Drive Mounting; Heads Unload And Actuator Lock - Hitachi 7K400 - Deskstar Hard Drive Specifications

7.5.4 Drive mounting

The drive will operate in all axes (6 directions). Performance and error rate will stay within specification limits if
the drive is operated in the other orientations from which it was formatted.
For reliable operation, the drive must be mounted in the system securely enough to prevent excessive motion or
vibration of the drive during seek operation or spindle rotation, using appropriate screws or equivalent mounting
hardware.
The recommended mounting screw torque is 0.6 - 1.0 Nm (6-10 Kgf.cm).
The recommended mounting screw depth is 4 mm maximum for bottom and 4.5 mm maximum for horizontal
mounting.
Drive level vibration test and shock test are to be conducted with the drive mounted to the table using the bottom
four screws.

7.5.5 Heads unload and actuator lock

The head load/unload mechanism is provided to protect the disk data during shipping, movement, or storage. Upon
power down, the heads are automatically unload from the disk area and the locking mechanism of the head actuator
will secure the heads in unload position.
Deskstar 7K400 Hard Disk Drive Specification
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