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US20110188144 |
SERVO ROUTINE FOR TRACK SEEKING IN A HARD DISK DRIVE AND HARD DISK DRIVE FOR PERFORMING THE SAME
A method for controlling a hard disk drive, includes a track seeking servo routine in which seek time is measured in a mode of the routine after the trajectory mode, the measured seek time is...
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US20110317303 |
MAGNETIC DISK DRIVE AND METHOD FOR ADJUSTING PARAMETER IN THE SAME
According to one embodiment, a magnetic disk drive includes a parameter management table, a parameter adjustment module and an interpolation module. The parameter management table stores a...
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US20090153993 |
Disk Drive Testing
A disk drive testing system includes at least one robotic arm defining a first axis substantially normal to a floor surface. The robotic arm is operable to rotate through a predetermined arc about...
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US20100328802 |
Servo Write Head Gap Width Correction
Embodiments include methods, apparatus, and systems for servo write head gap width correction. One method includes measuring a pulse mismatch for servo stripes on magnetic tape written with a servo...
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US20080239535 |
CERTIFYING WHILE SERVOWRITING MEDIA
Certifying a media while servowriting the media by formatting a full compliment of servo data in storage tracks of the media in a minimum number of passes per storage track while simultaneously...
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US20130094104 |
Head DFH protrusion shape calibration by HDI sensor
Dynamic fly height (DFH) controlled read/write heads using multiple heaters have their heater powers set within a range of ratios that allows minimum clearances to be set between the read-gap and...
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US20120287526 |
BREAKDOWN PREDICTION DEVICE, BREAKDOWN PREDICTION METHOD, AND BREAKDOWN PREDICTION PROGRAM
A breakdown prediction device of the present invention includes: a vibration measurement unit that measures vibrations generated from a device being monitored; and a signal processing unit that...
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US20100321810 |
DISK DRIVE CONFIGURED TO CALCULATE HEAD REBOUND DISTANCE
According to one embodiment, a search module searches for a timing when a moving direction of a head changes in order to detect a first timing when the head collides against a stopper of a ramp...
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US20110134557 |
REAL TIME MONITORING INCONSISTENT OPERATIONS IN A HARD DISK DRIVE
Real time monitoring inconsistent operations in a hard disk drive, wherein the hard disk drive comprises a magnetic disk, a controller and a channel clock. A timing signal from the channel clock is...
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US20120008226 |
FLY CAPABLE SLIDER TEST SOCKET
The present application is directed to a slider supporting apparatus for flying a slider of a hard disk drive in the manufacturing process to provide electrical performance characteristics. The...
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US20120008225 |
Fly Capable Slider Test Socket
The present application is directed to a slider supporting apparatus for flying a slider of a hard disk drive in the manufacturing process to provide electrical performance characteristics. The...
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US20110075286 |
SYSTEM, METHOD AND APPARATUS FOR DETERMINING TRACK PITCH IN A HARD DISK DRIVE TO SATISFY THE REQUIREMENTS OF BOTH OFF-TRACK CAPACITY AND ADJACENT TRACK ERASURE
Track pitch in a hard disk drive is selected to satisfy the requirements of both off-track capacity (OTC) and adjacent track interference (ATI). The invention separately measures the track pitch...
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US20110157736 |
INTEGRATING CONTROL OF SLIDER BIAS POTENTIAL, TOUCH-DOWN DETECTION AND FLY-HEIGHT DETERMINATION IN A HDD
A hard disk drive (HDD) including a slider. The slider includes a resistive temperature detector (RTD) configured to detect a temperature generated by one or more of slider spacing and contact with...
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US20120033318 |
PLANAR SLIDER TEST SOCKET
The present application is directed to a slider supporting apparatus for flying a slider of a hard disk drive in the manufacturing process to provide electrical performance characteristics. The...
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US20100007978 |
DETECTION OF DEFECTIVE TAPE DRIVE BY AGGREGATING READ ERROR STATISTICS
A plurality of tape drives writes a plurality of indicators corresponding to a plurality of data units on a tape, wherein an indicator indicates which tape drive of the plurality of tape drives has...
