Browse Prior Art Database

Hard Disk Drive with High Flight Height Head at Idling Time

IP.com Disclosure Number: IPCOM000114572D
Original Publication Date: 1995-Jan-01
Included in the Prior Art Database: 2005-Mar-29
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Kawamoto, Y: AUTHOR [+4]

Abstract

This disclosure describes a method to keep the Flying Height (FH) higher than data zone at idling. The peculiarity of this method is that Actuator moving over the line between actuator pivot and disk center (Fig. 1 Zone-C). The airflow comes from leading edge to trailing edge at Zone-A. But this direct ion turned over at Point-B, and the direction of airflow at Zone-C becomes reverse.

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Hard Disk Drive with High Flight Height Head at Idling Time

      This disclosure describes a method to keep the Flying Height
(FH) higher than data zone at idling.  The peculiarity of this method
is that Actuator moving over the line between actuator pivot and disk
center (Fig. 1 Zone-C).  The airflow comes from leading edge to
trailing edge at Zone-A.  But this direct ion turned over at Point-B,
and the direction of airflow at Zone-C becomes reverse.

      It is usualy used as a power save mode to fix the actuator at
ID-CS (ID crash stop) position.  And in the Hard Disk Drive (HDD)
which used in a server, this condition was kept fo r a long time.  To
keep the FH higher at idling can prevent from contact between head
and disk, and improve the reliability for flyability.

      Fig. 2 shows an example of FH profile using the Negative
Pressure type slide r.  FH at Point-B and Zone-C is much higher than
datazone (Zone-A), and it shows that this type of actuator is
effective
for ID-CS idling and flyability.