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so I promised to do a video update when I had a chance to run the eight ocz Onyx

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Series ssds in raid zero so you can see I've got these hooked up to an LSI Mega

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raade fast path SSD optimized RAID controller and uh

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what fast path does is it actually allows ssds to perform a little bit

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better so fast path is just the little uh the little key that I have on there

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it also enables some Advanced encryption features as well as the ability to use

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ssds as a cache for a hard drive uh rate

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array so that's a this is a pretty cool card this is the

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9260 and it's uh it's actually a SAS I

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did an unboxing of it it's a SAS 6 gbit per second card but as you can see it's

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obviously compatible with uh SATA 2 ssds

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I shouldn't even call it SATA 2 what I mean to say is SATA 3 GB per second so

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here I'll show you actually here why don't we take this video as an

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opportunity to show you how easy it is to set up a RAID controller card uh in a

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raid zero configuration so first of all I want to show you some benchmarks here

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you can see that with this array we were able to achieve uh almost 700 megabytes

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per second read which honestly shouldn't

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be that impressive this card is capable of well over 1 GB per second read with

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the right ssds so that I was actually a

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little bit disappointed in but the right speeds are very impressive the right

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scale scaled almost linearly on these ssds so we were able to achieve up to

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450 mb per on rights so I'll show you

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what I mean by all of this in just a moment here

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um this is kind of interesting I wasn't

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having any challenges with the uh with

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the raid configuration before or you know what I think it

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is well looks like you get to

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uh see some real time troubleshooting

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here I think we've just got the wrong IP address cuz I was using this at home so

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uh I have the the system IP wrong 192168

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3185 so let's just do

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that and there we go so let me just log in

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here all right and now we're going to go into the

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uh the mega raade configuration so the reason I'm a little bit disappointed

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with the with the overall read speeds is you can see with well you would were

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able to see you can see with a twood drive array so this is using all the

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same raid configuration uh we were able to achieve 307 megabytes per second

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already now with ssds typically with a good quality RAID controller like we

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have and uh and a good quality SSD you should see almost completely linear

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scaling so while these drives are rated for uh 125 mb per second reads uh

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maximum you can see with two drives we were actually seeing that these drives

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perform a little bit better than spec and they're scaling extremely well

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because only two drives yield such strong read results now the this down

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here is the random uh performance so you can see even with uh eight

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drives uh random performance doesn't change very much so we've only got about

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6,000 iops in 4k performance which is actually still very good compared to any

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hard drive I mean you got to sort of keep that in perspective but uh

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performance didn't really scale much from two drives all the way up to eight

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drives so you can see two drives we were seeing about 20 megabytes per second and

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then up to eight drives we see about 25 now with a deeper Q depth and a bigger

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array you do see more uh you do see better performance and what that means

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is that if you're multitasking a lot on a huge array like this you're going to

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see better performance and it will continue to scale versus if you're not

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multitasking and you're just uh reading and writing small 4K files now another

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thing that did scale really really well with adding more drives was the rights

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so you can see right iops are almost 3x

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when we add uh four times as many drives so that's still reasonably good scaling

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so I just want to show you the numbers as we go through here so remember this

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is uh eight drives this is the run I just did like two seconds ago and then

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this one here is with two drives so this is with four drives so you can see from

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2 to four did not scale nearly as well so back to to two up to four did not

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scale nearly as well in reads as from 1

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to two because from 1 to two we got almost linear

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scaling but you can see that especially rights scaled incredibly well so our

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sequential rights doubled actually a little bit more than doubled and then

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our 4K rights more than doubled so very

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very efficient there and so then from four drives I went to six drives so once

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again you see quite limited

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scaling in some areas but again excellent scaling on the sequential

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right so that's where we're seeing just just huge improvements and then finally

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this is an eight Drive run that I did before I I was using slightly better

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tweaked raid settings so that's probably actually the one I should be showing you

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more than more than any other one but uh but yeah that's how I was able to

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squeeze just a little bit more sequential readout of the whole thing

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and uh actually substantially better uh 4K random rights so anyway that was

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pretty much my video um I think that

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what we've discovered here is that using 8 ssds of uh very very low performance I

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mean the Onyx is a value SSD there's uh there's no two ways about it uh I think

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what we'd be better off with is using something like four to six higher

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performance ssds uh something like a Vertex 2 I mean vertex 2 right out of

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the box is going to outperform probably anywhere from 2 to to three of these

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Onyx ssds so what I discovered uh

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running this experiment is that you're probably better off with fewer ssds but

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higher performance ones so I'll just show you really quickly when you have a

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when you have a premium raid card like this how easy and how quick it is to set

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up a uh a raid array um all you really do is go into

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actually you know what no I can't show you this because I wanted to actually boot up to the uh to the SSD raid array

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so uh nope I can't wipe out my array but it's really fast you have to just

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believe me you click this button up here you select the drives you press raid

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zero and then there are actually some options that you can configure so if I

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go into my virtual drive here I believe I can go to Virtual Drive and I can s

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all the Virtual Drive properties so these are some of the things that that

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you can Tinker around with if you do set up an SSD raate array so I've set things

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up uh according to how LSI has recommended for the best fast Path

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Performance although some people do report better performance with no read

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ahead um and some people do get better

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performance with right back cach enabled as well as cash Dio it really varies

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depending on your SSD so you have to tweak and find out what works well with

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your controller and your SSD so thanks for checking out our little uh raid Zero

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Performance video don't forget to subscribe to lus Tech tips