[WPXperVideo id=242 ]hi and welcome to my Playhouse and today unruhe quest I’m going to be talking about rate 5 versus sh r which is soon ologies hyper drake and i’m going to be comparing it with raid 0 raid 5 and sh r will go into the table and we’ll play with some disks and I’ll be drawing on my piece of paper or Dave cat as it’s actually called the sh r is why do you use them these Synology boxes which I actually need to trade this one up you press the button until it says beep and then it turns off because I’ve made a backup of all my videos on this and I need to bring it home to put on my big Synology box at home let’s go to the table and talk some rate rate redundant array of independent disks when this was invented back in 1988 it was actually inexpensive disks I read that on Wikipedia and someone reminded me on page 2 what a PowerPoint show huh this is called dead gap raid 0 or also called striped that’s 2 disks I have two disks right here and how this works is you have your mp3 file why here is an mp3 file and you want to store this on a raid 0 so the foul goes there is some kind of a processor that sent this to a process of this can be let’s just put some Lakes on it CPU CP you this can be on the rate controller or it can be the computers processor the mp3 file goes in here and that decides we’re gonna split this up so half of it goes over here and half of it goes over here so there is half an mp3 here how do I draw that in him and not the entirety so half of the files here and over here is the other half and that’s three right so half here and half there and this is very fast because it just splits up the files and this is the simple way of looking at it it will actually go down to block level split it up every other 64k will go this way and the next 64k will go this way and so on so that is striped and it’s it’s rather simple but if we move on to raid 5 raid 5 is kind of the same thing we have a processor I’m just gonna okay not all the lakes are attached well that’s the CPU and the infantry file goes into the CPU and the CPU splits it up and says ok we’ll put some of it on some of it on this drive some of it on this Drive and then it will make a checksum and that will go to this drive we get the same thing we get apart here we get apart here and we get a part here and this part is just a checksum of what went into this should this one die then the file can be recovered from this checksum and that part of the data over here raid 5 does it does not mean that this disk is just the checksum always next time the next mp3 file put that here that will go here and that will go there and then the checksum will go here so this time this is the dot g1 and the file goes into these two and so on so the parity or the checksum it moves around between the three discs so every time it starts a new block the checksum will be on a different disk this is a rather good because if it disk dies let’s just say this one dies well the second mp3 file is is all there the first one it has to calculate so it’s not as much calculations going on here it only has to recover one of the two mp3 files that the other one is still all good and of course there’s the third mp3 file the checksum will be put here and the data will be put on the two other ones that’s a little deeper into how this works you normally you can set the the size of these blocks so a 3 megabyte mp3 file will be split up into blocks on the hard drive that can be anywhere from I don’t know how far it goes down to K up to 64 Kay’s pretty normal I’m not sure but it split up into smaller section and put on the hard drive so what is sh r well sh r is almost the same thing as rate five oh I forgot the D rate five stands for soon ology hybrid rate and it’s a software rate it’s not a controller it’s not a hardware controller that does the calculation this is done through software and the first and most important thing is that the other rate systems made rate on full disks but here we have the three disks and that’s represented this way this could be one terabyte disks each right and that would be the way that that it sees the rate system on the disk level on SH are it still sees disks but it splits up the disks into sections if I have a one terabyte disk here it will divide this disk into three disks so one TB disk here but it will be divided into three disks kind of in this berries so we will have three hundred and 333 gigabytes on each of these disks right and the same thing it will do on the other ones now I’ve just drawn four of them because the Synology over here has four disks and this is smart because it’s not doing rate on the disks it’s doing rate on these partitions but it’s making sure to put these small partitions on different drives so when when I came come with my mp3 file here it will be put on this one it will be put on this one and it will be put on this one and there are BA there’ll be a checksum one of them will be a checksum let’s let’s see this one is the checksum on this one well the last one is is included as well three three three so the data will go onto these small sections and that’s no different from what raid 5 is actually it’s the same thing the brilliant thought of dividing it into these smaller sections inside the physical disk is that well let’s just we have to one terabytes all the way here but then if I came with a two terabyte well then it can be divided into more sections this is not smart in this configuration but let’s just see when it’s smart I hope you get this