I don't have any hard numbers since speeds vary between models, interfaces, etc. but I would very seriously doubt that an HDD RAID 0 can ever approach the throughput of an average SSD. Meanwhile, adding more drives to a RAID 0 array exponentially increases the risk of losing all of your data, since you are basically adding more single points of failure to the array; so the cons of a large RAID 0 outweigh the pros. Most people who are using 3 or more drives in one array opt for RAID 5, 6, or possibly even a hybrid RAID type. Also, in any RAID configuration, your storage space is limited by the smallest drive. For the greatest amount of efficiency, every drive should be the same size (don't know about rotational speed, but you probably want those to match as well). Outside of that, mixing brands, models, etc. doesn't really make a difference. For example, if you had a 750GB drive and a 1TB drive in a RAID 0, you'd have 1.5 TB of storage. The extra 250 gigs on the larger drive would essentially be wasted.
continued: Hardware and software RAID are pretty self-explanatory. Hardware RAID uses a physical PCIe RAID controller, while software RAID uses software to create and manage arrays. An example of software RAID is mdadm in most Linux distros. Software RAID is cheaper, while hardware RAID can do some operations like repairing an array more quickly (which is especially useful in RAID 5 or 6). I believe each option has other advantages that I don't recall, as well. Creating a RAID from drives requires the drives to be wiped, so you can't just have a drive with existing data and programs on it and decide you want to use RAID with it to keep the data safe, unless of course that data is already backed up to a disk that you aren't adding to a RAID.
Raid 1 does impact performance. Write performance is equivalent to the slower of the the two drives for the particular write operation (even two drives with identical model numbers will not perform identically). Read operations are the sum of the performance of the two drives (when the controller optimizes for this). Since the data is present on both disks, it only needs to be read from one. If multiple reads are occurring, they may occur in parallel. This all applies for 3, 4, and more drives with suitable adjustments to the calculations: slowest drive limits write performance, read performance is the sum of all drives performance (theoretical maximum of n times can where n is the number of drives).
***** oh I was just curious as to which purpose each served.. so the internal drive is your backup drive for making backups of the 3 striped SSDs? I'm still trying to learn how these different raids work.
I have read that for a raid with multiple hard drives next to each other, you should only use NAS or Enterprise hard drives as they have vibration detection. Because cheap hard disks without vibration detection are actually only intended to be alone in the PC case or individually in an external case.
Techquickie you left out the fact that depending on drivers, firmware, and components used that RAID 1 does have the potential to increase data read speeds. It may (will) not be as much of a performance boost as RAID 0, but it's still possible to get more performance than a single drive. Not knocking you Linus or anyone at LMG. Working my way through all 3,015 videos (across all 3 channels). Enjoy all the vids, tuts, etc. ----- For anyone interested, it will take about 122-135 days at 4 hours per day to watch EVERY video from LinusTechTips, Techquickie, and ChannelSuperFun. Days 123-135 take into account for new videos released over that time period.
This guy is great, I am a big fan. The acronym RAID should just stand for Redundant Array of Independent disks (RAID) as the word "Inexpensive" is subjective as I wish flash storage was inexpensive. Although I agree that you can cluster inexpesnive disks together, a cheap solution could be costly.
it actually stands for 'redundant array of INDEPENDENT discs' and has nothing to do with the price of said discs Mr Linus sir! i am sure that everything pc-wise is inexpensive for you, but that is not the case for the most of us!
Having watched loads of material about the Raid Array, not one of them , not one has pointed out the main feature of the technology. The Raid is about taking several smaller disk capacities and combining them into what appears to be, to the user, one large disk capacity. With the added features of speed and/or redundancy. This is why you keep hearing people say "you don't need Raid these days we have SSD". There has never been a greater need for Raid using SSD. Example, if you want a 200TB drive and not 20 x 10TB drives then you need Raid.
Thanks this video was just what I was looking for. I wasn't sure with RAID 1+0 if i would lose still have half the total capacity or 1/4. Now I understand with 4- 2TB drives in raid 1+0 I will have 4 GB of capacity.
