> ID#4 Start_Stop_Count and/or ID#193 Load_Cycle_Count.
> https://en.wikipedia.org/wiki/S.M.A.R.T.#Known_ATA_S.M.A.R.T._attributes
> This will show you if a drive does spin up and down.
Start_Stop_Count should indeed tell you how many times the disk spun
up&down.
OTOH Load_Cycle_Count indicates something which IIUC has nothing to do
with disk spin, but with something like head parking.
Stefan