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.
Sounds like it kicked down from USB2 to USB1 speed. I just had this happen recently with 2 WD20EADS HDs. I switched to a different brand enclosure (Rosewill) and my speed returned. You could try that.
I have a Kingwin 2.5", 3.5" and SATA combo device that allows me to power up and connect any external drive and plug it in via USB. That was the first thing I tried, but I get the same results.
Actually, I’ve been copying files off of the drive, and the slowest sustained transfer rate was 32KB/sec… far below even USB 1.1 speeds. It’s around 98KB/sec sustained as I’m writing this post.
Is it possible that the on-drive cache has blown up? I just re-ran the WD Data Lifeguard Tools, which normally shows the drive as “PASS” with a green checkmark, but now gives “FAIL” and says it cannot read the drive’s SMART information.
It sounds like the drive is dying badly, and I have limited time until it goes into “clicky death” forever, but the drive is less than 2 years old, and I’ve easily doubled the total run time just in the last week now that I’m trying to back up the data from it (due to its horrible slowness). WD refuses to warranty a drive that was purchased by any OEM, regardless of age.
Sounds like it’s dying. Transfer as much of the data off of it that you can. Drives can die at any time. WD is only warrantying these drives for 2 years now. I had a batch of 500Gbs that died on me from 6-18 months. I had to take the remaining ones out of service because I didn’t trust them anymore. If it dies on you completely, you can try pressing on the motherboard and the connector underneath the drive. Someone wrote on this forum that that worked for him. Some people have had success freezing the drive (put it in a Ziplok bag first and get all the air out). I’ve never tried it. But it sounds bad.
