HDD GURU FORUMS

Is it normal for this device to have such big discrepancies between read and write? Firmware up to date, everything installed and normal, it just doesn't want to work. Am i missing something ?

I have never bothered to familiarise myself with the numbers, as flash varies so much. but reading flash is always a lot quicker than writing. same with USB drives, SD Cards(these often have speeds on the labels/packaging). reading Flash is straightforward. reading and writing are different electronically, and operating system-wise in flash.

Would such a symptom be consistent with a drive that was running out of spare blocks?

Does the SMART report look OK?

It's brand new...no problems in SMART

can we have Crystaldiskinfo report ?

Hi, thank you for your input, but the problem has been solved. The client returned this item and exchange it.

Hello nicolae788

For this model of SSD,
A> You are getting quite good performance numbers.
B> for the lower capacity model (60GB) This is normal..

This is a generation 1 Sandforce SSD which uses Dynamic write compression, which means your write speed will vary depending on how compressible the data is that you write to it.

AS-SSD writes incompressible data for its benchmark stream and so you are looking at the worst case write scenario. (this is the performance you would get writing a large MP4 file or similar)

With compressible data (big txt files or documents) it could jump up to 150 / 200 MB/s

Unfortunately on the 60GB model you are bottle-necked by the fact that internally the drive only uses 2 write channels. the 120GB+ uses 4 and so the write performance increases exponentially.

hope this helps

Mark

Hi Mark,

Thank you very much for your information. It surely made some light on the subject, thank you very much, you are very kind. At least now i have something to relate to the data i received in AS SSD benchmark.

The subject SSD features in the following review:

http://www.tomshardware.com/reviews/ssd ... 137-5.html

Thank you very much @fzabkar. Interesting article.