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Best PCIe controller for fast (500MB/s+) SSD ?

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Hi guys,

I have 4x Vertex 3 MaxIOP drives here that I purchased to build a Raid 0 array. I bought a Highpoint HBA 2720 (6gb/s SATA3 / pcie x8) and thought this would be a done deal. Problem is, I can't get more than 350MB/s out of a single drive plugged into this controller. We should be seeing 550MB/s.

So I'm shopping for a new one. I've asked OCZ / LSI / Highpoint / etc which controller will actually deliver full SATA3 throughput on a single port. And basically, none of them will disclose this information. "It's sata3 compatible" they say. Right - and I have a truckload of "1000Mbit/s" network cards here to sell you... they'll only transfer at 600Mbit/s, but hey, who's counting! :rolleyes:

I'm doing the Raid in software, so I don't actually need a Raid card, just a pcie->sata3 card. I've heard that the P67 chipset is great, but new mobos are not an option. Can anyone help me out?

Thanks,

Daniel.

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We run drives through our LSI cards without any loss in throughput.

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We run drives through our LSI cards without any loss in throughput.

Thanks Brian. I've had a hard time finding benchmarks with individual drives. Can you be more specific re models? Do you know if the LSI Logic 9211-8i would be adequate?

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or buy some SLC drives and do not worry about anything. At least my 2 Foremay SLC (64 gb only) never degrade in performance.....no Cache on the drives, they are that good.

Here you can see what the drives perform on a ....... Adaptec 31205, not the greatest Raid Card ever. After 3 years of use, Trim not possible. Just ran Atto this week.

True LSI has great Sata-3 controllers, mine did get too hot actually....so i returned it.

Jeff

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hi Guys,

forgot to add: here you can see the cristalbench of both the Adaptech and LSI back in 04/30/2010.

So as you can see not much difference from what i just added half an hour ago.

Why? Well i add to search for the LSI results. (You can hardly believe what a 6gb Card Sata-3 can do with Sata-2 drives.

do not know if both files will be attached, anyway i will add the missing file from 04/30/2010

Jeff

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apparantly the file is too big......2,10mb instead of 2mb.....

my god.

anyway i managed to get it down to 1.93 mb thanks to PAINT. Hopefully it gets there

thanks

Jeff

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apparantly the file is too big......2,10mb instead of 2mb.....

my god.

anyway i managed to get it down to 1.93 mb thanks to PAINT. Hopefully it gets there

thanks

Jeff

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Another thing is the chipset: you didn't mention the motherboard

or chipset that you were using with the 2720.

Even though a PCI-E slot is x16 mechanical, the chipset may only

assign x4 "actual" lanes.

And, there is a 2x difference between PCI-E 2.0 and PCI-E 1.0.

Here are the raw numbers (fastest first):

x8 PCI-E 2.0 @ 500MBps = 4,000 MBps (500x8)

x4 PCI-E 2.0 @ 500MBps = 2,000 MBps (500x4)

x8 PCI-E 1.0 @ 250MBps = 2,000 MBps (250x8)

x4 PCI-E 1.0 @ 250MBps = 1,000 MBps (250x4)

These numbers are "Max Headroom".

PCI-E 3.0 should be very interesting, because it will

increase the clock rate to 8G and upgrade to a

128b/130b jumbo frame, instead of the obsolete

current 8b/10b frame during transmission.

As such, 8G / ~8 bits per byte = ~ 1.0 GB/second raw bandwidth per lane

(instead of dividing by 10 bits per byte). This eliminates ~20% overhead.

I've been suggesting to Highpoint and several other companies

that they begin the engineering required to extend this

130/128 jumbo frame over the SATA cables too!

The PCI-E SIG is working on something like this right now,

designed to compete head-on with LightPeak aka Thunderbolt.

p.s. Some reviewers have solved this chipset limitation

by swapping the video card and RAID controller,

so the RAID controller occupies the first PCI-E x16 slot.

RTFM (Read The "Fine" Manual -- not always "Fine" however :)

MRFS

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