I think this is the first video by LMG I have clicked on from a search with the intention of finding information. Every other time I tune in it's not as targeted, just "they probably posted something interesting, let's watch it."
linus you are a god. I am now an expert on raid after clicking on this video. I haven't even watched it yet, that's how good I know its going to be.cheers
I realize you made this video back in 2013 but would appreciate answering a query. Your explanation was short, clear, precise and to the point. My question: I have a SSD 2.5 and a slot for an extra MSATA SSD in my laptop. Would it be worth making a RAID 1 (as it seems the safest option) or stick to using the MSATA SSD just as a back-up storage. Thanks
By the sounds of this video, it looks like your best bet is to go with the raid one configuration! If you’re running a laptop, you will not be able to use the raid 10 configuration because it looks like that may be relegated to full-size PCs that have multiple bays for multiple dries. It looks like you need four independent drives in order to make a raid 10 configuration work. I have the same situation with an older Dell latitude E5540 that has a 2.5 inch Samsung SSD in the main drive bay and a MSATA card in the slot. Right now, I have the 2.5 inch as the primary boot Drive where the OS and programs are loaded. I formatted the MSATA card as another local storage Data disk. In my drives menu, it shows up as data: D. Looking at this video, it may have behooved me to go with a raid one configuration. However, Linus was not clear as to what happens to the 512 GB of storage that is on the Raid one disk. Right now I have about 800+ total gigabytes of storage. If I would blow the OS away and go through the Dell process to set up read it is not clear how much storage I would end up with after the operation is done. The question that I have is will my drives list only show a local disc C with the combined storage of both the 2.5 inch and the MSATA card or will it still show up as two independent drives with only cash relegated to the MSATA card. Questions questions questions!
in 1997 i read up on raid because i got some decommissioned pc's from Harrisburg state Capitol building, they were on there way to get smashed and my uncle was kind enough to grab 2 and some manuals for me. that was the first time i heard "redundant array of INEXPENSIVE disks". your the first one i ever heard call it like it is in a hardware referance book. A+
If I'm understanding correctly, the raid10 explanation is a bit incorrect. What looks to be described here is RAID 0+1 rather than RAID 10 (RAID 1+0). With RAID10, you're striping across 2 mirrors, and in RAID 0+1, you're mirroing across 2 stripes. Why does this matter? Well, you get better reliability with 10 copared to 01. With just 4 disks, there's not really a difference. But as you scale up to more and more disks, 01's reliability looks worse and worse compared to 10's.
if you ask me raid 1 is just as risky as raid 0. If you back up your data on a raid 0 you're fine, and you double your read/write speeds. With two identical drives in the same host environment in a raid 1, both drives are working all the time, so both should fail around the same time roughly, and what do you gain? a blue blanket sense of security. Whereas if you just do back ups, then the back up disk is only used during the back-up / restores. I'll take the extra speed over the blue blanket
What Linus described was RAID 0 + 1 not RAID 1 + 0 (10). There are a lot of benefits to striping mirrors rather than mirroring stripes. With RAID 0 + 1 if you loose a disk in each array, you loose the whole array because both stripes are broken arrays, with RAID 1 + 0 if you loose the same disks the array will still work because each of the mirrors still has a working drive in the stripe.
01:50 mmm not quite, if it happens that both drives which failed were holding the same mirrored data, you basically lost the data on all 4 drives :) you can "afford" losing "up to 2 drives" only if they're complementary to each other, i.e., they each hold the "other" half of what they need.
Seeking a good solution for ensuring no loss of family photos. Thinking RAID 1 in an external NAS - Synology. Didn't know if others had recommendations for photos that currently are being moved off iPhones to HDD on family computer HDD - has a secondary (non-OS) HDD for data storage.
Me 6 years later:
Still has to learn what RAID is..
LTT: Hello I am mini linus, im here to help :D
If you have a modern system you really don't need it. Remember, RAID 0 was invented way back when all there was were slow HDD. When SSDs came out a single one was many times faster than the fastest RAID HDD. Now that we have PCIe it is many times fast than that SSD and even RAID 0 SSD. Everybody wants more speed, but few user have application where they really need it. RAID 1 is certainly still valid.
@@krane15 Still need them in corporate / infrastructure side of things. Personally - probably not.
