SSD performance issue, or is it?

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pwhittak

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May 6, 2010
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Hi I currently have 3 crucial c300 256gb all running the latest firmware 0007. I am using them in raid 0 using a highpoint rocket raid 640. The card is a 4 x pci device and its in a 16 x slot with full bandwith. My issue is with 3 of these ssd's im only getting 580mb/s?? they state 355mb each and im getting 580mb for all 3?

I used to run 1 off my mobo and got 300mb so i exspectin perhaps 800 - 900mb/s

What can the issue be?

my motherboard is an msi bigbang xpower if it helps and the raid card is 6gb/s

Any ideas people because im out
 
Solution
Dereck47
The maximum data transfer rate of a SATA 2 port is 3Gb/s (300MB/s).
The maximum data transfer rate of a SATA 3 port is 6Gb/s (600MB/s).

Therefore the theoretical maximum Read/Write speed of your 3 SSDs in RAID-0 on a SATA 2 port is 900MB/s.

You stated that you were only getting up to 580MB/s with your RAID card.
It’s possible you may get better performance using your motherboard ports and the latest Intel RST drivers.
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JohnnyLucky

JohnnyLucky

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The Highpoint Rocket Raid 640 does fairly well with 2 solid state drives in a RAID array. It does not perform well when there are 3 or 4 ssd's in a RAID array. The 3rd and 4th ssd's seriously hamper the card's performance. It's well documented in technical reviews. :(
 
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Dereck47

Dereck47

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Sorry, but you wasted your money with that RAID card. The RocketRAID 640 uses the same Marvell 88SE9128 controller that's on your motherboard.

The Marvell 9128 controller uses only 1 PCIe lane at 5Gb/s; that's why you have such poor performance.
 
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JohnnyLucky

JohnnyLucky

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^5 +1 what Dereck47 said.

The Controller on the 640 is not that good. An excellent high end, high tech, RAID card that kicks butt will cost a lot more than an ssd. I always tell individuals the really good cards start at about $1,500.00. The inexpensive card Dereck47 mentioned is okay but I would not recommend it.
 
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Dereck47

Dereck47

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The maximum data transfer rate of a SATA 2 port is 3Gb/s (300MB/s).
The maximum data transfer rate of a SATA 3 port is 6Gb/s (600MB/s).

Therefore the theoretical maximum Read/Write speed of your 3 SSDs in RAID-0 on a SATA 2 port is 900MB/s.

You stated that you were only getting up to 580MB/s with your RAID card.
It’s possible you may get better performance using your motherboard ports and the latest Intel RST drivers.
 
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Solution
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pwhittak

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May 6, 2010
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Dereck good point, if it turns out better ill be both pissed off and happy. The raid card cost me £100

Jonny its just a hobby i play games and make my pc really good. Its worth over 7k at the moment
 
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