Note 7. The disk drive orientation for shock test is shown in Figure 4.2.
Figure 3.2 Shock test direction
Test conditions on shock test are as follows.
(1) Operating
147m/s2(15G) (Shock mode: half sine wave 11 ms, Test cycle: 5 times)
(2)
735m/s2(75G) (Shock mode: half sine wave 11 ms, Test cycle: 5 times)
2450m/s2(250G) (Shock mode: half sine wave 2 ms, Test cycle: 5 times)
Note 8. Acoustic noise is measured except for the start, stop and seek operations. Note 9. Recoverable error is measured at the nominal condition with voltage,
temperature and default error recovery parameters.
Note 11. MTBF represents a prediction of performance based upon a large statistical sample calculated in accordance with Hitachi's standard procedures.
Hitachi does not warrant that the predicted MTBF is representative of any particular unit or group of units comprising a customer base. The actual failure rates will vary from unit to unit. Surface temperature of HDA is 50°C or less.
A failure defined by MTBF calculation is any event that requires repair or replacement of HDD.
Note 12. Total idle mode power (W) / Total formatted capacity (GB)
Drawing No. Sheet No. Revision ６ | ||
K6610091 | 13/43 | 2005/2/23 |