Krane
I thought the point of RAID was more about data integrity than speed. Only 1 option is speed focused, the rest are all about redundancy.
@@radicalxedward8047 Thee are many levels or RAID each with its own unique functions. Speed tends to be (at least used to be) the most sought after of those levels.
7 Years same thing. Simply didn´t need RAID till now. Thanks Linus for letting the old stuff online. I bet this video is still constantly clicked.
What about RAID: Shadow Legends?
Underrated comment.
LOL
/madlads
i literally came to make that comment
Lol😂😂😂😂
This kid's knowledgeable, professional, and very good at explaining things, he's going to go far, I wonder where he is now?
No longer CEO
@@Yellowredstone 😱No way!, REALLY?! 🙄🤦♂
@@Pay-No-Mind If you hadn't already learned, he's still owner and a big part and contributor to videos of LMG, but he hired a CEO to take care of CEO things.
@@jtadevich My dude, it was a joke 😅
@@Pay-No-Mind That's fine. The beginning of my response take care of it all then. 😄 Have a good one my dude. 😁
I just realized RAID 10 means RAID 1+0 not actually 10 as in the Roman X
+Bloodstainer yeah, me too
+Bloodstainer It means 2 in binary form, RAID 0, RAID 1 and RAID 2
Siddharth Nair No dude.. there is a setup called raid 2. Its just that raid 2, 3 & 4 aren't used as much.
Bloodstainer Lol, sorry, this the first video I've ever seen concerning RAID
RAID 2 exists but is basically obsolete because it uses its redundancy disk as a source of ECC, which modern hard drives already have included. RAID 3 and 4 work like RAID 5 does in that they have 1 disk's worth of fault tolerance through parity, but they store all of the parity on one disk rather than distributing it across them all like RAID 5 does. This makes 3 & 4 much slower on certain read/write operations. Don't know if they're considered obsolete, but they are generally inferior to RAID 5 and are thus rarely used.
Thank you for that clear, concise explanation! I'm a photographer and people keep saying I need a separate RAID set up to back up my files, but no one actually explained what that was in a simple manner. This was very helpful.
imagine telling this guy that some day he would have a beard
Whaaaa? He does???
@@selenabostick5844 check his latest videos on Linus tech tips
69th like
At the age of 31
having a beard for most guys has more to do with not wanting to shave, not testosterone.
With SSDs, it's RAED
Redundant Array of "Expensive Dies"
Still sounds the same though :P
Suraj Sharma
lol
haha honestly
it's actually independant not inexpensive. because those WD reds are expensive, and most people use ironwolf pro's
@@bradster2214 was gonna say the same thing but you overcame me
8 years later im still using this video to explain raid to new level 1 techs its a wonderful teaching tool
gonna have to have a raid 1 system to keep my por.... i mean school documents
Hahahahahahahaha YES! I have to back up my po.... family memories quiet often but I prefer to back up most things on a NAS or portable drive, something so that if I need it urgently in another location I can have it there without the need of a desktop since I often use a laptop in different locations also. NAS/P drives are a bit more costly though whereas 1TB could be 40-50 dollars for internal, a pdrive could be 70-80... and an internal drive of 4tb is roughly 150-170, but a pdrive is roughly 180-250.
***** yes, yes it is. been working really hard on school :))
Heheh +1 to ya buddy. I store my goodies on my Synology NAS drives, easy to pick up and run for it if they come knocking.
C Porter
LOL, when do you need por...Family Memories UGENTLY in another location? LOLL, ''oh shii old lady walked in on me in the computer room, i better take this situation to the laptop and the bathroom'' LMAO. This made my day man. loll
Nighthawke70
When who comes knocking??? Why is that a worry, do you have Pre-School Documents??? haha
RAID 0
RAID 1
RAID 10
RAID: SHADOW LEGENDS
oh god...
show that one coming
RAID: GARBAGE LEGENDS 🤣
"speaking of RAID..."
Hotel: Trivago
This just helped me simplify learning RAID for my CompTIA A+ certification, I needed this👌
I thought they changed the meaning of RAID a while ago from "inexpensive" to "Independent" since they don't have to be inexpensive.
