Filter
Top Products
Drawing No. Sheet No. Revision
K6610091 13/43 2005/2/23
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/s
2
(15G) (Shock mode: half sine wave 11 ms, Test cycle: 5 times)
(2) Non-operating
735m/s
2
(75G) (Shock mode: half sine wave 11 ms, Test cycle: 5 times)
2450m/s
2
(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.
Non-recoverable error is defined at the condition of auto-reallocation enabled.
Note 10. The drive should be mounted properly (see section 8).
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)