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US20090086355 |
SPINDLE STAGE FOR TESTING MAGNETIC HEAD WITH VCM MECHANISM AND AUTOMATIC MAGNETIC HEAD MOUNTING/DEMOUNTING DEVICE
To provide a spindle stage for testing a magnetic head in which high precision servo following can be performed by an inexpensive VCM mechanism without using a piezoelectric element, and to provide...
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US20080198489 |
Cartridge drive diagnostic tools
In one embodiment, a method of diagnosing an error in a cartridge drive, comprises detecting an occurrence of a defined event in a cartridge drive, in response to the defined event, initiating an...
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US20100014179 |
Media library system and method for monitoring changes in inventory of media cartridges
A method for monitoring changes in an inventory of media cartridges in a media library includes the steps of determining with a controller that the inventory of media cartridges in the media...
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US20090262444 |
Transferring Disk Drives Within Disk Drive Testing Systems
A method of transferring disk drives within a disk drive testing system includes actuating an automated transporter to retrieve multiple disk drives presented for testing, and actuating the...
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US20090153994 |
Disk Drive Transport, Clamping and Testing
A disk drive transporter, for transporting a disk drive and for mounting a disk drive within a test slot, includes a frame configured to receive and support a disk drive. The frame includes...
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US20070115579 |
Method to test a tape drive
Applicant's invention comprises a method to test a tape drive and its mid-tape recovery abilities. Applicant's method provides a tape drive, and disposes a magnetic tape in that tape drive, wherein...
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US20090262445 |
Bulk Feeding Disk Drives to Disk Drive Testing Systems
A method of supplying disk drives to a disk drive testing system includes placing a disk drive tote, carrying multiple disk drives, in a presentation position accessible to an automated transporter...
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US20100067133 |
COMMAND SUSPENSION IN RESPONSE, AT LEAST IN PART, TO DETECTED ACCELERATION AND/OR ORIENTATION CHANGE
In an embodiment, an apparatus is provided that may include circuitry to, in response at least in part to detected change in at least one of acceleration and orientation of storage, request...
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US20110216431 |
PROCESSING DISKS ON A SPIN STAND
A method of processing disks on spin stand is disclosed, the spin stand comprising a spindle motor having a rotor. A first disk is clamped to the rotor, wherein the first disk comprises a reference...
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US20090207515 |
ERROR CORRECTION CAPABILITY FOR LONGITUDINAL POSITION DATA IN A TAPE STORAGE SYSTEM
A longitudinal position (LPOS) word L(n) is encoded with error correction capability. The LPOS word includes a plurality of LPOS symbols L0(n) through Lk(n) calculated as...
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US20060066971 |
System and method for ameliorating the effects of adjacent track erasure in magnetic data storage device
To ameliorate the effects of ATE in a HDD, tracks that are potential victim tracks of an aggressor track by virtue of the victim tracks being exposed to a magnetic field associated with a write of...
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US20070097534 |
Tape drive apparatus and method
Disclosed is a method of storing data on a tape medium in at least one data recording session employing a tape drive apparatus operable to record the data in accordance with a format specifying an...
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US20060109583 |
Method and apparatus for servo writing with servo pattern examination in a disk drive
There is disclosed a servo information writing apparatus comprising a disk drive and an examination unit. The examination unit executes examination to select an adequate servo pattern as servo...
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US20090323210 |
SHROUD FOR HEAD GIMBAL ASSEMBLY TESTING
In one implementation, an assembly for testing a head gimbal assembly comprises a rotatable test disc, a mounting surface configured to mount the head gimbal assembly, and a shroud covering the...
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US20100061003 |
ROTARY DISK ECCENTRICITY MEASUREMENT METHOD, ROTARY ENCODER, AND ROTARY MEMBER CONTROL DEVICE
An eccentricity measurement method of measuring the eccentricity between a center of a connection portion of a rotary disk of a rotary encoder connected to a rotary shaft of a rotary member, and a...
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US20090161243 |
Monitoring Disk Drives To Predict Failure
Embodiments include methods, apparatus, and systems for monitoring disk drives to predict failure. One embodiment includes a disk drive having a plurality of different types of sensors that sense...
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US20100302666 |
DETECTING A PERIODIC SEQUENCE OF SERVO SIGNALS
A system and method are disclosed for detecting a periodic sequence. A value detector module detects a plurality of values of a periodic sequence. In one embodiment, a transformation module...
