HGST Hitachi HTS541010A9E680 1TB From a G-Drive case, this is the drive without the fancy case.

I know by the noise that I will need to open this one up so I need a donor drive for replacement heads. (the parts that read the data). Good job I have a ton of these for nearly every hard drive.

Perfect match as a donor drive from my big box of these. Note the matching model number. Now I need to open it up and see what all the fuss is.