SSD questions poor write speeds?

[DumbDumb]

Ok check the pic.. stupid high read speeds for a single drive but low overall write speeds? I did a fresh install of windows 7 and my write speeds dropped..

any ideas..

[Annie the Eagle]

Go into Speccy and see what HDD brands you have, if you want a portable copy so it doesn't install itself, go here: Speccy - Builds.

I will post my results which are using a Samsung 256 GB SSD.

[Annie the Eagle]

My results.

My read speeds are lower but my writes are faster. Seems weird.

[DumbDumb]

240GB INTEL SSDSC2CW240A ATA Device (SSD) and before I messed with it the write speeds were faster..

[Mr. Fox]

The problem is the new Intel drives use Sandforce controllers, so with incompressible data their performance is not so great. With compressible data they normally do well, but incompressible data is what most people need fast read/write speeds for more than compressible data. That's a hallmark trait of Sandforce-based SSD drives. Your numbers are similar, if not a little better, than the Agility 3 depending on file size. And, it appears your results are in line with their expected performance. Overall, I don't your number represent poor performance.

Have a look in this thread for more examples and SSD performance questions: HOW TO: SATA III-SSD-RAID0-Windows Installation: Questions, Troubleshooting Thread

As your Corsair SSD have a Sandforce controller, it will not offer the best performance available in an SSD, especially with incompressible data. Try running a CrystalDiskMark 500MB test with compressible and incompressible data and see how much difference there is in read/write performance. I suspect the results may be similar to the Agility 3. Below are test results with my own drives for comparison.



Compared to Crucial M4 128GB with Marvell Controller...

[SlimShady]

I had similar issues when I installed my Intel 520 Series 180GB into my M17........someone suggested using AS-SSD (I think that was the name) to format the SSD and straighten it up and that worked wonders. My speeds increased and balanced out nicely.

[DumbDumb]

could you post your speeds up?
for a base line

[SlimShady]

SSD Performance

You can find before and after speeds there. It was the Paragon Alignment Tool that I bought and used that solved my issue.

Hope that helps.

[deuceduzit]

Have I tried secure wipe with Linux os? Or pmagic bootable USB? It tends to restore performance.

Sent from my GT-N7000 using Tapatalk 2

[DumbDumb]

[QUOTE=deuceduzit;8800723]Have I tried secure wipe with Linux os? Or pmagic bootable USB? It tends to restore performance.

Sent from my GT-N7000 using Tapatalk 2[/qoute]

no from what i read it can make things worse.. so i used the windows install disk for every thing..

I did set the controller to ashi instead of ata in bios..