| Entries |
| Document | Title | Date |
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| 20080205219 | JITTER MEASURING APPARATUS AND METHOD, SIGNAL PERIOD MEASURING APPARATUS AND METHOD, AND OPTICAL DISK PLAYER - An apparatus to measure jitter of a signal read from an optical disk includes a binarization unit to binarize an input signal to generate a binary signal, an ideal signal generator to generate a noise-free ideal signal based on channel characteristics of the optical disk, and a jitter measurement unit to measure jitter of the input signal based on the binary signal and the ideal signal. | 08-28-2008 |
| 20080205220 | RECORDING APPARATUS AND RECORDING METHOD - A recording apparatus includes: a performance determining unit measuring recording speeds on each of unit data sizes recorded by plural kinds of access pattern to a storing device and generating performance information indicating results of the measurement; a recording request receiving unit receiving a recording request including data to be recorded on the storing device and information of size of said data; and a recording control unit selecting an access pattern corresponding to higher recording speed as well as the information of data size included in the recording request from the performance information and instructing the storing device to perform a recording process using the selected access pattern. | 08-28-2008 |
| 20080219117 | APPARATUS AND METHOD OF SETTING UP BIT ERROR RATE CRITERION AND APPARATUS AND METHOD OF PERFORMING BURN-IN TEST OF HARD DISK DRIVE - An apparatus and method of setting up a bit error rate (BER) criterion and an apparatus and method of performing a burn-in test using the method of setting up the BER criterion. The method of setting the BER criterion includes measuring temperatures of hard disc drives (HDDs), and changing a BER criterion in which, if the measured temperature of the HDD is higher than an optimum temperature for a burn-in test, a new BER criterion having a value greater than the BER criterion of the optimum temperature is set up, and, if the measured temperature of the HDD is lower than an optimum temperature for a burn-in test, a new BER criterion having a value less than the BER criterion of the optimum temperature is set up. | 09-11-2008 |
| 20080279066 | METHOD FOR EVALUATING SIGNAL IN OPTICAL RECORDING AND READING AND METHOD FOR OPTICAL RECORDING AND READING - A signal quality evaluation method is provided that can objectively evaluate signal quality regardless of a PRML detection method used. The signal quality evaluation method is used when recording and reading is performed by irradiating a medium with a laser beam having a wavelength of λ through an objective lens having a numerical aperture of NA. In the signal quality evaluation method, information of the difference between an ideal signal recoded in the medium and a real signal obtained by irradiating the medium with the laser beam is statistically analyzed for each signal level of the ideal signal. The evaluation of the quality of the real signal is made using the statistics obtained by the statistical analysis. | 11-13-2008 |
| 20090003162 | RECORDING APPARATUS, RECORDING/REPRODUCING SYSTEM, AND RECORDING METHOD - A recording apparatus includes: a first area generating unit generating, in a storage medium, a first recording area to which first stream data is recorded; a second area generating unit generating, in the storage medium, a second recording area to which second stream data different from the first stream data is repeatedly overwrite-recorded; a management information recording unit recording, to the storage medium, management information managing the first and second recording areas; a data recording unit recording the second stream data to the second recording area; a management information managing unit updating the management information when the second stream data is recorded, to set a partial area which is a segment of the second recording area and prevent the number of the partial areas from exceeding a predetermined value; and an area transfer unit transferring, to the first recording area, the second stream data recorded in the second recording area. | 01-01-2009 |
| 20090059750 | METHOD OF WRITING DATA TO A DISC, DISC DRIVE - The invention relates to a method of writing data to a disc (OD). The method comprising a) performing a writing action in which a first data portion is written to the disc; a2) deciding to perform b) or not and b) verifying at least part of the first data portion that is written to the disc and deciding to replace the first data portion that is written to the disc or not. Finally the method comprises c) performing a further writing action in which a second data portion is written to the disc. | 03-05-2009 |
| 20090080303 | Storage Media Housing Device - A storage media housing device includes a housing means ( | 03-26-2009 |
