That cold spare will eventually develop stiction, seizing the parked haed
to the surface of the disk solidly enough that the disk motor cannot
break it loose to spin the disk up. Such is best treated by hooking up
the cables, but holding the drive in your hand so that you can turn on
the power, and within a couple seconds, give the drive a good sideways
blow on a corner with the ball of the wrist so the drive housing/casting
is caused to rotate a few degrees around the axis of the disk, breaking
the stiction so the spindle motor can spin it up. The theory is that the
drive frame rotates when you drive it by hitting the corner, but the
disk doesn't, breaking the stiction seal.