They did but I like the first one best
+retrogamefox independant wouldn't be the right word because in a RAID 0 there is no independent drive, i think independant nor inexpensive is correct, but in general people would only raid drives if they are affordable otherwise they would stick with one drive and the price of SSD's is continuing to drop so I prefer inexpensive as well.
i would say independent over inexpensive as well because price points on disks change based on a number of factors and "expensive" is a very relative term to who is doing the purchasing, whereas "independent" would make far more sense with the though that you have X number of independent disks working together/in groups. depending on the raid level, not even all the disks manage the same function, just in the same grouping.
I always thought it was "interdependent disks" because they relied on each other but hey 5 years have passed. And I'm 5 years older now 😂
FINALLY!!! A VERY USEFUL INFORMATIVE INFO VID WITHOUT A LONG INTRO,SPECIAL EFFECTS AND CHATTER ABOUT NOTHING TO DO WITH TOPIC!...THANKS
You're the man Linus.
Keep it up.
Thanks again. Haven't had to set up a system with redundancy, but a 3 minute video was exactly what I needed. Nothing more and nothing less. 100
Buys 6 hdds and configures a raid0 setup...
Disk fails
Buys 6 HDDs and configures RAID1 setup...
All disks fail
Orders 6 10,000rpm 4tb hdds and plans to configure raid 1 setup...
...
...
Package lost in transit
JessLe- Berry lols
JessLe- Berry Buys a 4 TB SSD's
...
Eats them
Orders 6 2Tb - SATA6 hdd's...
no SATA6 on moboad
There's nothing better than when I get to watch a Linus video as part of my "study" for a Computer Architecture Exam :D
Linus man, I gotta thank you for all your help in helping me learn about components and similar things. I'm building my very first PC (currently have an Alienware :( ) later this year, and couldn't have done it without you man!
OMG! Raid 10 = 1 + 0 It makes so much sense now :D
My life will never be the same again...
It's sometimes referred to as 1+0 as well.
Maybe I shouldn't say this cause I'm gona look stupid but... Dr Barnabus I couldn't work out were the ten came from. Need to lay off the pain killers me thinks...you completed my life for this evening lol thanks. :)
Or just raid one zero for my binary bros out there
I'm Taking PC Repair and understanding almost everything (becuase of ltt and ncixtt) butt RAID and im so glad you have something like this. The only reason im going to get A+ certified is because of you guys and I legimently want to thank you so much.
Linus, not sure how this video came up in my search que but woe it is an amazing video. Even looking back on how you produced videos you had such a passion regardless of what is going on around you; Its simple, pure and directed. The honesty shines through to this day. You have lead me to build 12 computers and all of them posted even if me and the builders were not in the clearest of heads. and yet this video stil rings true as if it were almost the ultimate PC building guide
7 years later: still helpful
RAID: Redundant Array of "Independent" Disks
It means both...
It does mean both, the naming convention converted over to independent at some point in time, not really sure when though
Marius Tancredi Ha! Inexpensive. Lol. How come SSDs are cheap. I doubt Intel X25-E is cheap, for a gigabyte I could eat... for a full day. Even a full week if I (am dedicated) want.
thats what i thought
Originally it was "inexpensive". Now independent has been used.
Tom Riddle: "Can you only RAID 0 the data once? For instance, isn't seven..."
Professor Slughorn: "Seven! Merlin's beard Tom! Isn't it bad enough to consider splitting one drive? To rip the data into seven pieces... This is all hypothetical, isn't it, Tom? All academic?"
Tom Riddle:
[Smiling] Of course, sir. It'll be our little secret."
two errors:
1. minor mistake about raid 1: raid 1 gives you more read performance and IOPS.
2. huge mistake about raid 10: what you descried in the video (stripe between the two disks, and mirror the strips groups) is raid 0+1, or mirror of stripes. raid 10 is actually strips of mirror. it doesn't make much difference in a setup of 4 disks (since, well, you only get 2 groups and each group only get 2 members) but if you have say 6 disks, raid 0+1 will separate those disks in two raid 0 groups (3 each), and stripe between the 3 disks, whereas raid 10 will separate disks in 3 groups, each groups contain a mirrored (raid 1) disks, and data strips between groups. while you MAY loss up to half of the disks in raid 10 (vs 2 in raid 01) can still recover, your fault tolerance is really only one disk.
reliability wise , raid 10 is better than raid 01, but they are nothing compared to RAID 6..