| 20090316546 | Storage drive performance characterization - A storage system is configured to determine a redundancy group configuration for a plurality of storage drives by grouping storage drives with a similar performance group designation together. When a storage drive is inserted, the storage system tests the performance of the storage drive. The storage drive may comprise a serial ATA (advanced technology attachment) (SATA) hard drive and/or a solid state drive. The storage system stores the result in a database. The storage system assigns the storage drive a performance group designation based on the result and groups the storage drive into a redundancy group. The storage system then displays the redundancy group configuration for the plurality of storage drives so that a storage administrator may configure the redundancy groupings of the storage drives of the storage system based on the redundancy group configuration displayed. | 12-24-2009 |
| 20100054098 | CHARACTERIZING FREQUENCY RESPONSE OF A MULTIRATE SYSTEM - Frequency response is characterized for mechanical components of a multirate system operating in a closed-loop environment. A disturbance is injected at the frequency of interest and at each of the alias frequencies thereof as an input into the multirate system, and a matrix equation composed of resulting measurements of the response of the multirate system is solved to compute the frequency response at the frequency of interest and at each of the alias frequencies. The resulting frequency response can be used to synthesize the transfer function of the entire system, which allows simulation and evaluation of the relative performance of multiple controller designs without the need for further frequency response measurements. | 03-04-2010 |
| 20100061207 | DATA STORAGE DEVICE INCLUDING SELF-TEST FEATURES - In a particular embodiment, a data storage device includes a non-volatile storage media adapted to store data and a measurement circuit adapted to measure at least one performance parameter related to the storage device during operation. The data storage device further includes logic coupled to the measurement circuit and adapted to predict a failure associated with at least a portion of the non-volatile storage media when the measured performance parameter exceeds a threshold value and to optionally perform corrective action. | 03-11-2010 |
| 20100080098 | BASEPLATE FOR USE IN PARTICLE ANALYSIS - A test baseplate is configured to support and expose at least one storage device component to particle evacuation and particle analysis. The test baseplate includes a base having an upper surface that extends between an outer peripheral wall and an inner peripheral wall and having a lower surface defined by the inner peripheral wall. The test baseplate also includes a top clamp configured to be fastened to the upper surface of the base to secure the at least one storage device component to the base. | 04-01-2010 |
| 20100085851 | METHOD AND APPARATUS FOR EVALUATING INFORMATION RECORDING MEDIUM - The present invention has an object of evaluating a recording and reproduction signal quality of a high density information recording medium by providing an index representing, in a detection signal including a plurality of pieces of edge shift information, how each edge is shifted. A signal evaluation method, usable for an information recording medium having a data sequence including a mark and a space located alternately, for generating a binary signal from a signal obtained by reproducing the data sequence using a PRML signal processing method and evaluating a likelihood of the binary signal, includes a differential metric calculation step of calculating, from the binary signal, a differential metric which is a difference of a reproduction signal from a first state transition matrix having a maximum likelihood and a second state transition matrix having a second maximum likelihood; and a step of classifying the differential metric to any of a plurality of data patterns each including at least one mark and at least one space. The data pattern classification to any of the plurality of data patterns is performed using a combination of a length of a first mark included in the data sequence and a length of a first space adjacently located immediately previous or immediately subsequent to the first mark, and is further performed using a length of a second mark which is not adjacent to the first mark and located adjacent to the first space; and thus a reproduction signal quality of the information recording medium is evaluated. | 04-08-2010 |
| 20100142344 | METHOD FOR DIRECT HEAD-DISK CLEARANCE MEASUREMENT BY SLIDER VIBRATION AND FLY HEIGHT CALIBRATION - A method models and calibrates the fly height of a slider above the disk for disk drives. The calibration scheme uses the Wallace spacing loss equation and laser doppler velocimetry to predict fly height and detect the actual fly height of the slider. The slider is vibrated at selected resonances, such as by capacitive coupling to the disk, and the fly height is gradually reduced. In one version, contact between the slider and disk may be detected using an arm electronics sensor. The amplitude of mean-to-peak, vibration detection is used as an indication of the actual fly height and to calibrate the modeled fly height. | 06-10-2010 |
