Hitachi HUS157336EL3600 Oem Manual page 13

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.
Drawing No. Sheet No. Revision 5
K6602906 13/46 2003/6/12