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My SSD is not giving its promised performance - Page 2

post #11 of 16
Quote:
Originally Posted by adre View Post

Actually i read this guide and bought this SSD accordingly, as it is mentioning in the article as a "good SSD":

http://www.overclock.net/t/1179518/seans-ssd-buyers-guide-information-thread#user_SeansrecommendedSSDs

I'm not saying SandForce is bad. I've actually got a number of SandForce drives myself (including 4 SanDisk Extremes). Just saying you should be aware of its limitations.

From the guide you posted:
Quote:
SandForce drives weren't known to be the most reliable drives on the market due to many issues with their firmware and support. But, with the latest firmware issues have gone down drastically and since LSI has purchased SandForce there improvements in support.

I will help you understand which are better than the others. Here we are focusing on the NAND the drive uses and the type of data it will be handling. There are two types of data that your drive processes, they are compressible and incompressible. Depending on what you use your SSD for will help determine which SSD you want.

Compressible data - Data that can be compressed into a smaller size such as say a word document.

Incompressible - Data that can not be compressed into a smaller size such as say videos, music, and pictures.

Now for your operating system and programs and such you will have a mix of both types of data. Almost all data is compressible as well as incompressible to some degree. On average programs and the OS files are ~50% of each. So, it is beneficial to have a drive that handles compressible as well as incompressible data faster. You want a drive with Synchronous or Toggle NAND for the best performance, not Asynchronous. For a few dollars more, a SSD with Synchronous or Toggle NAND will likely deliver a much better experience. We are on Overclock.net, who doesn't want the fastest and best, especially for the same or better price?

Also, just to note, if you are benchmarking a SandForce SSD, make sure you know that the manufacturers use ATTO benchmark to get their advertised numbers. Othe benches like AS SSD will show lower write speeds due to the different type of incompressible data used for benching.
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post #12 of 16
you are seeing the performance difference of the sandforce ssd controller when tested with all non-compressible data. most other disk benchmark programs, such as atto, use compressible data, which the sandforce controller excels with. I would've suggested atto earlier, but I'm not used to thinking about sandforce ssd's being a samsung user. seems to me that your ssd is running correctly.
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post #13 of 16
Thread Starter 
rui-no-onna , JayKthnx : I understand well. Thank you both a lot!
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post #14 of 16
Your speeds are fine, its just that sandforce drives have inflated speed figures, because these only apply when you write or read compressable data.
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post #15 of 16
Nothing to worry about mate.

My vertex 3 is also powered by the same sandforce controller as yours. I get low write speeds (uncompressed data) aswell . Dont worry, rerun the crystaldiskmark test with 0 fill data and see.
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post #16 of 16
Thread Starter 
Quote:
Originally Posted by mulkman View Post

Nothing to worry about mate.

My vertex 3 is also powered by the same sandforce controller as yours. I get low write speeds (uncompressed data) aswell . Dont worry, rerun the crystaldiskmark test with 0 fill data and see.

Did as you said. Right, finally i see good results on Crystal mark.
Thanks!
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