IBM DCAS-32160 - Ultrastar 2.1 GB Hard Drive, Технические характеристики

Страница: 65 / 232

Overall R M S (Root Mean Square) level of vibration is 1.04G (RMS).
6.8.2.2 Swept Sine Vibration
- 2 G (Zero to peak), 5 to 500 to 5 Hz sine wave
- 0.5 oct/min sweep rate
- 3 minutes dwell at two major resonances
6.8.3 Operating Shock
The drive meets the following criteria.
N o errors within shock pulses of 5G, 11ms half-sine wave.
N o data loss, seek errors, or permanent damages within shock pulses of 10G, 11 ms half-sine wave.
N o data loss or permanent damages at Idle, Seek and Read modes within shock pulses of 30G 4ms, or
15G 5ms half-sine wave.
The shock pulses of each level are applied to the drive, ten pulses for each direction and for all three axes.
There must be a minimum of three seconds delay between shock pulses. The input level is applied to a base
plate where the drive is attached with four screws.
6.8.4 Non-Operating Shock
The drive withstands without damage or degradation of performance, a 75G half-sine wave shock pulse of
11 ms duration on six sides.
The shocks are applied for each direction of the drive for three mutually perpendicular axes and one axis at a
time. Input levels are measured on a base plate where the drive is attached with four screws.
The drive withstands without damage or degradation of performance, a 125G half-sine wave shock pulse of
2 ms duration in direction of connector insertion.
Note: Actuator is automatically locked at power-off to keep the heads on a landing zone.
Specification
51