Is RAID 6 better than RAID 10
I would like to inform you that your videos on RAID is being used as education material on ZBC in Denmark
I FINALLY GET RAID10!
+ingaman but why? u running a server?
+TheBigchekka No, I just never understood the concept until Linus explained it. But now that I understand it, I find it difficult to explain why I didn't understand it before.
+ingaman oh now i understand what you mean with "get" ^^ sry
I read that you finally got laid...
ingaman it isnt "10" it really is nested raid 1 and 0
Here 10 years later waiting for the annotation and link for the video on the other RAID types you mentioned.
Is interesting to see how much Linus and the Fast As Possible has changed over the last 3 years.
+YTN3rd right? same thought
omg, this video so much better than the newer Techquickie releases. Stright to the point, only 3 minutes and the idea is fully transmitted.
So happy to have found this video! This was exactly what I was looking to understand. I think i'm going with a RAID 1 in my new build.
I needed to learn what raid was, and instinctively types "Linus Raid" in youtube. 7 years old but still great information. I hope you're feeling better!
Clear, concise short into the point, thank you, excellent refresher!
could you do a raid 0 on two ssd's, and back it up all the data on a single hdd?
Wowthatsfail lel u mad breh
Yes that is the most ideal use of Raid 0. Though you will still get better performance and speeds from a M.2 SSD
I needed this info 10 years after uploading, Thanks Young Linus
all linus videos are awsome.:D
You can raid 10 2 SSDs for speed and 1 HDD for redundancy, right? Also would the SSD array be bottle necked by the HDD mirroring that array?
I think you'd need 4 drives but I would not mix SSD and HDD personally. I would make the SSDs into a RAID 0 array and then have some other backup solution to back up the SSD array to the HDD.
Just my opinion though. You may not notice a huge bottleneck but I would expect it.
Has the acronym been changed to Redundant Array of Independent Disks?
What was he on about with the 'inexpensive raid card' solution @ 2:04?
Linus, before puberty.....
Studying for my CompTIA A+ exam and just as I'm struggling with RAID concepts Linus saves the day.
RAID 1 + RAID 0 = RAID 10 OH i get it now! Its funny! :D
Great Video! My Qs are..
1. When RAIDING, is it recommend to have the drive be as close in manufacturing, storage space, and type (SSD w/ SSD, or SSD w/ HD) similarity as possible?
2. If my only intention was to have the drives have two separate OS(s) (i.e. Windows and Maverick); would RAIDING still benefit my needs?
3. What is the failure rate when considering any and all factors? Drive space, total use, and drive type?
thank you
Sticking with my ultra slow 320GB single hard drive.
U upgrade yet?
U upgrade yet?
U upgrade yet?
U upgrade yet?
U upgrade yet?
Thank you very much Linus, we have this in our exams and you helped clear it up. I was literally taking notes while you went on explaining about the RAID setups. Again, thank you very much.
Why does his head always look big in old videos?
Thanks for the info. Quick and easy to digest.
On a side note, @ 2:43, the host reminds me a little of Jim Carrey.
So that's why you have all those hoop earings. You're not gay but smart. Its a raid setup. If you lose one or two you got backups.if you lose three tho, you're screwed and will look kinda straight with just one earing
💀
+christopher jones O fuck me... I read this, scrolled back up and realized I hadn't even noticed all his 'cranium accessories,' then I laugh way too hard and long. Such a great comment.
ajajajajajajajaja thans man
he's married and has at least one child...
What is being "married and has at least one child" supposed to mean?
I really like the invite to link to it on a website lol reminds of the good old days! you guys were pushing every avenue you could I guess and I appreciate that!
"NCUneXt time". Are you trying to brainwash us, Linus?