because right now we’re we have different sizes discs in a rate configuration and this is normally not spun so let’s see let’s get a blank piece of paper if you have four disks of one terabyte in a raid 5 right we will have 4 terabyte of storage space we will only be able to use 3 terabytes because one of the disks go out for the checksum so 4 times 1 TB but we get 3 TB of data right if we do this in a raid H oh Sh r we have the same thing it’s exactly the same we get 3 terabytes of data but if I go out and buy who page a came in three terabyte disk I want to put this in my array and I can do that I can from a raid 5 I can take out a disk let’s just take number 1 here take out one disk raid 5 will still only be able to use it as a one terabyte disk rate sh r will be able to use it as a three terabyte in this configuration it will not help us because we’re raid 5 the smallest disk sets the disk size in is H are the biggest disk is taken out for security so in this case it does not matter will be exactly the same configuration on both rates but if I take up one more of these disks and put in another 2 terabyte disk we will see a definite order picture we’ll have our I’ll just make it short our 5 and that’s 2 times 1 TB plus 2 times 3 TP equals the smallest disk in raid 5 is the one that decides to size so we will still only see 3 terabytes but in sh r we will have will have the same thing I don’t want to write this twice we have to take this the largest disk out for security so will just redraw one of these for our calculations then we had this left we actually get 5 terabytes of data with sh r so we have improved this by 2 terabytes and if I go exchange the next one with another 3 terabytes well we get 2 terabytes additional in that configuration to make this really apparent let’s go back and see say that we have this configuration 1 3 terabytes and 3 1 terabyte disks and let’s just say that paycheck was good so in in a rate configuration you can change one disk at the time so we go out and we buy 1 8 terabyte disk right that’s the Beast and right now when I change that 1 terabyte to an 8 terabyte the biggest disk is the security so that is redrawn from the from the calculation so right now we get five terabytes right away in if we’re just running raid 5 we only get 3 terabytes so already we are increasing this by 2 terabytes and that’s more this disks fault and if we go out and give another a terabyte disks which by the way is the biggest disk I know where that we can buy right now well it looks a lot different we have to redraw one of the 8 terabyte disks for security but now we are left with how much is that 12 terabytes of data and we get 12 terabytes of data in this configuration in SH our where we in raid 5 would only get 3 so let’s just okay with raid 5 we have the 3 terabyte the a terabyte and another a terabyte and the one terabyte but here in raid 5 the smallest disks makes the rules so these are all treated like one terabytes and that gives us a total of 3 terabytes wearing SH are we we have the three eight eight one and we have to redraw one of the disks because the biggest disks will use for the checksum and that brings us to 12 terabytes if we in raid 5 exchange 2 disks more to 8 terabytes we will get the maximum number also if we take this one and exchange it with a tree it will be able to see the entire array as 3 terabytes because these are bigger where it’s here the biggest disk that we have to take out for redundancy so in between configurations SHR is much appreciated because you get a lot more disk space in this configuration then in this configuration and this is all achieved by dividing the disks into smaller sections and doing rate for us the sections are the partitions on what you want to call it on the individual disks instead of just using the entire disk so it must be cheating somehow because this doesn’t add up right I think it’s it’s doing about five at some times and it’s making a mirror at some times and well it adds up being a lot more data anyway this is pretty much why I really like this analogy boxes so much because you get a lot more storage when you’re in between configurations and you can use a variety of disks not having to go out buying all new discs right down here let’s just see that I have a QNAP box that did it doesn’t do this this one is full of two terabytes disks and that really sets a limit to how much data I can have on that box because two terabytes you run out of this space eventually now I need more disk space I don’t want to go out and exchange all these two terabytes at once so I’m actually going to be bringing in another technology box here I’m going to be bringing in and for kind of same looks exactly like this one but a new one and that is able to to handle different disk sizes I can very fast get up to a bigger disk size than on this one by putting in some some different disk sizes and that’s a lot cheaper then going out and buying six new drives for this unit box so I hope you got something out of this video I know a lot of you want me to look at rate set and the set is F file system and and I will try and look into that I really do like to know just a little bit about it before I start yapping along so thank you for watching my videos to subscribe to my channel so that you can see me again and have every you nasty bye bye

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Q 1. Which of the Following Devices You Need Help With?

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