Contact induced data storage device destruction

Patent metadata

Field	Value
Publication number	US-9779773-B1
Application number	US-201715417894-A
Country	US
Kind code	B1
Filing date	Jan 27, 2017
Priority date	Dec 6, 2016
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A data storage device may be destroyed by suspending a transducing head above a data storage medium prior to inducing contact of the transducing head with a first layer of the data storage medium in response to a signal from a controller. Deflection of the transducing head can then be increased to penetrate to a destroy depth in a second layer of the data storage medium that is maintained while the data storage medium spins. The controller may then issue at least one data read command to access data from the data storage medium and when a data read error is received, the data storage medium and transducing head can be verified as destroyed and incapable of accessing data previously written to the data storage medium.

First claim

What is claimed is:

1. A method comprising:
suspending a transducing head above a data storage medium where data is stored;
inducing contact of the transducing head with a first layer of the data storage medium in response to a signal from a controller;
increasing deflection of the transducing head to penetrate into a second layer of the data storage medium;
spinning the data storage medium while the transducing head penetrates the second layer; and
destroying the transducing head and data storage medium so that data of the data storage medium is not readable.

2. The method of claim 1 , wherein the contact with the first and second layers are achieved by activating a heater of the transducing head with the controller.

3. The method of claim 1 , wherein the controller conducts seek operations with the transducing head while the transducing head penetrates the second layer.

4. The method of claim 3 , wherein the seek operations continuously extend from an inner diameter of the data storage medium to an outer diameter of the data storage medium.

5. The method of claim 1 , wherein the controller raises the transducing head above the data storage medium after the spinning step.

6. The method of claim 5 , wherein the controller subsequently lowers the transducing head to penetrate into the second layer.

7. The method of claim 6 , wherein the controller produces a pattern of separated gouge tracks on the data storage medium.

8. The method of claim 3 , wherein the seek operations produce a continuously curvilinear gouge track into the second layer.

9. A method comprising:
suspending a transducing head above a first data storage medium;
inducing contact of the first transducing head with a first layer of the first data storage medium in response to a signal from a controller;
increasing deflection of the first transducing head to a destroy depth that penetrates to a second layer of the first data storage medium;
maintaining destroy depth while the first data storage medium spins;
issuing a data read command with the controller to access data from the first data storage medium; and
receiving a data read error to ensure the first data storage medium and first transducing head are incapable of accessing data previously written to the first data storage medium.

10. The method of claim 9 , wherein the controller confirms the maintaining step produces debris.

11. The method of claim 10 , wherein the controller senses debris being present on a second data storage medium connected to the first data storage medium via a spindle.

12. The method of claim 9 , wherein the controller concurrently conducts the inducing, increasing, and maintaining steps with a second transducing head and a second data storage medium, the first and second data storage media connected via a spindle.

13. The method of claim 9 , wherein the controller conducts the inducing, increasing, and maintaining steps with less than all the transducing heads of a data storage device.

14. The method of claim 9 , wherein the controller creates multiple gouge tracks into the second layer with different depths, the respective depths measured from an air bearing surface through the first layer.

15. An apparatus comprising a transducing head suspended above a data storage medium prior to contact of the transducing head with a first layer of the data storage medium in response to a signal from a controller, the controller configured to increase deflection of the transducing head to penetrate a second layer of the data storage medium while the data storage medium spins.

16. The apparatus of claim 15 , wherein the transducing head is destroyed by the contact with the data storage medium.

17. The apparatus of claim 15 , wherein the data storage medium is destroyed by the contact with the transducing head.

18. The apparatus of claim 15 , wherein an actuating suspension articulates the transducing head while transducing head penetrates the second layer.

19. The apparatus of claim 15 , wherein the first layer is a protective top layer positioned between an air bearing and the second layer.

20. The apparatus of claim 15 , wherein the second layer is a magnetic recording material.

Assignees

• Seagate Technology Llc

Inventors

• Courtney Timothy J

Classifications

• G11B5/5521

  across disk tracks (spiral track following G11B5/596) · CPC title

• G11B20/00927 Primary

  wherein said defects or errors are generated on purpose, e.g. intended scratches · CPC title

• G11B2005/0021

  Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal · CPC title

• G11B5/56

  with provision for moving the head {support} for the purpose of adjusting the position of the head relative to the record carrier, e.g. manual adjustment for azimuth correction or track centering ({G11B5/52,} G11B5/54, G11B5/58 take precedence) · CPC title

• G11B5/6076

  Detecting head-disk contact · CPC title