WD640AAKS read dropped to 3.5mb/s

[RyanF]

Read speed was at normal levels yesterday. Today, the drive speed using HDtach says average read speed is 3.5mb/s, cpu utilization at 40%, and access time at 12.6ms.

My other two WD250's run at normal speeds.
Abit IP35
C2D 6400 @2.8 w/ most recent bios

Is the drive toast?

 

[ksheets]

Have you trued running a harddrive scan from something like the Ultimate Boot CD (MHDD or some similar program)?

 

[RyanF]

I havent run a HD scan from my ultimate boot cd yet.
Just completed WD diagnostics tools, all passed.

Computer Management/Event Viewer/System Log gives me an atapi error on IDE port 2. 50% sure that is the port this HD is connected to.

Also, in the event viewer, there are quite a few errors titled "disc" with eventID 51. This is for another drive, that appears to be working 100%. Diagnostics compare it within 1% to another of the same drive model in my system. The error is listed as a controller error.

 

[aka1nas]

Double check in Device Manager that the drive is still running in DMA mode. If it's been dropped down to PIO or MW-DMA2, then it's likely either the drive or the cable going bad(or just loose in the case of the cable).

 

[RyanF]

It dropped to PIO mode. I'm getting more and more HD controller errors in the System Log.

Going to reseat the cable.

 

[RyanF]

The drive reads at ~120mb/s on the first ~310gb, and near zero on the last 300 gb. Reinstalling the drive reverts it back to DMA-5, but as soon as a transfer is started, it quickly drops to PIO and pops up massive quantities of errors.

Thanks for your help. RMA time