Love your videos. One minor correction: You're correct that RAID 1 gives you no increase in write performance, but it does (theoretically) give you double the read speed due to the controller reading interchangeably between the two disks. I say theoretical because I can't say for sure that all RAID controllers operate in this way or that you'd get the full double performance, but you will get faster read speeds with a mirrored setup than with a single drive.
thanks for this comment, I had rewatched the video 3 times and was still confused. As i'd thought i'd read somewhere and it also seemed logical, that if the data was stored across 2 drives, that you'd be able to read it quickker
2:43 Hey Vsauce Linus here
1.) Does RAID 0, for example, describe the idea of striping data across multiple drives or striping the data across two drives?
2.) If the former, how many drives can be in RAID 0 and what limits my ability to do this?
3.) What is a hardware array and a software array and the advantages of one over the other?
4.) Can you setup a hardware and software array after you install the OS and install programs? RAID 0 stripes the data, so what goes on if you already have an OS and data? Can it just take bits of the first drive and add it to the second in some process and run it as normal without having to delete data or reinstall the OS?
5.) In any case, do you have the choice of setting up a hardware or software array before or after installation of the OS and data?
6.) Can you mix up drives with different RPMs, manufacturers, space, etc., are there any disadvantages of doing this and what if one drive is faster than the other or bigger? Does it get limited to the smallest?
7.) Can you RAID together SSDs or SSDs with HDDs?
8.) Can I RAID a PCIE NVMe SSD with an M.2 interface with an ordinary SSD, HDD or a SATA SSD with an M.2 interface?
9.) Can you RAID CD drives, USBs, SD cards, external SSDs and HDDs, etc.?
10.) How many HDDs in RAID 0 are needed before it is faster than a single SSD, or can they be faster?
11.) Is there anything else that I should consider or any other interesting characteristics of RAIDs?
12.) Do you like answering questions?
The formatting was lost, sorry.
I'm probably not going to answer all of these because TH-cam's mobile app sucks and my knowledge of RAID is pretty basic, but:
RAID 0 stripes data across multiple drives. At the minimum you need two, but the maximum you can use depends on a variety of factors within your environment. More than two drives in a RAID 0 is usually (if not always) possible. In practice, however, there is almost _never_ a reason to want to stripe more than two drives together, because of the diminishing returns you get on drive performance. I don't have any hard numbers since speeds vary between models, interfaces, etc. but I would very seriously doubt that an HDD RAID 0 can ever approach the throughput of an average SSD. Meanwhile, adding more drives to a RAID 0 array exponentially increases the risk of losing all of your data, since you are basically adding more single points of failure to the array; so the cons of a large RAID 0 outweigh the pros. Most people who are using 3 or more drives in one array opt for RAID 5, 6, or possibly even a hybrid RAID type.
Also, in any RAID configuration, your storage space is limited by the smallest drive. For the greatest amount of efficiency, every drive should be the same size (don't know about rotational speed, but you probably want those to match as well). Outside of that, mixing brands, models, etc. doesn't really make a difference. For example, if you had a 750GB drive and a 1TB drive in a RAID 0, you'd have 1.5 TB of storage. The extra 250 gigs on the larger drive would essentially be wasted.
continued:
Hardware and software RAID are pretty self-explanatory. Hardware RAID uses a physical PCIe RAID controller, while software RAID uses software to create and manage arrays. An example of software RAID is mdadm in most Linux distros. Software RAID is cheaper, while hardware RAID can do some operations like repairing an array more quickly (which is especially useful in RAID 5 or 6). I believe each option has other advantages that I don't recall, as well.
Creating a RAID from drives requires the drives to be wiped, so you can't just have a drive with existing data and programs on it and decide you want to use RAID with it to keep the data safe, unless of course that data is already backed up to a disk that you aren't adding to a RAID.
I was taught that RAID stood for Redundant Array of Independent Devices, not Inexpensive Drives...
+Alex Hawkyard The original acronym is "Inexpensive disks", but it has over time changed to "Independent disks", according to Wikipedia :)
Raid 1 does impact performance. Write performance is equivalent to the slower of the the two drives for the particular write operation (even two drives with identical model numbers will not perform identically). Read operations are the sum of the performance of the two drives (when the controller optimizes for this). Since the data is present on both disks, it only needs to be read from one. If multiple reads are occurring, they may occur in parallel. This all applies for 3, 4, and more drives with suitable adjustments to the calculations: slowest drive limits write performance, read performance is the sum of all drives performance (theoretical maximum of n times can where n is the number of drives).
what if RAID 0 + CLOUD STORAGE? win win deal?
yeah i was gonna do that haha
Fintan 3 ssd and 1 tb ? What setup is that? Using 1 non ssd ?
