WO2009129072A1 - Disk drive emulator and method of use thereof - Google Patents

Disk drive emulator and method of use thereof Download PDF

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Publication number
WO2009129072A1
WO2009129072A1 PCT/US2009/039591 US2009039591W WO2009129072A1 WO 2009129072 A1 WO2009129072 A1 WO 2009129072A1 US 2009039591 W US2009039591 W US 2009039591W WO 2009129072 A1 WO2009129072 A1 WO 2009129072A1
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WO
WIPO (PCT)
Prior art keywords
disk drive
emulator
testing
test slot
sensor
Prior art date
Application number
PCT/US2009/039591
Other languages
French (fr)
Inventor
Edward Garcia
Michael L. Ardai
Original Assignee
Teradyne, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teradyne, Inc. filed Critical Teradyne, Inc.
Priority to JP2011505082A priority Critical patent/JP5319756B2/en
Priority to CN200980122986.7A priority patent/CN102066957B/en
Publication of WO2009129072A1 publication Critical patent/WO2009129072A1/en

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Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/12Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
    • G11B33/121Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G11B19/048Testing of disk drives, e.g. to detect defects or prevent sudden failure
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508Magnetic discs
    • G11B2220/2516Hard disks

Definitions

  • This disclosure relates to disk drive emulators and methods of testing test slots of disk drive testing systems.
  • Disk drive manufacturers typically test manufactured disk drives for compliance with a collection of requirements. Test equipment and techniques exist for testing large numbers of disk drives serially or in parallel. Manufacturers tend to test large numbers of disk drives simultaneously or in batches. Disk drive testing systems typically include one or more racks having multiple test slots that receive disk drives for testing.
  • a "gold drive” is a disk drive that has been independently validated as functioning and performing properly.
  • the gold drive may be used to test the functionality and performance of test slots. Validating and maintaining verification of the gold drive's veracity is cumbersome and expensive. Furthermore, testing data is limited.
  • a disk drive emulator for testing a test slot of a disk drive testing system includes an emulator housing, a testing circuit housed in the emulator housing, and an interface connecter disposed on the emulator housing and in electrical communication with the testing circuit.
  • the disk drive emulator includes at least one sensor in electrical communication with the testing circuit.
  • the at least one sensor is selected from the group consisting of a temperature sensor, a vibration sensor, and a humidity sensor.
  • the testing circuit is configured to test power delivery of the test slot to the disk drive emulator, monitor the at least one sensor, and monitor connector reliability (e.g. by monitoring connector resistance) between the test slot and the disk drive emulator.
  • the emulator housing has a width of about 70 mm and a height of between about 9.5 mm and about 19 mm.
  • the emulator housing is substantially rectangular shaped having top and bottom broad surfaces.
  • a temperature sensor is disposed near each corner of the top and bottom broad surfaces.
  • the emulator housing defines an electronics region, a motor region, and a head region.
  • a temperature sensor is disposed in each region.
  • the interface connecter comprises a universal asynchronous receiver/transmitter connector.
  • the electrical load element may be a heat source, which in some examples is variable. In one instance, the electrical load element is a motor; however, other heat and/or vibration generating items may be used such as a piezoelectric device, etc.
  • the testing circuit includes a controller in electrical communication with the at least one temperature sensor, the at least one vibration sensor, and the at least one electrical load element.
  • the disk drive emulator may include a humidity sensor in electrical communication with the testing circuit, which is configured to monitor a humidity level of the test slot.
  • a method of validating a test slot of a disk drive testing system includes establishing electrical communication between a disk drive emulator and the test slot and performing diagnostic testing on the test slot.
  • the diagnostic testing includes testing connectivity between the disk drive emulator and the test slot, testing power delivery from the test slot to the disk drive emulator, monitoring a temperature level of at least one region of the disk drive emulator, and monitoring a vibration level of at least one region of the disk drive emulator.
  • Implementations of this aspect of the disclosure may include one or more of the following features.
  • performing diagnostic testing on the test slot further includes monitoring a humidity level of the disk drive emulator.
