-
公开(公告)号：DE69323169T2
公开(公告)日：1999-08-05
申请号：DE69323169
申请日：1993-11-19
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , FLORYANCE GREGORY GERARD
Abstract: In a storage device, such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by an error correction code. A data type signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.
-
Patent Agency Ranking
公开(公告)号：SG46192A1
公开(公告)日：1998-02-20
申请号：SG1996000419
申请日：1991-09-06
Applicant: IBM
Inventor： BROWN DANA HENRY , CUNNINGHAM EARL ALBERT , ERICKSON KEVIN JACK , ESTRY RICHARD HUNT , GLASER THOMAS WILLIAM , HAGEN MARK DAVID , OTTESEN HAL HJALMAR , PALMER DEAN CURTIS , STEPHENSON JOHN JEFFREY
Abstract: Disclosed is an apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element (40) and write element (42). Basically, the offset is determined at a first position and at a second position of the actuator arm (48) assembly. From these offsets a constant and a multiplier are determined for determining an offset as a function of the cylinder location. Also disclosed is a method and apparatus for minimizing distance traveled to prevent misregistration when repositioning between the read element and a write element. The read element is intentionally offset from the write element at an angle so as to minimize the distance traveled across the disk.
-
公开(公告)号：BR9505660A
公开(公告)日：1997-11-04
申请号：BR9505660
申请日：1995-12-05
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , SMITH GORDON JAMES , VANLEEUWEN GEORGE WILLARD
Abstract: A method and apparatus for effectuating the reception and local storage of source information signals representative of a media program transmitted from a source information network preferably over a cable television channel on a pay-per-view basis is disclosed. A local intelligent set-top control unit communicates with a remote information network and a local storage device to coordinate the transmission of customer ordered media programs from the information network for storage on the local storage device. The local storage device is preferably a standard video cassette recorder (VCR) providing full VCR control functionality when presenting a stored media program on a television. A digital or optical data storage disk drive system may alternatively be employed to store source information signals downloaded from the remote information network. The intelligent set-top control unit communicates a pay-per-view billing signal to the information network upon playing of a downloaded media program, and provides protection against unauthorized copying. In an alternative configuration, a set-top control card is installed into a host computer system to coordinate the reception and local storage of downloaded media programs, and preferably provides a platform for interfacing with other home communication and electronic systems.
-
公开(公告)号：SG42873A1
公开(公告)日：1997-10-17
申请号：SG1996000350
申请日：1993-03-24
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , SHARMA ARUN , SRI-JAYANTHA MUGHUTHAMBY
Abstract: A method for predicting and avoiding data errors by predicting disk drive read-write inhibit requirements in response to at least two parameters including a head position error and velocity with respect to the track centerline. A write or read inhibit signal is generated in response to selected combinations of these parameters to minimize soft read errors arising from track misregistration and to avoid hard errors arising from overwriting data recorded in an adjacent track. The read and write inhibit strategy is described as a pair of linguistic control rules suitable for implementation in a Fuzzy Logic Controller.
-
公开(公告)号：SG42839A1
公开(公告)日：1997-10-17
申请号：SG1996000023
申请日：1993-11-19
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , FLORYANCE GREGORY GERARD
Abstract: In a storage device, such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by an error correction code. A data type signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.
-
公开(公告)号：DE69125447D1
公开(公告)日：1997-05-07
申请号：DE69125447
申请日：1991-09-06
Applicant: IBM
Inventor： BROWN DANA HENRY , CUNNINGHAM EARL ALBERT , ERICKSON KEVIN JACK , ESTRY RICHARD HUNT , GLASER THOMAS WILLIAM , HAGEN MARK DAVID , OTTESEN HAL HJALMAR , PALMER DEAN CURTIS , STEPHENSON JOHN JEFFREY
Abstract: Disclosed is an apparatus and method for correcting for track misregistration when a slider or head assembly contains a separate read element (40) and write element (42). Basically, the offset is determined at a first position and at a second position of the actuator arm (48) assembly. From these offsets a constant and a multiplier are determined for determining an offset as a function of the cylinder location. Also disclosed is a method and apparatus for minimizing distance traveled to prevent misregistration when repositioning between the read element and a write element. The read element is intentionally offset from the write element at an angle so as to minimize the distance traveled across the disk.
-
-
-
-
-
Search Results
46
records
(took 0.018 seconds)
