NAS DUO reports new HD dead, but it passes diagnostics

Question

I have a ReadyNAS Duo with two 2TB drives. Recently the green light for one drive went out and the NAS reported the drive as "dead". I removed the drive and ran seatools, it passed the smart and quick test but failed the long test. I purchased a WD20EARS (the only compatible 2TB drive in stock at newegg) and inserted it, after two days the drive was still shown as "dead". I removed the drive and ran WD diagnostics, it passed the smart, short, and long tests. I formatted it NTFS and again installed it in the DUO. As of this writing the drive is still shown as dead.

I suspect the duo itself has a problem. What's my next step? Is there any way to test the duo aside from throwing additional drives at it?
Thanks

mdgm-ntgr · Answer

Don't format the disk, delete the partitions off it. The NAS needs to format the disk.

shimrod · Answer

I didn't format the drive the first time I installed it. While I did format it after performing the diagnostics I did not partition it.

StephenB · Answer

shimrod wrote:...While I did format it after performing the diagnostics I did not partition it.That is not possible.  When you formatted the drive as NTFS, Windows created a partition for you automatically.  It might have called it "initializing". You can re-insert the disk in the PC, and delete the partition (which returns the drive to the unformatted state that the NAS prefers).  You do this by right-clicking on Computer (or My Computer) and selecting "Manage".  You'll see the disk in the storage section.  Right-click on the volume and  delete it.  Then eject the drive.  Be careful to click on the right drive!

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NAS DUO reports new HD dead, but it passes diagnostics

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