Clicking sound with Seagate Barracuda LP ST32000542AS 2TB

maxblack wrote:
Presumably you are referring to the last bullet item: # Test Disks (new option as of 4.2.9)

Yes.

maxblack wrote:
which was not described in the article at all. Does it go without saying that this is a non-destructive test? :scared:

I believe this is non-destructive. I remember reading on the forum that it's designed for testing disks before doing things like replacing disks to get expansion. If a disk is failing and you replace a different one you could end up quite easily with a two disk failure condition (i.e. failing disk fails during resync). If the LONG SMART tests identify a disk as failing hopefully this problem can be avoided.

Edit: just found the post:
"Test disks"

chirpa wrote:
It runs a SMART Offline/Long Test. It can take 5+ hours to run, as each disk runs through its own self-diagnostics. It is a good thing to run before doing expansions, to avoid running into a dual disk failure (where one disk is pulled to replace/expand, and another one is starting to fail but not completely failed yet).