中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.016 seconds)

    RETRIEVAL FOR ZIGZAG PATTERN DATA USING MEMORY DEVICE OF TAPE CARTRIDGE
    3.
    发明专利
    RETRIEVAL FOR ZIGZAG PATTERN DATA USING MEMORY DEVICE OF TAPE CARTRIDGE 失效

    公开(公告)号：JP2000067563A

    公开(公告)日：2000-03-03

    申请号：JP19406499

    申请日：1999-07-08

    Applicant: IBM

    Inventor： FRY SCOTT MILTON ,  JOHNSON STEVEN DOUGLAS ,  WILSON STEVEN BENNETT

    IPC: G11B27/10 ,  G11B15/00 ,  G11B15/07 ,  G11B15/18 ,  G11B15/675 ,  G11B15/68 ,  G11B23/04 ,  G11B23/087 ,  G11B23/107 ,  G11B27/00 ,  G11B27/11

    Abstract: PROBLEM TO BE SOLVED: To enhance access speed and to achieve an optimum retrieval by optimally retrieving and reading the zigzag pattern data of a tape medium while processing a device block map tranferred from the memory device provided in a tape cartridge. SOLUTION: When a memory device 35 is positioned in a memory interface 60, the interface 60 transfers a device block map from the memory device 35 to a drive controller 90. The processor of the controller 90 arranges desired retrieval and read-out requests, which are to be started by a host 96, in optimal order after processing the map. Simultaneously, the servo control of a tape head 85 is excuted and a tape medium is positioned in order to be read out or written in. At the time of positioning the tape medium, the processor can start retrieval and read-out processes instantly, Data are directly transferred between the controller 90 and the host 96 via a host interface 95.

    TAPE PRE-FORMATTING WITH UNIFORM DATA STORAGE SEGMENTS SELECTIVELY MAPPED TO FIXED OR VARIABLE SIZED INDEPENDENTLY ADDRESSABLE DATA STORAGE PARTITIONS
    4.
    发明专利
    TAPE PRE-FORMATTING WITH UNIFORM DATA STORAGE SEGMENTS SELECTIVELY MAPPED TO FIXED OR VARIABLE SIZED INDEPENDENTLY ADDRESSABLE DATA STORAGE PARTITIONS 未知

    公开(公告)号：MY127467A

    公开(公告)日：2006-12-29

    申请号：MYPI9700820

    申请日：1997-02-28

    Applicant: IBM

    Inventor： BASHAM ROBERT BEVERLY ,  DAHMAN KIRBY GRANT ,  FRY SCOTT MILTON ,  JOHNSON STEVEN DOUGLAS ,  WILSON STEVEN BENNETT

