Hitachi HTS725050A9A364 Datasheet download pdf (Page 31)

7K500 OEM SPECIFICATION

Page 31 of 176

6.3.6.4

6.3.6.46.3.6.4

6.3.6.4

Test considerations

Test considerationsTest considerations

Test considerations

Start/stop testing is classically performed to verify head/disk durability. The heads do not land on the disk,

so this type of test should be viewed as a test of the load/unload function.

Start/Stop testing should be done by commands

through the interface, not by power cycling

the drive.

Simple power cycling of the drive invokes the emergency unload mechanism and subjects the HDD to

non-typical mechanical stress.

Power cycling testing may be required to test the boot-up function of the system. In this case HItachi

recommends that the power-off portion of the cycle contain the sequence specified in section 6.4.6.2,

"Required Power-Off Sequence” on page 29. If this is not done, the emergency unload function is

invoked and non-typical stress results.

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Hitachi HTS725050A9A364 Datasheet Page 31