hard drive ticking

[disturbed13]

i have 3 hard drives in my PC
a primary 1 TB HDD
a 1.5 TB HDD for storage
and another 1 TB HDD that is ment to be the clone of the primary

right now i am hearing a ticking sound coming from one of them

does anyone have any advise on how to tell which one is ticking?

 

[OhSnapWord]

Disconnect all drives and only power up one at a time.