Shock And Vibration; Dc Power; Input Noise - Seagate ST5660A Product Manual

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1.8 Shock and vibration

All shock and vibration specifications assume that the inputs are measured
at the drive mounting screws. Shock measurements are based on an
11-msec, half sine wave shock pulse, not to be repeated more than twice
per second.
During normal operating shock and vibration, there is no physical dam-
age to the drive or performance degradation.
During abnormal operating shock and vibration, there is no physical
damage to the drive, although performance may be degraded during the
shock or vibration episode. When normal operating shock levels resume,
the drive meets its performance specifications.
During nonoperating shock and vibration, the read/write heads are
positioned in the shipping zone.
Normal
operating
Shock 2 Gs
5–22 Hz vibration 0.020-inch
displacement
22–400 Hz vibration 0.50 Gs

1.9 DC power

Except during the write procedure, you can turn off and turn on power to
the drive in any sequence without losing data or damaging the drive. If
you turn off the power during a write procedure, you may lose the data
currently being written.

1.9.1 Input noise

Voltage tolerance
(including noise)
Input noise frequency
(max)
Input noise
(max, peak-to-peak)
ST5660A Product Manual, Rev. A
Abnormal
operating Nonoperating
10 Gs 75 Gs
0.030-inch 0.160-inch
displacement displacement
0.75 Gs 4.00 Gs
+5V +12V
± 5% ± 5%
25 MHz 25 MHz
240 mV
100 mV