| 20100188946 | HEAD TESTING METHOD AND HEAD TESTING DEVICE - According to one embodiment, a head testing method, includes: positioning a protrusion against a flexure at a backside of a head slider fixed onto the flexure so that the protrusion receives the head slider from behind the head slider; positioning the head slider on a surface of a rotating magnetic disk so that the head slider faces a surface of the rotating magnetic disk, and reading magnetic information from the magnetic disk by an electromagnetic conversion element of the head slider; and outputting the magnetic information read by the electromagnetic conversion element through the wiring pattern. | 07-29-2010 |
| 20100254238 | METHOD OF OBTAINING IMAGE OF DISC AND APPARATUS FOR DRIVING DISC - Provided is a method of obtaining an image of a disc, in which the method obtains an image of an analysis or test result object of a disc by minimizing a difference between the positionings of a magnet of the disc and a magnet of a feeding unit, and an apparatus for driving a disc, wherein the apparatus performs the method. The method includes: fixing a positioning of a disc by using magnetic attraction between a first magnet installed on the disc and a second magnet installed on a feeding unit; minimizing a difference between the positionings of the first and second magnets; and obtaining an image of an analysis or test result object of the disc. | 10-07-2010 |
| 20100296376 | OPTICAL DISC DEVICE - An optical disc device including: a light source; an object lens to focus light emitted from the light source on an information recording surface of an optical disc; a movable lens that is arranged on an optical path between the light source and the objective lens and arranged such that position thereof is adjustable along a direction of a light axis; a lens moving portion to move the movable lens along the direction of the light axis; a tracking servo system which makes a beam spot that is formed of the light from the light source through focusing by the objective lens keep on track of the optical disc; and a control part which controls gain of a servo loop of the tracking servo system is made temporarily larger when the movable lens is moved by the lens moving portion in comparison with a case where moving of the movable lens by the lens moving portion is not performed. | 11-25-2010 |
| 20100315923 | MECHANICALLY DECOUPLED STATUS LENS - A disk drive includes a light source configured to emit light indicative of a disk drive status. A disk drive status light guide system for a disk drive also includes a first light pipe configured and dimensioned to mechanically couple to the disk drive and configured to directly receive and guide light emitted by the light source, and a second light pipe separate from the first light pipe, the second light pipe configured to receive and guide light from the first light pipe to a status lens visible to a user. | 12-16-2010 |
| 20110051577 | Using an Atmospheric Pressure Sensor in a Hard-Disk Drive (HDD) - Approaches for determining the likelihood that a hard-disk drive (HDD) will experience an imminent error in operation, and preventing the same, using an atmospheric pressure sensor are provided. The HDD comprises an atmospheric pressure sensor capable of determining the altitude at which the HDD is currently located. The HDD also comprises a risk assessment component capable of (a) determining an expression of how likely it is that the HDD will experience an imminent error in operation based, at least in part, upon the current altitude of the HDD, and (b) communicating the expression to a user of the HDD. The HDD may optionally comprise one or more of a particle counter, differential pressure sensor, and a chemical vapor sensor for use by the risk assessment component. If the HDD is above a particular altitude, the Thermal Fly-Height control settings of the heads may be adjusted to reduce risk of error. | 03-03-2011 |
| 20120002524 | Characterizing Frequency Response of a Multirate System - Frequency response is characterized for mechanical components of a multirate system operating in a closed-loop environment. A disturbance is injected at the frequency of interest and at each of the alias frequencies thereof as an input into the multirate system, and a matrix equation composed of resulting measurements of the response of the multirate system is solved to compute the frequency response at the frequency of interest and at each of the alias frequencies. The resulting frequency response can be used to synthesize the transfer function of the entire system, which allows simulation and evaluation of the relative performance of multiple controller designs without the need for further frequency response measurements. | 01-05-2012 |
