I have 2 HP Personal Media Drives, both with the 2TB WD20EADS Caviar Green Drives. They were bought online together (in December 2010) and arrived on the same day.
Both drives would originally transfer data at 30+MB/s, whether connected externally, or within the drive bay designed for the Personal Media Drives.
Suddenly, one of the drives will not transfer data any faster than 3MB/s (<10% of its original speed), and frequently has UNBELIEVABLY slow performance. (See images below.) The slow drive has been used very rarely for system backups. (I mount the drive in the internal drive tray, conduct the backup, then remove the drive. MAYBE 500 hours of total run time.) The fast drive has been used whenever I’m not doing a backup to the slow drive.
Sometimes the drive is so slow to respond, it makes the system appear to have hard-locked, until I un-plug the drive between constant (and intermittent) activity. CPU Usage is negligible.
Does ANYONE know what causes this? I saw another post that recommended using wdidle3.exe; however, the WD site warns that it is only to be used on a certain range of drives, of which the WD20EADS is NOT listed.
ANY help is appreciated!
The image of the benchmark for the newly glacially slow drive.
Performance of the other drive, and what I expect from the slow drive with an identical setup.
Intel Core i7 920 (8x2.66GHz)
9GB DDR3 Ram
Windows Vista Home Premium 64bit
+all service packs, system updates, and current motherboard, video and sound card drivers.