Adding new drive - went "Unmountable"

[MrInvolved]

Hey guys, long time lurker, first time poster.

 

I'm building the size of my first array and i've added a older 4tb harddrive. I copied the existing data and added the drive, this morning i noticed it was "unmountable". Not sure of the scale of this problem..

 

I really just want to know if the drive is good to continue using, or i should go ahead a replace it? (or something else - new cable/port?)

tower-diagnostics-20220926-1151.zip

[JorgeB]

According to diags disk2 was never formatted, it needs to be formatted before use.

[MrInvolved]

Ah, thank you.
My bad memory got the better of me (better up there, than in the server 🤣 )