Poor SSD Drive performance


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Hi,

I have a Kingston SV200S3128G SDD drive and, although it is faster than any of my other mechanical drives, I feel it is still a tad slow compared to other drives I've seen.

Also, I'm getting a weird result when running Blackmagic's Disk Speed Test program as it shows that the drive's can write faster than it can read, which makes no sense.

post-74465-0-07949800-1358489397.png

The drive is connected to an on-board Marvell 91xx controller (6Gb)

The motherboard is an Asus Rampage Extreme III

And, I'm running Windows 7 x64

I have tried both, the default Windows' drivers for the controller as those provided at Asus' web site.

Anyone has any idea of what may be happening?

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Thanks for the link Aletheia.

Well, you could say it gives "better" results but I was expecting a better reading performance.

post-74465-0-99678600-1358492476.png

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The Marvell ports are rubbish. I tried my Samsung 830 drive on the Marvell ports on my motherboard and got barely above my native SATA2 speeds.

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I have been reading some posts at oher forums and it looks like the problem is that the controller is connected via PCI-e 1X, instead of PCI-e 2X.

So, I guess there's nothing that can be done...

I will, however, try the SATA3 ports from the Intel controller. Although they are only 3Gb, some say have seen a considerable improvement.

I'll post back with some results tomorrow.

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You could try a firmware update?

I did check that the same day I noticed the performance issue, but my drive doesn't have the "E111008a" code printed on the label, on mine it sais "E120506a" so I guess it doesn't need the update...

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Looks normal to me... What kind of results were you expecting, and how does this compare the to reviews of your drive on similar setups?

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Well, my main concern was seeing that write speed was faster than the read speed but, it appears that after doing some more reasearch you are right: those values appear to fall inside the average for other owners of that particular Kingston drive.

I guess I was expecting/hoping to see ~350/400MB/s reading speed, seeing that the write speed was ~200/MBs

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Here're the results from Winsat which look quite similar to other users' benchmarks (a bit slower, though):

> Disk Sequential 64.0 Read 222.76 MB/s 7.4

> Disk Random 16.0 Read 140.85 MB/s 7.4

> Responsiveness: Average IO Rate 0.69 ms/IO 7.9

> Responsiveness: Grouped IOs 8.71 units 7.4

> Responsiveness: Long IOs 2.00 units 7.9

> Responsiveness: Overall 17.38 units 7.8

> Responsiveness: PenaltyFactor 0.0

> Disk Sequential 64.0 Write 214.60 MB/s 7.4

> Average Read Time with Sequential Writes 0.508 ms 7.9

> Latency: 95th Percentile 2.183 ms 7.5

> Latency: Maximum 18.907 ms 7.9

> Average Read Time with Random Writes 0.446 ms 7.9

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Well, my main concern was seeing that write speed was faster than the read speed but, it appears that after doing some more reasearch you are right: those values appear to fall inside the average for other owners of that particular Kingston drive.

I guess I was expecting/hoping to see ~350/400MB/s reading speed, seeing that the write speed was ~200/MBs

How old is it? Return it? Get something else, like a Crucial M4?

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That's normal. Speeds also decrease quite sharply once they get past half full too.

Also, advertised speeds that they sell at are only achievable in specific benchmarks and don't reflect real-life speeds, which is a giant con if you ask me.

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