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4
1.4.2 Power-down sequence
Caution. Do not move the drive until the motor has come to a complete
stop.
1. The power is turned off.
2. Within 3 seconds, the motor begins to spin down.
3. The heads automatically move to the shipping zone, which is inside
the maximum data cylinder.
4. The magnetic actuator locks the arm with the heads over the landing
zone. This completes the power-down sequence.
1.4.3 Auto-park
Upon power-down, the heads automatically move to the shipping zone.
The heads park inside the maximum data cylinder. When power is
applied, the heads recalibrate to track 0.
1.5 Reliability
Read error rates are measured with automatic retries and data correction
with ECC enabled and all flaws re-allocated. The mean time between
failures (MTBF) is measured at nominal power at sea level and at an
ambient temperature of 40 ° C.
Nonrecoverable read errors
Seek errors
MTBF
Service life
1.6 Physical dimensions
The mounting dimensions are shown in Figure 5 on page 19.
Height, max
Width, max
Depth, max
Weight
ST5660A Product Manual, Rev. A
13
1 per 10
bits transferred
7
1 per 10
physical seeks
300,000 power-on hours
5 years
0.748 inches (19 mm)
4.00 inches (101.6 mm)
5.00 inches (127 mm)
1.0 lb (0.45 Kg)
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