MY Book is "sleepy" and very slow to wake up!

My MY Book has become very slow to wake from its sleep mode. The drive spins, spins faster, spins, spins faster, spins, spins, and spins until it finally get going.  And, if I do not access it for more than 10 minutes, the drive seems to stop spinning and tries to return to sleep. I have to take some action to keep it awake. This remains me of playing with a screen saver.  I have run diagnostices and switched computer -same issues. Is it the drive or the cable? I can’t afford to lose the data! Help, please.

Hi dude, if your drive uses Smartware then you can disable the sleep timer under settings> drive settings.