  • testing connectivity between the disk drive emulator and the test slot includes testing a universal asynchronous receiver/transmitter connector disposed in the test slot. Testing connectivity between the disk drive emulator and the test slot may include determining a connection resistance between the disk drive emulator and the test slot. In some implementations, testing power delivery from the test slot to the disk drive emulator includes testing a voltage source level of the test slot, testing a current source level of the test slot, and testing a current limiting capacity of the test slot.
  • monitoring a temperature level of at least one region of the disk drive emulator includes monitoring a temperature level of an electronics region, a motor region, and/or a head region.
  • Monitoring a vibration level of at least one region of the disk drive emulator includes monitoring a vibration level of the head region.
  • the disk drive emulator in some examples, includes an emulator housing, a testing circuit housed in the emulator housing, and an interface connecter disposed on the emulator housing and in electrical communication with the testing circuit.
  • the disk drive emulator includes at least one sensor in electrical communication with the testing circuit.
  • the at least one sensor is selected from the group consisting of a temperature sensor, a vibration sensor, and a humidity sensor.
  • the testing circuit is configured to test power delivery of the test slot to the disk drive emulator, monitor the at least one sensor, and monitor connector reliability (e.g. by monitoring connector resistance) between the test slot and the disk drive emulator.
  • FIG. 1 is a perspective view of a disk drive emulator being inserted into a test slot of a disk drive testing system.
  • FIG. 2 is a perspective view of a test slot.
  • FIG. 3 is a perspective view of a disk drive emulator.
  • FIG. 4 is a schematic view of a disk drive emulator with a testing circuit.
  • FIG. 5 is a schematic view of a load circuit.
  • FIG. 6 is a side schematic view of a disk drive emulator housing that illustrates exemplary placement of temperature and vibration sensors within the emulator housing.
  • FIG. 7 is a top schematic view of the disk drive emulator housing shown in FIG. 6, illustrating exemplary placement of temperature and vibration sensors within the emulator housing.
  • a disk drive emulator 100 emulates or simulates an actual disk drive physically (e.g. in size, appearance, amount of radiated heat and/or vibration), but operates as a diagnostics and testing tool for validating test slots 10 of disk drive testing systems 5.
  • a test slot 10 is mounted to a rack 20.
  • a disk drive transporter 30 carries the disk drive emulator 100, and may be manipulated by a user or a robotic arm for insertion into a receptacle 12 of the test slot 10.
  • the disk drive emulator 100 is placed in a test position engaged with a test slot connector 14, shown in FIG. 2.
  • the disk drive emulator 100 includes an emulator housing 110, a testing circuit 200 (shown through a cutaway portion of the emulator housing 1 10) housed in the emulator housing 110, and an interface connecter 120 disposed on the emulator housing 1 10 and in electrical communication with the testing circuit 200.
  • the emulator housing 110 has a width of about 70 mm and a height of between about 9.5 mm and about 19 mm.
  • the interface connecter 120 is configured to mate with the test slot connector 14, and may be a universal asynchronous receiver/transmitter connector.
  • the test slot 10 communicates with the disk drive emulator 100 via Parallel AT Attachment (a hard disk interface also known as IDE, ATA, ATAPI, UDMA and PATA), SATA, SAS (Serial Attached SCSI) and/or serial communications.
  • the test slot 10 also supplies power (e.g. +5V and +12V) and ground to the disk drive emulator 100 through the interface connecter 120.
  • the disk drive emulator 100 is configured to validate the test slot 10 and diagnose issues related to the health of the test slot 10.
  • the disk drive emulator 100 tests the power supply and ground of the test slot 10, communications through the test slot connector 14, and an environmental control system of the test slot 10, which regulates temperature, humidity, and vibrations.
  • the testing circuit 200 is configured to test power delivery of the test slot 10 to the disk drive emulator 100, temperature and vibration levels of the test slot 10, and connector reliability between the test slot 10 and the disk drive emulator 100 (e.g. by monitoring connector resistance).
  • the testing circuit 200 includes a controller 210 in electrical communication with a serial communications circuit 202, which is in electrical communication with a serial communications portion 122 of the interface connector 120.
  • the controller 210 is in electrical communication with a sensor system 300, which includes at least one temperature sensor 310 and at least one vibration sensor 320.
