Problem with Samsung 256gb SSD

Does anyone know of any problems with Samsung 256gb SSD's ?...

I bought one recently to add to my Sony AW notebook as a replacement to the existing D: drive (a Fujitsu 500gb drive).
After replacing this with the Samsung, I started the notebook (I'm running Windows 7 64bit), in Windows I ran fdisk to init and quick format the Samsung.

Now, Windows see's the disk (with approx 238 gb free).
I then ran ATTO benchmark and everything seems perfect at this point. It's reporting Write speeds of upto 200 Mb/s and Reads of 220 Mb/s.

Now, I start copying files from the C drive to the Samsung. This seems to be working fine for the first 3 minutes.
Then I start copying a third folder of files and the copying 'freezes'.
Eventually after a few minutes, I'm able to look in 'My Computer' but the D drive is now not visible

After a cold boot the D drive becomes visible in Windows again, reading files on it is ok. When I run ATTO benchmark on it, it now reports VERY SLOW Write speeds of upto 40 Mb/s.

Note: After having this problem, I got a replacement Samsung drive from the supplier and the 2nd Samsung is doing exactly the same (ie. freezing sometimes while copying files).

I've replaced the Samsung with the original Fujitsu drive and repeated the copying files operation exactly and the Fujitsu has no problems so I'm assuming this rules out the notebook and Windows 7 as causing the problem.

Any ideas would be appreciated.

 

Sir have you updated your BIOS?

 

I've gone into the BIOS and done a SAVE. The Samsung drive is listed at Boot up time, so its presumably been recognised by the BIOS. Unfortunately, Sony disables almost everything on the BIOS setup screens.
I'll check on the Sony support site to make sure I have the latest BIOS version, but it should be fairly up to date as the Notebook was new in March.

I'm wondering whether I should do a full format instead of the quick format?
I've read elsewhere that full formatting slows the ssd down, but there was no instructions with the drive that says not to.

 

do you have the latest firmware on your ssd?

 

The Firmware version of the Samsung is VBM180IQ date 3/May/2009.
I think this is the latest but I will double check.

 

I think there's some problem in SamSung SSD 256GB too, at first my SSD seem so fast with reading speed about 200MB/s, but after 6months now the reading benchmark is about 27MB/s although I reinstall new, clean OS + new drivers. I still find out why is it ....

 

Could be time to RMA it if read speeds have dropped from 200 to 27!