WD15EADS-00P8B0 Really slow? Or am I just crazy?

Im in Australia.

WD20EADS is getting about 21,000 disk and NTFS errors in event viewer per 24 hours. (Win7-64)

For the past few days I’ve been moving files off it at a blistering 0.6-3MBytes/s.

This is a completely new failure mode for me. Usually drives just stop spinning or get squillions of bad sectors. This one is actually copying everything successfully bar 1 file - albeit at about the speed of my internet.

For the first 4 months of its life, it was in a 2k8 server as storage and OS. It was quite fast with benchmarks well above 80m/s. As it failed, I noticed it because videos were glitching. I decided a reboot was in order. It stopped booting. 

And here we are. I cant help but think this is some form of controller failure. 

It’s like the drive has decided that it is permanently in low speed mode.

RMA in probably another week at this rate. Once it’s empty. Sigh.