Fast SSD read but slow write

Hi,

I have a SSD where my Fedora 18 is booting from. It has the speed I would expect from it. But today I wrote a little test where I write a file with 1.5 GB to my HDD and my SSD. Surprisingly most of the time it took longer to write on the SSD then on the HDD. Not very much but it is recognisable.

Any ideas where to start searching the problem? The SATA-Controller should make 6GB/s, AHCI is activated and I know that I am on the correct disk. ;)

Thanks