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[Official] Vertex 4 Owners Club - Page 33

post #321 of 411
@ invincible20xx lol all i did was put the drive in a benched it .. thats it on the norm it does over 450 read and write
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post #322 of 411
Quote:
Originally Posted by ucode View Post


That's an exceptional score for 128GB Vertex 4's in RAID 0, the 4K results particularly caught my attention. I was never quite able to get mine to 30MBs for 4K reads. Access times are also very low. The Vertex 4 is still the king of write speeds in some benchmarks.

I can see a couple reasons for your results hidden (in plain sight) in your screenshot, and I agree they work. Is that an OS volume? If so, extra good!

Adjusting the RAID 0 stripe size and another tweak can really change the results, trading one thing for another. For example, this is unusual for the Vertex 4 in RAID 0:

post #323 of 411
Quote:
Originally Posted by teh_HyDr0iD View Post

I have a quick question for some of you more experienced folk. I just installed a 256GB Vertex 4 over the weekend. I also have a much older 60GB Vertex 2. (Funny story, I paid almost as much for the Vertex 2 as I did now for my Vertex 4 tongue.gif) So as it stands I have my OS on the 60GB, Program Files on 256GB and I have 2x 500GB HDDs in RAID-0, all in my sig rig. From what I understand TRIM isn't supported in RAID mode (atleast not with my motherboard) so what I did was put my 500GB drives on the Intel controller in RAID mode (Blue ports in my case) and my 2 SSDs on the Marvell controller in AHCI mode.
This is how they benched.

Seeing how your Vertex 4s are benching is making me wonder if the marvel controller is holding it back at all? I have noticed you recommending against having an SSD on the Marvel controller. I also haven't updated the firmware yet which I really should do.
Now the system is fast, was fast even when I just had the 60GB in there, but I want to know if I'd be better off switching the 500GB drives to the Marvel controller and moving the SSDs to the Intel controller? Also, seeing some of you running 2 Vertex 4s in RAID is making me jealous. biggrin.gif

The Marvell SATA controller IS why your results are poor, it does not provide true SATA 6Gb/s speed. The dirty little secret that appears in the Marvell spec sheet for the 912x series controllers, is they can only be connected to one PCIe 2.0 lane, at 5Gb/s. That is not per SATA port, but shared between two ports. Imagine running RAID on that controller with SSDs. If you can adjust the PCIe clock speed to the correct buss, you can get some additional speed out of the Marvell chip, but it will never match the new Intel SATA 6Gb/s chipsets.

It is such a shame that the X58 and P55 platforms do not have the SATA 6Gb/s interface that Intel first provided on their 6 series chipsets. You (and me) and many others have discovered the truth about the Marvell "SATA 6Gb/s" interface, that isn't.

I don't know if Marvell uses the same RAID format that Intel does (the SNIA DDF standard), so just switching your RAID volume to the Marvell port in RAID mode might not work, or perhaps corrupt it.
post #324 of 411
Quote:
Originally Posted by parsec View Post

That's an exceptional score for 128GB Vertex 4's in RAID 0, the 4K results particularly caught my attention. I was never quite able to get mine to 30MBs for 4K reads. Access times are also very low. The Vertex 4 is still the king of write speeds in some benchmarks.
I can see a couple reasons for your results hidden (in plain sight) in your screenshot, and I agree they work. Is that an OS volume? If so, extra good!
Adjusting the RAID 0 stripe size and another tweak can really change the results, trading one thing for another. For example, this is unusual for the Vertex 4 in RAID 0:

i get 30 mb/s on the 4k on a single 128gb v4 so what's exceptional about this ?
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post #325 of 411
It's very common, if not a given that 4K read speed is reduced in a RAID 0 volume of SSDs. That is seen more with separate RAID cards and is their main drawback. The amount varies depending upon the SSD controller, usually worse with SandForce controllers. It also is worse when more than two SSDs are used in a RAID 0 volume.

I'm not questioning your result, it's good to see, but in my experience 4K read speed usually is reduced, and certainly never increases, compared to all other speeds. The change may only be between one and five MB/s, but given a single SSD at 30MB/s, 10% of that is 3MB/s, which I prefer not to lose. I've seen benchmarks of Samsung 840 Pro's in RAID 0 that have slightly lower 4K read speeds than a single 840 Pro does.
post #326 of 411
Quote:
Originally Posted by parsec View Post

Is that an OS volume?

Yes and no! I have the array volume partitioned and although the run was on a Windows partition, it was not the active one.


FYI regarding SS
  • 4k strip
  • Balanced power plan with C-states disabled
  • Write caching and battery backup enabled
  • RST 11.2 / OROM 11.6
  • No RST service running (driver only).
  • Run at 5GHz

I would not mind trying the 840 Pro's but maybe Samsung doesn't feel it's competitive enough to sell them where I live. frown.gif
Edited by ucode - 12/27/12 at 10:15pm
post #327 of 411
Hi guys,
Joined the club today and added a 512gb Vertex 4 alongside my 2 other vertex 3's.

post #328 of 411
just got mine put in, with a help from this guide: http://www.overclock.net/t/1156654/seans-windows-7-install-optimization-guide-for-ssds-hdds





I am extremely happy with system improvements i am experiencing biggrin.gif
Edited by xStark - 1/5/13 at 6:46am
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post #329 of 411
Here is mine:



Here is AS SSD Benchmark:

post #330 of 411
I'm already a member, but I got second drive recently. Terrible picture, but it shows my first drive (128GB, on the club list) and my new one (64GB, left):

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