Browse Prior Art Database

Multihead Flyability Tester

IP.com Disclosure Number: IPCOM000099733D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Block, EE: AUTHOR [+5]

Abstract

A multiheaded tester (MHT) is a test vehicle for direct-access storage device (DASD) components (heads and disks). The MHT design features are: - Simultaneous operation of multiple heads on a single disk surface. - Simultaneous testing of multiple disk surfaces. - Independent operation of each of the heads on a disk surface. Any desired access routine can be used for operation. - Control of the head/disk environment accomplished by controlling characteristics of an external air supply.

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This is the abbreviated version, containing approximately 64% of the total text.

Multihead Flyability Tester

       A multiheaded tester (MHT) is a test vehicle for
direct-access storage device (DASD) components (heads and disks).
The MHT design features are:
-    Simultaneous operation of multiple heads on a single
     disk surface.
-    Simultaneous testing of multiple disk surfaces.
-    Independent operation of each of the heads on a disk
     surface.  Any desired access routine can be used for
     operation.
-    Control of the head/disk environment accomplished by
     controlling characteristics of an external air supply.

      The MHT shown in Fig. 1 comprises seven stationary
(non-accessing) stations 1-7 and one functional actuator station 8
positioned by a stepper motor 9.  Each of the eight stations have a
capability of operating one head each on a common disk surface.  The
heads on non-accessing stations 1-7 are manually positioned.

      Functional actuator station 8 is operated in any desired access
routine.  Stepper motor 9 controls the access motion of the
functional actuator station 8.  Actuator station 8 is supported by a
block 20 shown in Fig. 2.  Block 20 is permitted to move on MHT base
14 to provide radial alignment with a disk 15.  An arm holder 18 is
dedicated to the type of arm or suspension assembly that is tested,
but remains interchangable.

      In Fig. 1, the heads on stationary stations 1-7 are manually
positioned for on-track operation.  In Fig. 2, stationary stat...