WD2001FASS: extremely poor performance for writes

New 2TB WD2001FASS, Windows 7

Read performance seems fine, but writes are awful.

HDTune file benchmark shows less than 10 Mb/sec. Screen shot is here:


Takes several hours to format 50Gb partition.

I expect performance as measured here:  http://bit.ly/dCLIbH and http://bit.ly/b1KNGb 

Windows driver configuration for the hd has checkmark next to “enable write caching for the device”.

I didn’t touch any jumpers. 

Please advise…