  • the sensor system 300 also includes a humidity sensor 330 in electrical communication with the controller 210 and an air flow sensor 340 to detect and indicate the volume of air being provided to the test slot
  • the testing circuit 200 includes a power supply circuit 204 in electrical communication with a power portion 124 of the interface connector 120.
  • the power supply circuit 204 includes a voltage regulator circuit 220 and first and second switches 222, 224, each controlling electrical communication with a respective load circuit 400 and a respective analog-to-digital converter (not shown).
  • the switches 222, 224 are controlled by the controller 210.
  • FIG. 5 provides an example of the load circuit 400 which includes first and second switches 402, 404 that control current delivery to a resistor 410 and a motor 420, respectively.
  • the controller 210 controls operation of the resistor 410 and the motor 420 via their associated switches 402, 404.
  • the load circuits 400 are calibrated for their respective power supply (e.g. +5V or +12V).
  • the load circuits 400 are used to test that an external power source, accessed via power portion 124 of the interface connector 120, is functioning properly.
  • the load circuits 400 or a second set of load circuits can be used to trip a circuit breaker of the external power source, so as to test that it is functioning properly.
  • the disk drive emulator 100 generates heat to simulate heat dissipation of an actual disk drive by activating at least one of the load circuits 400 via its corresponding switch 222, 224 and delivering current to the resistor 410 and/or motor 420, as controlled by their respective switches 402 and 404.
  • the load circuit 400 may be operated to provide constant or variable heat generation.
  • the disk drive emulator 100 generates vibrations to simulate vibration characteristics of an actual disk drive by activating at least one of the load circuits 400 and delivering current to the motor 420 via switch 404.
  • the motor 420 includes a cam 424 coupled off-centered to a drive shaft 422 of the motor 420 to generate or accentuate vibrations.
  • the load circuit 400 is positioned in the housing 110 in a location where an actual disk drive typically generates heat and/or vibrations, such as in an electronics region 130, a motor region 140, and/or a head region 150 of the housing 110 (see FIGS. 6-7).
  • the testing circuit 200 includes a high speed communications circuit
  • the temperature sensors 310 and the vibration sensors 320 are positioned in the housing 110 in a location where an actual disk drive typically generates and experiences heat and vibrations, respectively.
  • the housing 1 10 has inside top and bottom surfaces 1 12, 114, an inside front surface 1 16 supporting the interface connector 120, an inside back surface 118, and inside left and right side surfaces 1 17 and 119.
  • Two temperature sensors 31OT are positioned on the inside top housing surface 1 12 near each corner adjacent the inside front housing surface 1 16.
  • two temperature sensors 31OB are positioned on the inside bottom housing surface 114 near each corner adjacent the inside front housing surface 116.
  • One temperature sensor 310B is positioned on the inside bottom housing surface 114 in the electronics region 130 (e.g. for sensing a temperature of nearby electronics).
  • One temperature sensor 31OT is positioned on the inside top housing surface 112 in the motor region 140.
  • One temperature sensor 310B is positioned on the inside bottom housing surface 114 in the head region 150.
  • One temperature sensor 310M is positioned on the inside back side housing surface 1 18 near the head region 150.
  • One or more temperature sensors 31OT may be positioned near corners of the inside top housing surface 1 12.
  • One or more temperature sensors 310B may be positioned near corners of the inside bottom housing surface 1 14.
  • a vibration sensor 320 is positioned on the inside bottom housing surface 114 in the head region 150.
  • a method of validating a test slot 10 of a disk drive testing system 5 includes establishing electrical communication between a disk drive emulator 100 and the test slot 10, and performing diagnostic testing on the test slot 10 (e.g. via the testing circuit 200 of the disk drive emulator 100 described above).
  • the diagnostic testing includes testing connectivity between the disk drive emulator 100 and the test slot 10, testing power delivery from the test slot 10 to the disk drive emulator 100, monitoring a temperature level of at least one region of the disk drive emulator 100, and monitoring a vibration level of at least one region of the disk drive emulator 100.
  • performing diagnostic testing on the test slot 10 also includes monitoring a humidity level of the disk drive emulator 100.
