HD dead in one NAS, alive in another?

DrJones wrote:
But I reformatted the drive to NTFS....will that still go undetected?

Yes, once a sector is marked as reallocated it won't be read. It's not used. The filesystem on top is irrelevant to this.

DrJones wrote:
I will try the disk test boot option when I replace the drive into the NAS and after it syncs back up, and then may call tech support....not sure what good it'll do, the drive either works fine or doesn't, right?

Drives can show signs of failing before they actually go dead. It's not as black and white as you say.

DrJones wrote:
I just bought it, so should be able to easily RMA to Seagate...

I would be inclined to do this. Your reallocated sector count is quite high.

Here's a suggestion from bollar:

bollar wrote:
What I would do is buy another drive and send the bad drive to Seagate for replacement and I would use the following code: 6FD1A1AE RAID system blocked SeaTools from testing the drive. When the replacement drive returns (takes about a week), I would set it aside as a spare for when a future drive fails.

DrJones wrote:
Also, all data is backed up to USB and also ReadyNAS Vault, so we're covered. :)

Good.