Datasheet

Z5K500 OEM Specifications

6.3.6.4 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 of the hard

disk drive. Simple power cycling of the hard disk 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 HGST

recommends that the power-off portion of the cycle contain the sequence specified in section 6.3.6.2,

"Required Power-Off Sequence”. If this is not done, the emergency unload function is invoked and

non-typical stress results are made.