  • testing power delivery from the test slot 10 to the disk drive emulator 100 includes testing a voltage source level, a current source level, and a current limiting capacity of the test slot 10.
  • the connected testing circuit 200 (via the interface connector 120) evaluates and/or monitors the voltage source level, the current source level, and the current limiting capacity of the test slot 10 though power pins of the test slot connector 14 (see FIG 2).
  • the method may include monitoring a temperature level of the electronics region 130, the motor region 140, and/or the head region 150. The head region 150 may also be monitored for a vibration level.
  • the testing circuit 200 monitors the temperature and vibration levels, and optionally humidity levels, though the associated temperature sensors 310, vibration sensor(s) 320, and humidity sensor(s) 330 of the sensor system 300.

Abstract

A disk drive emulator (100) for testing a test slot (10) of a disk drive testing system (5) includes an emulator housing (110), a testing circuit housed (200) in the emulator housing, and an interface connecter (120) disposed on the emulator housing and in electrical communication with the testing circuit. The disk drive emulator includes at least one sensor (310, 310B, 310M, 310T, 320, 330) in electrical communication with the testing circuit. The at least one sensor is selected from the group consisting of a temperature sensor (310, 310B, 310M, 310T), a vibration sensor (320), and a humidity sensor (330). The testing circuit is configured to test power delivery of the test slot to the disk drive emulator, monitor the at least one sensor, and monitor connector resistance between the test slot and the disk drive emulator.

Description

Disk Drive Emulator And Method Of Use Thereof
TECHNICAL FIELD
[0001 ] This disclosure relates to disk drive emulators and methods of testing test slots of disk drive testing systems.
BACKGROUND
[0002] Disk drive manufacturers typically test manufactured disk drives for compliance with a collection of requirements. Test equipment and techniques exist for testing large numbers of disk drives serially or in parallel. Manufacturers tend to test large numbers of disk drives simultaneously or in batches. Disk drive testing systems typically include one or more racks having multiple test slots that receive disk drives for testing.
[0003] The testing environment immediately around the disk drive is closely regulated. Minimum temperature fluctuations in the testing environment are critical for accurate test conditions and for safety of the disk drives. The latest generations of disk drives, which have higher capacities, faster rotational speeds and smaller head clearance, are more sensitive to vibration. Excess vibration can affect the reliability of test results and the integrity of electrical connections. Under test conditions, the drives themselves can propagate vibrations through supporting structures or fixtures to adjacent units. This vibration "cross-talking," together with external sources of vibration, contributes to bump errors, head slap and non-repetitive run-out (NRRO), which may result in lower yields and increased manufacturing costs. [0004] Test slots of disk drive testing systems require routine validation and diagnostic testing to insure that the test slots are functioning and performing properly. In general, a "gold drive" is a disk drive that has been independently validated as functioning and performing properly. The gold drive may be used to test the functionality and performance of test slots. Validating and maintaining verification of the gold drive's veracity is cumbersome and expensive. Furthermore, testing data is limited.
SUMMARY [0005] In one aspect, a disk drive emulator for testing a test slot of a disk drive testing system includes an emulator housing, a testing circuit housed in the emulator housing, and an interface connecter disposed on the emulator housing and in electrical communication with the testing circuit. The disk drive emulator includes at least one sensor in electrical communication with the testing circuit. The at least one sensor is selected from the group consisting of a temperature sensor, a vibration sensor, and a humidity sensor. The testing circuit is configured to test power delivery of the test slot to the disk drive emulator, monitor the at least one sensor, and monitor connector reliability (e.g. by monitoring connector resistance) between the test slot and the disk drive emulator. [0006] Implementations of this aspect of the disclosure may include one or more of the following features. In some implementations, the emulator housing has a width of about 70 mm and a height of between about 9.5 mm and about 19 mm. The emulator housing is substantially rectangular shaped having top and bottom broad surfaces. A temperature sensor is disposed near each corner of the top and bottom broad surfaces. In some implementations, the emulator housing defines an electronics region, a motor region, and a head region. A temperature sensor is disposed in each region. In some examples, the interface connecter comprises a universal asynchronous receiver/transmitter connector. The electrical load element may be a heat source, which in some examples is variable. In one instance, the electrical load element is a motor; however, other heat and/or vibration generating items may be used such as a piezoelectric device, etc.
