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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 other orientations than that
in 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 3.8 mm maximum for bottom and 6.1 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.
Heads Unload and Actuator Lock
Heads are moved out from disks (unload) to protect the disk data during shipping, moving, or storage. Upon power
down, the heads are automatically unloaded from disk area and the locking mechanism of the head actuator will
secure the heads in unload position.
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Western Digital Ultrastar DC HC310 SATA Product Manual