***** oh I was just curious as to which purpose each served.. so the internal drive is your backup drive for making backups of the 3 striped SSDs? I'm still trying to learn how these different raids work.
I have read that for a raid with multiple hard drives next to each other, you should only use NAS or Enterprise hard drives as they have vibration detection. Because cheap hard disks without vibration detection are actually only intended to be alone in the PC case or individually in an external case.
watching this to understand the new LTT episode where they lost their data...!!
Amazing how your videos have been more professional over the time, but they are useful still. Greetings.
Redundant, array, of (inexpensive) *independent*, disks
2:53 was that a thing back then? Including youtube videos form other people on your own website?
I'm pretty sure Raid 10 is pronounced "Raid one zero"
Techquickie you left out the fact that depending on drivers, firmware, and components used that RAID 1 does have the potential to increase data read speeds. It may (will) not be as much of a performance boost as RAID 0, but it's still possible to get more performance than a single drive. Not knocking you Linus or anyone at LMG. Working my way through all 3,015 videos (across all 3 channels). Enjoy all the vids, tuts, etc.
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For anyone interested, it will take about 122-135 days at 4 hours per day to watch EVERY video from LinusTechTips, Techquickie, and ChannelSuperFun. Days 123-135 take into account for new videos released over that time period.
No sponsor ?!
Thanks for the simple and quick explanation on RAID-1 vs RAID-10. Great visual illustration!
huh, no tunnelbear?
This guy is great, I am a big fan. The acronym RAID should just stand for Redundant Array of Independent disks (RAID) as the word "Inexpensive" is subjective as I wish flash storage was inexpensive. Although I agree that you can cluster inexpesnive disks together, a cheap solution could be costly.
it actually stands for 'redundant array of INDEPENDENT discs' and has nothing to do with the price of said discs Mr Linus sir! i am sure that everything pc-wise is inexpensive for you, but that is not the case for the most of us!
+Doc Lex You're both right. From wiki: "RAID (originally redundant array of inexpensive disks, now commonly redundant array of independent disks)"
Look how the channel grew. Its Beautiful
2:43 lmao wtf linus xDD
Divine Gaming 2019 wtf
0:59 Does that mean you could use the speed of an ssd onto the storage of a hdd?
raid 0 = 0
raid 1 = 1
raid 10=2
Binary too strong!
Having watched loads of material about the Raid Array, not one of them , not one has pointed out the main feature of the technology. The Raid is about taking several smaller disk capacities and combining them into what appears to be, to the user, one large disk capacity. With the added features of speed and/or redundancy.
This is why you keep hearing people say "you don't need Raid these days we have SSD". There has never been a greater need for Raid using SSD. Example, if you want a 200TB drive and not 20 x 10TB drives then you need Raid.
Who's this child?
Thanks this video was just what I was looking for. I wasn't sure with RAID 1+0 if i would lose still have half the total capacity or 1/4. Now I understand with 4- 2TB drives in raid 1+0 I will have 4 GB of capacity.
3 years later and linus is still the best
I think this is the first video by LMG I have clicked on from a search with the intention of finding information. Every other time I tune in it's not as targeted, just "they probably posted something interesting, let's watch it."
This video is very helpful. This kid is going places might not here on youtube but places.
I really like this guy. I just wish he had a video that would show a step by step guide on how to set up raids
10 years ago wow. I've been watching Linus for 7 ish years
That was fastest way that i understood RAID, you are awesome..