[0007] In some examples, the testing circuit includes a controller in electrical communication with the at least one temperature sensor, the at least one vibration sensor, and the at least one electrical load element. The disk drive emulator may include a humidity sensor in electrical communication with the testing circuit, which is configured to monitor a humidity level of the test slot.
[0008] In another aspect, a method of validating a test slot of a disk drive testing system includes establishing electrical communication between a disk drive emulator and the test slot and performing diagnostic testing on the test slot. The diagnostic testing includes testing connectivity between the disk drive emulator and the test slot, testing power delivery from the test slot to the disk drive emulator, monitoring a temperature level of at least one region of the disk drive emulator, and monitoring a vibration level of at least one region of the disk drive emulator. [0009] Implementations of this aspect of the disclosure may include one or more of the following features. In some implementations, performing diagnostic testing on the test slot further includes monitoring a humidity level of the disk drive emulator. In some examples, testing connectivity between the disk drive emulator and the test slot includes testing a universal asynchronous receiver/transmitter connector disposed in the test slot. Testing connectivity between the disk drive emulator and the test slot may include determining a connection resistance between the disk drive emulator and the test slot. In some implementations, testing power delivery from the test slot to the disk drive emulator includes testing a voltage source level of the test slot, testing a current source level of the test slot, and testing a current limiting capacity of the test slot.
[0010] In some implementations, monitoring a temperature level of at least one region of the disk drive emulator includes monitoring a temperature level of an electronics region, a motor region, and/or a head region. Monitoring a vibration level of at least one region of the disk drive emulator includes monitoring a vibration level of the head region.
[0011 ] The disk drive emulator, in some examples, includes an emulator housing, a testing circuit housed in the emulator housing, and an interface connecter disposed on the emulator housing and in electrical communication with the testing circuit. The disk drive emulator includes at least one sensor in electrical communication with the testing circuit. The at least one sensor is selected from the group consisting of a temperature sensor, a vibration sensor, and a humidity sensor. The testing circuit is configured to test power delivery of the test slot to the disk drive emulator, monitor the at least one sensor, and monitor connector reliability (e.g. by monitoring connector resistance) between the test slot and the disk drive emulator. [0012] The details of one or more implementations of the disclosure are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the claims.
DESCRIPTION OF DRAWINGS
[0013] FIG. 1 is a perspective view of a disk drive emulator being inserted into a test slot of a disk drive testing system.
[0014] FIG. 2 is a perspective view of a test slot. [0015] FIG. 3 is a perspective view of a disk drive emulator.
[0016] FIG. 4 is a schematic view of a disk drive emulator with a testing circuit.
[0017] FIG. 5 is a schematic view of a load circuit. [0018] FIG. 6 is a side schematic view of a disk drive emulator housing that illustrates exemplary placement of temperature and vibration sensors within the emulator housing.
[0019] FIG. 7 is a top schematic view of the disk drive emulator housing shown in FIG. 6, illustrating exemplary placement of temperature and vibration sensors within the emulator housing.
[0020] Like reference symbols in the various drawings indicate like elements.
DETAILED DESCRIP TION
[0021 ] A disk drive emulator 100 emulates or simulates an actual disk drive physically (e.g. in size, appearance, amount of radiated heat and/or vibration), but operates as a diagnostics and testing tool for validating test slots 10 of disk drive testing systems 5. In the example shown in FIG. 1, a test slot 10 is mounted to a rack 20. A disk drive transporter 30 carries the disk drive emulator 100, and may be manipulated by a user or a robotic arm for insertion into a receptacle 12 of the test slot 10. The disk drive emulator 100 is placed in a test position engaged with a test slot connector 14, shown in FIG. 2.