| 20120002525 | CHARACTERIZING FREQUENCY RESPONSE OF A MULTIRATE SYSTEM - Frequency response is characterized for mechanical components of a multirate system operating in a closed-loop environment. A disturbance is injected at the frequency of interest and at each of the alias frequencies thereof as an input into the multirate system, and a matrix equation composed of resulting measurements of the response of the multirate system is solved to compute the frequency response at the frequency of interest and at each of the alias frequencies. The resulting frequency response can be used to synthesize the transfer function of the entire system, which allows simulation and evaluation of the relative performance of multiple controller designs without the need for further frequency response measurements. | 01-05-2012 |
| 20120163144 | MEASURING APPARATUS FOR HARD DISK DRIVE - A measuring apparatus includes a first connector connected to a storage controller through a second connector of a motherboard. A control circuit receives voltage signals from the storage controller and converts the voltage signals to hard disk drive (HDD) power signals. A detecting circuit includes an AND gate and first to fourth resistors. A first input terminal of the AND gate is grounded through the first resistor and connected to the control circuit through the second resistor. A second input terminal of the AND gate is grounded through the third resistor and connected to the control circuit through the fourth resistor. An output terminal of the AND gate is connected to a measuring pin of the first connector. The AND gate receives the HDD power signals and outputs a power good (PWG) signal to the measuring pin of the first connector to be measured. | 06-28-2012 |
| 20120307615 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR EXTENDED DIAGNOSTIC OVERLAY CONTROL FOR TAPE STORAGE DEVICES - According to one embodiment, a system includes a tape drive for reading from and/or writing to magnetic tape media, the tape drive having a memory and logic adapted for: monitoring parameters relating to operation of the tape drive to collect data from the operation of the tape drive, receiving a specification of an owner interface comprising a source of specifiable parameters, receiving one or more user-specified parameters from the owner interface to log during a collection window, logging at least some of the data collected from the operation of the tape drive to the memory during the collection window, wherein the at least some of the data collected is stored in a tape map including a plurality of fields, and dynamically overlaying one or more fields from the plurality of fields with data collected from the one or more user-specified parameters. The plurality of fields includes at least one histogram field, at least one per-channel field, and at least one per-channel indicator field. | 12-06-2012 |
| 20130083638 | METHODS FOR PREDICTING TAPE DRIVE AND MEDIA FAILURES - A method for monitoring and predicting health of tape drives and media in a tape library. The method includes receiving exchange data associated with an exchange in the tape library. Then the method includes, with an analytics module, processing the exchange data to determine gain types for the exchange. Based on the gain type, a health gain value is assigned to a tape drive and media and current suspicion level values are independently assigned to the tape drive and the media. The method includes assigning a first health indicator to the media and a second health indicator to the tape drive based on these two suspicion level values. In some embodiments of the method, the current suspicion level value calculating step includes summing the health gain value with a number of health gain values assigned to the tape drive and the media for up to a predefined number of monitored exchanges. | 04-04-2013 |
| 20130083639 | DATA STORAGE TAPE ANALYTICS METHOD AND SYSTEM - A system for monitoring and analyzing operation of a tape infrastructure. The system includes a plurality of real and virtual tape libraries each including a plurality of tape drives and tape media. The system includes a server linked to the tape library. On the server, a storage tape analytics application is provided that functions to extract raw data sets from the tape library corresponding to operations of the tape library. The data pertains to use of the drives and media during data storage operations and data about the activities of the real or virtual tape libraries. The analytics application stores the extracted data sets in an analytics database. The analytics application provides a user interface for viewing data in the analytics database, e.g., a GUI operable by monitoring personnel to view and interact with the gathered and processed tape operations monitoring data to provide historical and user-driven analysis of data for an entire data center. | 04-04-2013 |
| 20130107687 | METHODS AND APPARATUS FOR VALIDATING DETECTION OF RRO ADDRESS MARKS | 05-02-2013 |
