What is the Power On Hours (POH)?

In the context of storage devices, Power On Hours  refers to the lenght of time, in terms of hours, the drive has been operational.  It is used as an indicator of the age of the drive. A storage device with a high value of POH typically has a higher failure probability than a storage device with a low value of POH.  

Tags: S.M.A.R.T, Storage Device