[0022] Referring to FIG. 3, the disk drive emulator 100 includes an emulator housing 110, a testing circuit 200 (shown through a cutaway portion of the emulator housing 1 10) housed in the emulator housing 110, and an interface connecter 120 disposed on the emulator housing 1 10 and in electrical communication with the testing circuit 200. In some implementations, the emulator housing 110 has a width of about 70 mm and a height of between about 9.5 mm and about 19 mm. The interface connecter 120 is configured to mate with the test slot connector 14, and may be a universal asynchronous receiver/transmitter connector. The test slot 10 communicates with the disk drive emulator 100 via Parallel AT Attachment (a hard disk interface also known as IDE, ATA, ATAPI, UDMA and PATA), SATA, SAS (Serial Attached SCSI) and/or serial communications. The test slot 10 also supplies power (e.g. +5V and +12V) and ground to the disk drive emulator 100 through the interface connecter 120. [0023] The disk drive emulator 100 is configured to validate the test slot 10 and diagnose issues related to the health of the test slot 10. The disk drive emulator 100 tests the power supply and ground of the test slot 10, communications through the test slot connector 14, and an environmental control system of the test slot 10, which regulates temperature, humidity, and vibrations.
[0024] Referring to the schematic view of the disk drive emulator 100 in FIG.
4, the testing circuit 200 is configured to test power delivery of the test slot 10 to the disk drive emulator 100, temperature and vibration levels of the test slot 10, and connector reliability between the test slot 10 and the disk drive emulator 100 (e.g. by monitoring connector resistance). The testing circuit 200 includes a controller 210 in electrical communication with a serial communications circuit 202, which is in electrical communication with a serial communications portion 122 of the interface connector 120. The controller 210 is in electrical communication with a sensor system 300, which includes at least one temperature sensor 310 and at least one vibration sensor 320. In some examples, the sensor system 300 also includes a humidity sensor 330 in electrical communication with the controller 210 and an air flow sensor 340 to detect and indicate the volume of air being provided to the test slot
10.
[0025] The testing circuit 200 includes a power supply circuit 204 in electrical communication with a power portion 124 of the interface connector 120. The power supply circuit 204 includes a voltage regulator circuit 220 and first and second switches 222, 224, each controlling electrical communication with a respective load circuit 400 and a respective analog-to-digital converter (not shown). The switches 222, 224 are controlled by the controller 210. FIG. 5 provides an example of the load circuit 400 which includes first and second switches 402, 404 that control current delivery to a resistor 410 and a motor 420, respectively. The controller 210 controls operation of the resistor 410 and the motor 420 via their associated switches 402, 404. The load circuits 400 are calibrated for their respective power supply (e.g. +5V or +12V). The load circuits 400 are used to test that an external power source, accessed via power portion 124 of the interface connector 120, is functioning properly. The load circuits 400 or a second set of load circuits (not shown) can be used to trip a circuit breaker of the external power source, so as to test that it is functioning properly. [0026] The disk drive emulator 100 generates heat to simulate heat dissipation of an actual disk drive by activating at least one of the load circuits 400 via its corresponding switch 222, 224 and delivering current to the resistor 410 and/or motor 420, as controlled by their respective switches 402 and 404. The load circuit 400 may be operated to provide constant or variable heat generation. The disk drive emulator 100 generates vibrations to simulate vibration characteristics of an actual disk drive by activating at least one of the load circuits 400 and delivering current to the motor 420 via switch 404. In some examples, the motor 420 includes a cam 424 coupled off-centered to a drive shaft 422 of the motor 420 to generate or accentuate vibrations. The load circuit 400 is positioned in the housing 110 in a location where an actual disk drive typically generates heat and/or vibrations, such as in an electronics region 130, a motor region 140, and/or a head region 150 of the housing 110 (see FIGS. 6-7). [0027] The testing circuit 200 includes a high speed communications circuit