linus you are a god. I am now an expert on raid after clicking on this video. I haven't even watched it yet, that's how good I know its going to be.cheers
I realize you made this video back in 2013 but would appreciate answering a query. Your explanation was short, clear, precise and to the point. My question: I have a SSD 2.5 and a slot for an extra MSATA SSD in my laptop. Would it be worth making a RAID 1 (as it seems the safest option) or stick to using the MSATA SSD just as a back-up storage. Thanks
By the sounds of this video, it looks like your best bet is to go with the raid one configuration! If you’re running a laptop, you will not be able to use the raid 10 configuration because it looks like that may be relegated to full-size PCs that have multiple bays for multiple dries. It looks like you need four independent drives in order to make a raid 10 configuration work. I have the same situation with an older Dell latitude E5540 that has a 2.5 inch Samsung SSD in the main drive bay and a MSATA card in the slot. Right now, I have the 2.5 inch as the primary boot Drive where the OS and programs are loaded. I formatted the MSATA card as another local storage Data disk. In my drives menu, it shows up as data: D. Looking at this video, it may have behooved me to go with a raid one configuration. However, Linus was not clear as to what happens to the 512 GB of storage that is on the Raid one disk. Right now I have about 800+ total gigabytes of storage. If I would blow the OS away and go through the Dell process to set up read it is not clear how much storage I would end up with after the operation is done. The question that I have is will my drives list only show a local disc C with the combined storage of both the 2.5 inch and the MSATA card or will it still show up as two independent drives with only cash relegated to the MSATA card. Questions questions questions!
On second 0:16 its redundant array of independent disks because what may be expensive to me may not be expensive to you
in 1997 i read up on raid because i got some decommissioned pc's from Harrisburg state Capitol building, they were on there way to get smashed and my uncle was kind enough to grab 2 and some manuals for me. that was the first time i heard "redundant array of INEXPENSIVE disks". your the first one i ever heard call it like it is in a hardware referance book. A+
That was wicked best and easiest to understand explanation!
Thanks for a video that's direct and clear. Solid explanation, graphic, and scope. Cheers
2:10 There'll be an annotation when that happens
Waiting for it Linus please
daddy linus pls
If I'm understanding correctly, the raid10 explanation is a bit incorrect. What looks to be described here is RAID 0+1 rather than RAID 10 (RAID 1+0). With RAID10, you're striping across 2 mirrors, and in RAID 0+1, you're mirroing across 2 stripes. Why does this matter? Well, you get better reliability with 10 copared to 01. With just 4 disks, there's not really a difference. But as you scale up to more and more disks, 01's reliability looks worse and worse compared to 10's.
jeez....even that was a simple & fast explanation, i have to repeat several times to understand what that you have mention in this video >_
Finally! Raid explained, once again awesome Linus, thank you and cheers.
if you ask me raid 1 is just as risky as raid 0. If you back up your data on a raid 0 you're fine, and you double your read/write speeds. With two identical drives in the same host environment in a raid 1, both drives are working all the time, so both should fail around the same time roughly, and what do you gain? a blue blanket sense of security. Whereas if you just do back ups, then the back up disk is only used during the back-up / restores. I'll take the extra speed over the blue blanket
What Linus described was RAID 0 + 1 not RAID 1 + 0 (10). There are a lot of benefits to striping mirrors rather than mirroring stripes. With RAID 0 + 1 if you loose a disk in each array, you loose the whole array because both stripes are broken arrays, with RAID 1 + 0 if you loose the same disks the array will still work because each of the mirrors still has a working drive in the stripe.
At 2:12 it says there'll be an annotation for another RAID video, but if it was there before, it's not now, Thought you ought to know!
01:50 mmm not quite, if it happens that both drives which failed were holding the same mirrored data, you basically lost the data on all 4 drives :) you can "afford" losing "up to 2 drives" only if they're complementary to each other, i.e., they each hold the "other" half of what they need.
I am loving the succinctness of the presenter! Brava/o as the case my be. :)
My kinda learning video!
RAID actually means Redundant Array of INDEPENDENT Disks, originally called Inexpensive Disks, nice video BTW, Thanks!
why is this advertised as the latest techquicky video on the LTT forum?
Wondering how I go there too.
Back when techquickie was pure in its form, without all the shitty memes, references, and tangents, need more of this in videos
Seeking a good solution for ensuring no loss of family photos. Thinking RAID 1 in an external NAS - Synology. Didn't know if others had recommendations for photos that currently are being moved off iPhones to HDD on family computer HDD - has a secondary (non-OS) HDD for data storage.
Still useful 2023. Thanks Linus.