I have had same noise happen with WD10EALX 1TB Caviear Blue SATA III that I bought from Newegg early last month. Sent back and received replacement drive (identical) and same noise. Sent back a second time and awaiting my second replacement. If I have same problem with the third drive I’ll get my $ back and source a different mfg. With both drives making the noise the SMART data is all good, and ran short and extended test (both good). Benched the drive and speed is as advertised. But that unsettling noise every 5-10 sec is unnerving to say the least. I think the sound is more like a thump/bump than a tick but clearly heard above all the whirring of the case fans. Shame because I have had WD drives in past that have worked flawlessly for me.
It is definitely an rma case. Drives do not make that noise normally. I have some others suggest that it is the head parking over and over again, but I have not found any way to substantiate that claim.
I just received my second replacement WD 1 TB SATA 3 Cav Blue drive from Newegg yesterday and installed it. No ticking/clicking/clunking. All tests are good (but they were on the other drives as well). Seems like three times a charm :) Hope you get your issue resolved as well.
I was surprised to find my WD20EARX - 00ZUDB0 to have 4 x 500GB platters while the same model - 00PASB0 has only 3 x 667 GB platters. Fewer platters mean less vibrations and less noise.
I’ve sent it off yesterday. Hope I’m going to get the 00PASB0 type instead of 00ZUDB0.