206 in electrical communication with a corresponding high speed communications portion 126 of the interface connector 120 (e.g. PATA, SATA, SAS). The high speed communication circuit 206 is in electrical communication with a field-programmable gate array (FPGA) 230, which is in electrical communication with the controller 210. [0028] The temperature sensors 310 and the vibration sensors 320 are positioned in the housing 110 in a location where an actual disk drive typically generates and experiences heat and vibrations, respectively. In the examples illustrated in FIGS. 6-7, the housing 1 10 has inside top and bottom surfaces 1 12, 114, an inside front surface 1 16 supporting the interface connector 120, an inside back surface 118, and inside left and right side surfaces 1 17 and 119. FIGS. 6-7 illustrate exemplary placements of the temperature sensors 310 and the vibration sensor 320 inside the housing 110. Two temperature sensors 31OT are positioned on the inside top housing surface 1 12 near each corner adjacent the inside front housing surface 1 16. Similarly, two temperature sensors 31OB are positioned on the inside bottom housing surface 114 near each corner adjacent the inside front housing surface 116. One temperature sensor 310B is positioned on the inside bottom housing surface 114 in the electronics region 130 (e.g. for sensing a temperature of nearby electronics). One temperature sensor 31OT is positioned on the inside top housing surface 112 in the motor region 140. One temperature sensor 310B is positioned on the inside bottom housing surface 114 in the head region 150. One temperature sensor 310M is positioned on the inside back side housing surface 1 18 near the head region 150. One or more temperature sensors 31OT may be positioned near corners of the inside top housing surface 1 12. One or more temperature sensors 310B may be positioned near corners of the inside bottom housing surface 1 14. A vibration sensor 320 is positioned on the inside bottom housing surface 114 in the head region 150.
[0029] A method of validating a test slot 10 of a disk drive testing system 5 includes establishing electrical communication between a disk drive emulator 100 and the test slot 10, and performing diagnostic testing on the test slot 10 (e.g. via the testing circuit 200 of the disk drive emulator 100 described above). The diagnostic testing includes testing connectivity between the disk drive emulator 100 and the test slot 10, testing power delivery from the test slot 10 to the disk drive emulator 100, monitoring a temperature level of at least one region of the disk drive emulator 100, and monitoring a vibration level of at least one region of the disk drive emulator 100. In some implementations, performing diagnostic testing on the test slot 10 also includes monitoring a humidity level of the disk drive emulator 100.
[0030] In some implementations, testing connectivity between the disk drive emulator 100 and the test slot 10 includes testing a universal asynchronous receiver/transmitter connector 14 disposed in the test slot 10. In additional implementations, testing connectivity between the disk drive emulator 100 and the test slot 10 includes determining a connection resistance between the disk drive emulator 100 and the test slot 10 (e.g. between the test slot connector 14 and the interface connector 120 of the disk drive emulator 100).
[0031 ] In some examples, testing power delivery from the test slot 10 to the disk drive emulator 100 includes testing a voltage source level, a current source level, and a current limiting capacity of the test slot 10. For example, the connected testing circuit 200 (via the interface connector 120) evaluates and/or monitors the voltage source level, the current source level, and the current limiting capacity of the test slot 10 though power pins of the test slot connector 14 (see FIG 2). [0032] While performing diagnostic testing on the test slot 10, the method may include monitoring a temperature level of the electronics region 130, the motor region 140, and/or the head region 150. The head region 150 may also be monitored for a vibration level. The testing circuit 200 monitors the temperature and vibration levels, and optionally humidity levels, though the associated temperature sensors 310, vibration sensor(s) 320, and humidity sensor(s) 330 of the sensor system 300. [0033] A number of implementations have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the disclosure. Accordingly, other implementations are within the scope of the following claims.

Claims

WHAT IS CLAIMED IS:
1. A disk drive emulator (100) for testing a test slot (10) of a disk drive testing system (5), the disk drive emulator (100) comprising: an emulator housing (110); a testing circuit (200) housed in the emulator housing (110); an interface connecter (120) disposed on the emulator housing (1 10) and in electrical communication with the testing circuit (200); at least one sensor (310, 31 OB, 31 OM, 31 OT, 320, 330) in electrical communication with the testing circuit (200), the at least one sensor (310, 310B, 310M, 310T, 320, 330) selected from the group consisting of a temperature sensor
(310, 310B, 310M, 310T), a vibration sensor (320), and a humidity sensor (330); and at least one electrical load element (400) in electrical communication with the testing circuit (200); wherein the testing circuit (200) is configured to test power delivery of the test slot (10) to the disk drive emulator (100), monitor the at least one sensor (310, 310B, 310M, 310T, 320, 330), and monitor connector reliability between the test slot (10) and the disk drive emulator (100).
