ADAPTER ASSEMBLY FOR CONCURRENT EMULATION OF A NATIVE CHANNEL

• US 20090006073A1
• Filed: 02/21/2008
• Published: 01/01/2009
• Est. Priority Date: 06/29/2007
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Wilson, Jim Everett, Mahr, Jay Alan, Thaler, Todd Charles
• Granted Patent: US 8,731,899 B2
• Time in Patent Office: Days
• US Class Current: 703/27
• CPC Class Codes: G11B 20/1816 Testing
• CPC Class Codes: G11B 2020/1282 in embedded servo fields
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: G11B 5/455 Arrangements for functional testing of heads; Measuring arrangements for heads
• CPC Class Codes: G11B 5/59688 Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns

Abstract

Various embodiments of the present invention are generally directed to an apparatus and method for recovering data from a signal generator using a native communication channel and an emulated communication channel coupled in parallel to the native communication channel.

Claims

1. An apparatus comprising an adapter assembly configured to establish a communication path between a data processing device and a data evaluation device, the adapter assembly coupled between a native channel and a signal generator of the data processing device to condition and forward a data signal from the signal generator to an emulated channel of the data evaluation device, wherein a servo data portion of said data signal is demodulated by the native channel and a user data portion of said data signal is decoded by the emulated channel.

2. The apparatus of claim 1, wherein the data processing device comprises a data storage device and the signal generator comprises a storage memory, a transducer head and a preamplifier/driver circuit which interfaces with the transducer head.

3. The apparatus of claim 1, wherein the native channel further provides at least one control signal to the signal generator to initiate generation of the data signal.

4. The apparatus of claim 1, wherein the adapter assembly comprises conditioning circuitry which conditions the user data portion of the data signal output by the signal generator prior to reconstruction by the emulated channel.

5. The apparatus of claim 1, wherein the adapter assembly comprises a flex adapter comprising a plurality of electrical contact pads configured for insertion between a connector of the native device and a control board of the native device on which the native channel is disposed so that said respective portions of the data signal are concurrently forwarded along the adapter assembly to the emulated channel and along the control board to the native channel.

6. The apparatus of claim 1, wherein the adapter assembly further operates to apply a write data signal generated by the emulated channel to the signal generator, and wherein the user data portion of the data signal comprises a readback signal obtained by transducing a recording pattern generated by the signal generator in response to the write data signal.

7. The apparatus of claim 1, wherein the servo data portion of the data signal is generated by transducing an embedded servo field and the user data portion of the data signal is generated by transducing a data sector adjacent the servo field along a selected track on a storage medium.

8. An apparatus comprising:

a native device comprising a signal generator coupled to a native communication channel;

a data evaluation board comprising an emulated communication channel with a parametric configuration that is different from a parametric configuration of the native communication channel; and

first means for coupling the signal generator to the emulated communication channel so that during operation of the native device, the emulated communication channel decodes a data signal generated by the signal generator in response to at least one control signal output by the native channel.

9. The apparatus of claim 8, wherein the native communication channel decodes a servo data portion of the data signal and the emulated communication channel concurrently decodes a user data portion of the data signal.

10. The apparatus of claim 8, wherein the native device comprises a data storage device and the signal generator comprises a storage memory, a transducer head and a preamplifier/driver circuit which interfaces with the transducer head.

11. The apparatus of claim 8, wherein the first means comprises an adapter assembly with conditioning circuitry which conditions the data signal output by the signal generator prior to reconstruction by the emulated communication channel.

12. The apparatus of claim 11, wherein the adapter assembly is characterized as a flex adapter comprising a plurality of electrical contact pads configured for insertion between a connector of the native device and a control board of the native device on which the native channel is disposed so that the data signal is concurrently forwarded along the adapter assembly to the emulated channel and along the control board to the native communication channel.

13. The apparatus of claim 8, wherein the at least one control signal comprises a read gate signal, and wherein the first means further comprises means for passing the read gate signal from the native communication channel to the signal generator to enable outputting of the data signal to the emulated communication channel.

14. The apparatus of claim 8, wherein the data signal output by the signal generator is characterized as a readback signal comprising a user data portion and a servo data portion, wherein the first means further comprises means for applying a write data signal generated by the emulated communication channel to the signal generator to store a pattern in response thereto, and wherein the user data portion of the readback signal is generated by transducing said stored pattern.

15. A method comprising steps of:

coupling an adapter assembly between a native device and a data evaluation device to establish a communication path having a first end between a signal generator and a native channel of the native device and a second end in communication with an emulated channel of the data evaluation device;

using the signal generator to generate a data signal;

recovering a first set of data from the generated data signal using the native channel, and concurrently recovering a second set of data from the generated data signal using the emulated channel.

16. The method of claim 15, wherein the native device comprises a data storage device and the signal generator comprises a head-disc interface coupled to a preamplifier/driver circuit.

17. The method of claim 16, wherein the adapter assembly comprises a flex adapter comprising a plurality of electrical contact pads configured for insertion between a bulkhead connector of the native device and a control board of the native device on which the native channel is disposed so that the common set of signals are concurrently forwarded along the flex adapter to the emulated channel and along the control board to the native channel.

18. The method of claim 16, wherein the first set of data are characterized as servo data, and wherein the second set of data are characterized as user data, wherein the servo data are embedded within the user data.

19. The method of claim 16, wherein the using step comprises outputting at least one control signal from the native channel to the signal generator, and generating the data signal in response to the at least one control signal.

20. The method of claim 16, wherein the using step comprises providing a command to the native device from the data evaluation device to initiate the generation of the data signal, said command transmitted along a second communication path established between the native device and the data evaluation device.