7K6000 datasheet(40/274 Pages) WESTERN

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HGST Hard Disk Drive Specification

6.6

Vibration and shock

All vibration and shock measurements recorded in this section are made with a drive that has no mounting

attachments for the systems. The input power for the measurements is applied to the normal drive mounting points.

6.6.1 Operating vibration

6.6.1.1

Random vibration (Linear)

The test is 30 minutes of random vibration using the power spectral density (PSD) levels shown below in each of

three mutually perpendicular axes. The disk drive will operate without non-recoverable errors when subjected to the

below random vibration levels.

Frequency

5 Hz

17 Hz

45 Hz

48 Hz

62 Hz

65 Hz

150 Hz

200 Hz

500 Hz

RMS

(m/sec2)

[(m/sec2)2/Hz]

1.9 x

10E

–3

1.1 x

10E

–1

1.1 x

10E

–1

7.7 x

10E

–1

7.7 x

10E

–1

9.6 x

10E

–2

9.6 x

10E

–2

4.8 x

10E

–2

4.8

x10E-2

6.57

Table 21

Random vibration PSD profile break points (operating)

The overall RMS (root mean square) level is 6.57 m/sec2 (0.67 G).

6.6.1.2

Swept sine vibration (Linear)

The drive will meet the criteria shown below while operating in the specified conditions:

 No errors occur with 4.9 m/sec2 (0.5 G) 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with 3-

minute dwells at two major resonances

 No data loss occurs with 9.8 m/sec2 (1 G) 0 to peak, 5 to 300 to 5 Hz sine wave, 0.5 oct/min sweep rate with

3-minute dwells at two major resonances

6.6.1.3

Random vibration (Rotational)

The drive will meet the criteria shown below while operating in the specified conditions:

 Less than 20% Performance degradation

 The overall RMS (Root Mean Square) level of vibration is 12.5Rad/sec^2. PSD profile is shown below.

Frequency

20 Hz

100 Hz

200 Hz

800 Hz

1000 Hz

1500 Hz

1700 Hz

2000 Hz

RMS

(Rad/s2)

[(Rad/s2) 2/Hz]

1.90E-

1.87E-

5.33E-

7.70E-

4.00E-

12.5

Table 22

Random vibration (Rotational) PSD profile break points

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