Slow (delayed) response with Black Caviars

There is a 14-15 second delay when accessing any of the three 2TB Black Caviar drives in my system making working with them virtually impossible.  Anyone else is seeing that?

Drives: three WDC WD2001FASS-00U0B0, FW  purchased I believe in June 2010 (Ingram Micro)

OS: Windows 7 Pro 64-bit

System: HP Z800 BIOS 3.19, 15K SAS boot drive, 2P E5530, 18GB RAM

SATA controller(s): (1) onboard ICH10 SATA II in AHCI/RAID mode; (2) Marvell 91xx SATA III

Example 1: running AJA SystemTest 1.0 on the drive results in a 15-second delay before the benchmark actually starts.  This never happens on any other drive (and I’ve tested hundreds).  Subsequent runs within 5 minutes of the 1st run do NOT result in a delay.  Subsequent runs in 1 hour results in the same 15-second delay.  This happens on any of the three drives I have.

Example 2: using Picasa to scroll through hi-res images on one of the drives results in intermittent delays of 14-15 seconds (every few minutes or so).

Anyone else is seeing this?  If so, what was the resolution if any?



Run the Western Digital DLG tool, you can download this application from