Purchased and installed a 4TB WD Black Internal HDD (WD 4003FZEX) under Win 7 Professional 64.
Sometimes (not always) a box pops up that says it needs to be initialized, and gave me the choice between MBR and GPT. This is what I expected and I selected GPT each time but I received one of two different error messages, both from the Virtual Disk Manager: “The request could not be performed because of an I/O device error.” and “Incorrect function.”.
Sometimes (not always) the HDD shows up in Disk Management as Disk 3 – Unknown – Not Initialized. When I right click on it the Initialize Disk command is in grey vs black and will not work.
The HDD seems to always show up in Device Manager – Disk drives as SCSI Disk Device. If I try to update the driver software: “Windows has determined that the driver software for your device is up to date.” (I have, of course, updated all my system drivers and installed all Windows Updates.)
I have two other 3 TB WD SCSI drives in this computer that I was able to normally initialize as GPT with Healthy 279.39 GB NTFS single partitions, and have been using these for a couple years.
Sometimes (not always) a box pops up that says it needs to be initialized, and gave me the choice between MBR and GPT. This is what I expected and I selected GPT each time but I received one of two different error messages, both from the Virtual Disk Manager: “The request could not be performed because of an I/O device error.” and “Incorrect function.”.
Sometimes (not always) the HDD shows up in Disk Management as Disk 3 – Unknown – Not Initialized. When I right click on it the Initialize Disk command is in grey vs black and will not work.
The HDD seems to always show up in Device Manager – Disk drives as SCSI Disk Device. If I try to update the driver software: “Windows has determined that the driver software for your device is up to date.” (I have, of course, updated all my system drivers and installed all Windows Updates.)
I have two other 3 TB WD SCSI drives in this computer that I was able to normally initialize as GPT with Healthy 279.39 GB NTFS single partitions, and have been using these for a couple years.
I'd strongly recommend you to get in touch with our technical support and send your RMA request. We should be able to provide you with a replacement soon enough. 
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