2. The disk drive emulator (100) of claim 1, wherein the emulator housing (110) has a width of about 70 mm and a height of between about 9.5 mm and about 19 mm.
3. The disk drive emulator (100) of any of the previous claims, wherein the emulator housing (1 10) is substantially rectangular shaped having top and bottom broad surfaces (112, 114), a temperature sensor (310T) being disposed near each corner of the top broad surface (112) and a temperature sensor (310B) being disposed near each corner of the bottom broad surface (114).
4. The disk drive emulator (100) of any of the previous claims, wherein the emulator housing (110) defines an electronics region (130), a motor region (140), and a head region ( 150), a temperature sensor (310, 31 OB, 31 OT) being disposed in each region (130, 140, 150).
5. The disk drive emulator (100) of any of the previous claims, wherein the interface connecter (120) comprises a universal asynchronous receiver/transmitter connector.
6. The disk drive emulator (100) of any of the previous claims, wherein the electrical load element (400) comprises a heat source or a motor.
7. The disk drive emulator (100) of claim 6, wherein the electrical load element (400) is variable.
8. The disk drive emulator (100) of any of the previous claims, wherein the testing circuit (200) comprises a controller (210) in electrical communication with the at least one sensor (310, 310B, 310M, 310T, 320, 330) and the at least one electrical load element (400).
9. A method of validating a test slot (10) of a disk drive testing system (5), the method comprising: establishing electrical communication between a disk drive emulator (100) and the test slot (10); and performing diagnostic testing on the test slot (10), the diagnostic testing comprising: testing connectivity between the disk drive emulator (100) and the test slot (10); testing power delivery from the test slot (10) to the disk drive emulator (100); monitoring a temperature level of at least one region (130, 140, 150) of the disk drive emulator (100); and monitoring a vibration level of at least one region (130, 140, 150) of the disk drive emulator (100).
10. The method of claim 9, wherein performing diagnostic testing on the test slot (10) further comprises monitoring a humidity level of the disk drive emulator (100).
1 1 . The method of claim 9 or claim 10, wherein testing connectivity between the disk drive emulator (100) and the test slot (10) comprises testing a universal asynchronous receiver/transmitter connector (14) disposed in the test slot (10) and/or determining a connection resistance between the disk drive emulator (100) and the test slot (10).
12. The method of any of claims 9-1 1 , wherein testing power delivery from the test slot (10) to the disk drive emulator (100) comprises: testing a voltage source level of the test slot (10); testing a current source level of the test slot (10); and testing a current limiting capacity of the test slot (10).
13. The method of any of claims 9- 12, wherein monitoring a temperature level of at least one region (130, 140, 150) of the disk drive emulator (100) comprises monitoring a temperature level of an electronics region (130), a motor region (140), and/or a head region (150).
14. The method of any of claims 9-13, wherein monitoring a vibration level of at least one region (130, 140, 150) of the disk drive emulator (100) comprises monitoring a vibration level of a head region (150).
15. The method of any of claims 9-14, wherein the disk drive emulator ( 100) comprises: an emulator housing (1 10); a testing circuit (200) housed in the emulator housing (1 10); an interface connecter (120) disposed on the emulator housing (110) and in electrical communication with the testing circuit (200); at least one sensor (310, 31 OB, 31 OM, 31 OT, 320, 330) in electrical communication with the testing circuit (200), the at least one sensor (310, 310B, 310M, 310T, 320, 330) selected from the group consisting of a temperature sensor
(310, 310B, 310M, 310T), a vibration sensor (320), and a humidity sensor (330); and at least one electrical load element (400) in electrical communication with the testing circuit (200); wherein the testing circuit (200) is configured to test power delivery of the test slot (10) to the disk drive emulator (100), monitor the at least one sensor (310, 310B, 310M, 310T, 320, 330), and monitor connector reliability between the test slot (10) and the disk drive emulator (100).
PCT/US2009/039591 2008-04-17 2009-04-06 Disk drive emulator and method of use thereof WO2009129072A1 (en)

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