4.4Power-on Sequence
Figure 4.3 describes the operation sequence of the disk drive at
a)After the power is turned on, the disk drive executes the MPU bus test, internal register read/write test, and work RAM read/write test. When the
b)The disk drive executes
c)After confirming that the spindle motor has reached rated speed, the disk drive releases the heads from the actuator magnet lock mechanism by applying current to the VCM. This unlocks the heads which are parked at the inner circumference of the disks.
d)The disk drive positions the heads onto the SA area and reads out the system information.
e)The disk drive executes
f)The drive becomes ready. The host can issue commands.
4 - 6 |