| 20130107688 | BACKPLANE WITH ENERGY SAVING FUNTION | 05-02-2013 |
| 20130142023 | METHOD FOR EXTENDED DIAGNOSTIC OVERLAY CONTROL FOR TAPE STORAGE DEVICES - According to one embodiment, a method includes monitoring a plurality of parameters relating to operation of a tape drive to collect data from the operation of the tape drive, receiving a specification of one or more user-specified parameters to log during one or more collection windows, wherein the one or more user-specified parameters are specified from the plurality of parameters, logging at least some of the data collected from the operation of the tape drive to a memory during the one or more collection windows, wherein the at least some of the data collected is stored in a tape map comprising a plurality of fields, the plurality of fields including at least one histogram field, at least one per-channel field, and at least one per-channel indicator field, and dynamically overlaying one or more fields from the plurality of fields with data collected from the one or more user-specified parameters. | 06-06-2013 |
| 20140119166 | System Circuit Board and Computer - A system circuit board and a computer are presented. The system circuit board includes a processor and a hard disk (HD) indicator circuit. The HD indicator circuit includes a first switch, a first light-emitting diode, a second switch, a second light-emitting diode, an inverting circuit, and a third light-emitting diode. The first switch is electrically connected between a first pin of the processor and the first light-emitting diode. The second switch is electrically connected between a second pin of the processor and the second light-emitting diode. The inverting circuit is connected between the second pin and the third light-emitting diode. Therefore, the second light-emitting diode and the third light-emitting diode share the second pin, so that the processor can execute more functions, and the number of resistors required by the HD indicator circuit is reduced. | 05-01-2014 |
| 20140146648 | STORAGE TAPE ANALYTICS USER INTERFACE PROVIDING LIBRARY HEALTH ANALYSIS AND MONITORING ALERTS - A method of accessing tape storage analytics data from tape libraries. The method includes generating user interfaces on client devices. Each user interface includes a first screen displaying graphics or analysis tables based on the tape storage analytics data. The method includes receiving user input selecting the displayed graphics or an item within a cell of the analysis table and modifying the user interface to display a second screen, which presents a subset of the tape storage analytics data corresponding to operation of at least one of one or more tape libraries or library components (e.g., robots and elevators), tape drives, and tape media within the tape libraries or, alternatively, activities involving any of a combination of these components. The receiving and modifying steps are repeated to navigate between data corresponding to a tape library, a tape drive, and media and to operations involving these and other tape library components. | 05-29-2014 |
| 20140219071 | FAILURE PREDICTION METHOD AND FAILURE PREDICTION SYSTEM - A failure prediction system for performing failure prediction to a monitoring target device by detecting a state, comprising: a state detection unit for detecting state signals of no smaller than two different kinds, and outputting a detection signal corresponding to each of the state signals; a phase processing part for synchronizing a plurality of the detection signals; a signal analysis part for calculating a feature value indicating a feature of the state for each of the detection signals from the phase processing part; and a failure prediction part for performing failure prediction of the monitoring target device for each of the feature values by comparing the feature value in question and a reference value set in advance. | 08-07-2014 |
| 20140269240 | DRIVE CARRIER SUBSTRATE - A drive carrier includes a substrate, a computing device located on the substrate, an electrical interface located on the substrate, and a light source located on the substrate and communicatively coupled to the computing device. The computing device is to control illumination of the light source. | 09-18-2014 |
| 20150078148 | EXTENDED DIAGNOSTIC OVERLAY CONTROL FOR TAPE STORAGE DEVICES - A method according to one embodiment includes monitoring a plurality of parameters relating to operation of a tape drive to collect data from the operation of the tape drive. A specification of one or more of the parameters to log during one or more collection windows is received. At least some of the data collected from the operation of the tape drive is logged to a memory during the one or more collection windows, where the at least some of the data collected is stored in a plurality of fields. The method further includes dynamically overlaying one or more of the fields with data corresponding to the one or more specified parameters. | 03-19-2015 |
