Browse Prior Art Database

Pivoting Dual Surface Load/Unload Ramp to Maximize Disk Allocation

IP.com Disclosure Number: IPCOM000115343D
Original Publication Date: 1995-Apr-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Bicknese, BW: AUTHOR [+9]

Abstract

Disclosed is a dual surface load unload ramp used in a Direct Access Storage Device (DASD) to remove the read/write heads from the disk surface when the unit is powered down or put into a power conservation mode.

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This is the abbreviated version, containing approximately 75% of the total text.

Pivoting Dual Surface Load/Unload Ramp to Maximize Disk Allocation

      Disclosed is a dual surface load unload ramp used in a Direct
Access Storage Device (DASD) to remove the read/write heads from the
disk surface when the unit is powered down or put into a power
conservation mode.

      A top view of the dual surface ramp is depicted in the Figure.
Besides the dual surface ramp, a disk, an actuator, and an
electromechanical means are shown.  The system is presented in the
power-off or power conservation mode where the read/write heads have
been removed from the disk surface.

      The ramp itself consists of two load/unload surfaces that have
different slopes relative to a plane that is perpendicular to the
axis of rotation of the disk.  The surface closest to the actuator
pivot has a slope that is larger than the outboard surface and is
used to unload the heads from the disk.  The outboard surface with
the shallower slope is used to load the heads back onto the disk.  In
the figure, the ramp pivot is shown inboard of the electromechanical
means attachment point.  A solenoid is shown as the electromechanical
means, but it may also consist of a bi-metallic element, a relay, or
other such device commonly used.

      In the power-off or power conservation mode, the
electromechanical means are not active and the ramp is positioned so
that the actuator load/unload tab extending from the far end of the
actuator assembly will engage the steeper inboard...