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US20050195510 |
Feedback-controlled optical servo writer
A system for calibrating servo marks formed in a tape medium includes an emitter for directing a beam of radiation toward the medium to form one or more servo marks. A detector detects the images...
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US20110019298 |
TESTING MAGNETIC DISK PERFORMANCE WITH A SINGLE SLIDER SIMULATING SLIDERS OF VARIOUS DISK DRIVE SYSTEMS
Magnetic disk drive systems and associated methods are described for testing magnetic disk performance for certification with a plurality of magnetic disk drive systems prior to installation. The...
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US20100134912 |
LUBRICANT DISTRIBUTION IN HARD DISK DRIVES USED FOR DIGITAL VIDEO RECORDERS
A method for utilizing idle times during read/write operations for a personal video recorder (PVR) is described. Idle times during read/write operations are predicted and then such idle times are...
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US20060023336 |
Cleaning read/write heads of a magnetic tape recording system
One embodiment of a method is provided of cleaning one or more read/write heads of a magnetic tape recording system using a magnetically recordable cleaning tape in the system. An initial target...
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US20100328801 |
DISK DRIVE
According to one embodiment, a disk drive includes a disk medium, a read controller configured to perform a read control for information in the disk medium, a determiner configured to determine...
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US20120014010 |
DETERMINING A REFERENCE WAVEFORM USED BY A CORRELATOR IN A SERVO CHANNEL
Provided are a method, servo channel, and tape drive for determining a reference waveform used by a correlator in a servo channel. Sequences of servo signal samples are provided from read servo...
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US20100290144 |
INVARIANT MULTI-DIMENSIONAL VIBRATION-RESILIENCE-SIGNATURE GENERATION SYSTEM
One embodiment of the present invention provides a system that generates vibration-resistance signatures for hard disk drives (HDDs). In this system, a set of HDDs is mechanically affixed to a disk...
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US20090310240 |
CODING TECHNIQUE FOR CORRECTING MEDIA DEFECT-RELATED ERRORS AND RANDOM ERRORS
A method of writing data on a storage medium that takes into account a condition of the storage medium. The method includes receiving data to be written on a portion of a storage medium and...
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US20120050903 |
Engaging Test Slots
In general, a test slot is engaged with automated machinery to inhibit movement of the test slot, thereby inhibiting transmission of vibration from the test slot to its surroundings. While the...
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US20120044593 |
TEMPERATURE INDUCED HEAD SKEW
One way to minimize full DC head-skew re-calibrations rendered necessary by changes in storage media drive operating temperature is to compensate for temperature-induced DC head-skew using a known...
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US20080266705 |
Servo error detection and compensation utilizing virtual data tracking servo methods
A method for detecting errors in a servo system of a magnetic storage drive includes writing a plurality of data tracks at a pitch, detecting a position of an edge of at least two of the data...
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US20100027149 |
OSCILLATION TEST FOR OFF TRACK WRITE
An enhanced oscillation test for detecting off track writing associated with a read/write head writing, on a magnetic media, a measurement track. Once the measurement track is written, a series of...
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US20120307392 |
METHOD FOR FAST RECOVERY TO A WRITE STATE
In one embodiment, a method includes sensing a servo sensor while a longitudinal tape is moved past a magnetic head, determining position error between the magnetic head and a desired position...
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US20060092544 |
Shock indicator for a data storage tape device
A data storage tape device is provided, including: a housing; a tape medium contained in the housing; and a human-perceivable shock indicator having a default status and a disrupted status, the...
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US20100079888 |
ECCENTRICITY DETERMINATION FOR A DISK
Monitoring of the eccentricity of a pre-formatted servo pattern on a disk.
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US20070025006 |
Sector format setting processing method for disk storage device and disk storage device
A disk storage device has a plurality of disk faces and a plurality of heads, in which a different S/N is improved for each head. The disk face is formatted in a sector format with which the...
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US20090225462 |
MAGNETIC TAPE DEVICE
The invention provides a magnetic tape device including a magnetic head; a drive unit; an abnormality detector for detecting an abnormality in operation of the magnetic tape; and a release unit for...
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US20090257142 |
HEAD ASSEMBLY IN A DEPOPULATED CONFIGURATION
The application relates to utilizing a head assembly, having a default boot-up head and at least one other head, in a depopulated configuration. If, during testing of the head assembly, the default...
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