    IPC: G11B20/12 ,  G11B5/008 ,  G11B5/584 ,  G11B15/087 ,  G11B27/10 ,  G11B27/32

    Abstract: VARIOUS DATA STORAGE FORMATS HELP TO EFFICIENTLY LOCATE, READ, AND WRITE USER DATA STORED ON MAGNETIC TAPE MEDIA (206). A TAPE (400. 800, 900) IS FORMATTED BY WRITING MULTIPLE SEGMENT—HEADERS (408—4 1 1), FREE FROM ANY INTERLEAVED ACCESS OF USER DATA. ADJACENT SEGMENT—HEADERS ARE SPACED BY A PREDETERMINED INTERVAL TO DEFINE MULTIPLE DATA STORAGE SEGMENTS. SEGMENT—HEADERS ALL CONTAIN A UNIQUE KEY (408C), WHICH IS COPIED INTO A KEY INDEX TO IDENTIFY VALID SEGMENTS. AFTER FORMATTING, NORMAL TAPE ACCESSES CAN BE PERFORMED. WITHOUT ERASING ANY O]D HEADERS OR DATA, A NEW FORMATTING SCHEME CAN BE ESTABLISHED BY WRITING NEW SEGMENT—HEADERS ON THE TAPE. THE NEW SEGMENT—HEADERS INCLUDE A NEW UNIQUE KEY, REPLACING THE PREVIOUS KEY IN THE KEY INDEX. PREVIOUS SEGMENT—HEADERS STORED ON THE TAPE ARE IGNORED, SINCE THEY LACK THE UPDATED KEY. SEGMENTS MAY BE SELECTIVELY GROUPED TO PROVIDE INDEPENDENTLY ADDRESSABLE PARTITIONS. MAPPING BETWEEN SEGMENTS AND PARTITIONS CAN USE A FIXED RELATIONSHIP (E.G. ONE-TO—ONE), OR EACH PARTITION MAY BE VARIABLY SIZED ACCORDING TO THE AMOUNT OF DATA TO BE STORED THEREIN. VARIABLE—SIZED PARTITIONS MAY BE AUTOMATICALLY PADDED WITH A SELECTED NUMBER OF EMPTY SEGMENTS. ANOTHER FEATURE IS FLEXIBLE—CAPACITY SCALING, WHICH DISTRIBUTES AN ORDERED SET OF DEVICE BLOCKS ON A MULTI—TRACK MAGNETIC TAPE MEDIUM. THE DEVICE BLOCKS ARE BI—DIRECTIONALLY STORED IN A CONTINUOUS CONFIGURATION OF MULTIPLE ADJACENT STACKED SERPENTINE PALTERNS OCCUPYING SOME OR ALL OF THE TAPE. THIS CONFIGURATION PERMITS SEQUENTIAL ACCESS OF ALL DEVICE BLOCKS WITHOUT ADVANCING THE TAPE MEDIUM TO SKIP OVER REGIONS BETWEEN ADJACENT DEVICE BLOCKS. (FIG. 2 )

    Tape pre-formatting with uniform data storage segments selectively mapped to fixed or variable sized independently addressable data storage partitions
    6.
    发明专利
    Tape pre-formatting with uniform data storage segments selectively mapped to fixed or variable sized independently addressable data storage partitions 未知

    公开(公告)号：SG50792A1

    公开(公告)日：1998-07-20

    申请号：SG1997000285

    申请日：1997-02-11

    Applicant: IBM

    Inventor： BASHAM ROBERT BEVERLY ,  DAHMAN KIRBY GRANT ,  FRY SCOTT MILTON ,  JOHNSON STEVEN DOUGLAS ,  WILSON STEVEN BENNETT

    IPC: G11B5/008 ,  G11B5/584 ,  G11B15/087 ,  G11B20/12 ,  G11B27/10 ,  G11B27/32 ,  G11B11/10 ,  G11B11/586

    Abstract: various data storage formats help to efficiently locate, read, and write user data stored on magnetic tape media. A tape is formatted by writing multiple segment-headers, free from any interleaved access of user data. Adjacent segment-headers are spaced by a predetermined interval to define multiple data storage segments. Segment-headers all contain a unique key, which is copied into a key index to identify valid segments. After formatting, normal tape accesses can be performed. Without erasing any old headers or data, a new formatting scheme can be established by writing new segment-headers on the tape. The new segment-headers include a new unique key, replacing the previous key in the key index. Previous segment-headers stored on the tape are ignored, since they lack the updated key. Segments may be selectively grouped to provide independently addressable partitions. Mapping between segments and partitions can use a fixed relationship (e.g. one-to-one), or each partition may be variably sized according to the amount of data to be stored therein. Variable-sized partitions may be automatically padded with a selected number of empty segments. Another feature is flexible-capacity scaling, which distributes an ordered set of device blocks on a multi-track magnetic tape medium. The device blocks are bi-directionally stored in a continuous configuration of multiple adjacent stacked serpentine patterns occupying some or all of the tape. This configuration permits sequential access of all device blocks without advancing the tape medium to skip over regions between adjacent device blocks.

    9.
    发明专利
    未知

    公开(公告)号：DE69714324T2

    公开(公告)日：2003-02-20

    申请号：DE69714324

    申请日：1997-03-06

    Applicant: IBM

    Inventor： BASHAM ROBERT BEVERLY ,  DAHMAN KIRBY GRANT ,  FRY SCOTT MILTON ,  JOHNSON STEVEN DOUGLAS ,  WILSON STEVEN BENNETT

    IPC: G11B5/008 ,  G11B5/584 ,  G11B15/087 ,  G11B20/12 ,  G11B27/10 ,  G11B27/32

    Abstract: various data storage formats help to efficiently locate, read, and write user data stored on magnetic tape media. A tape is formatted by writing multiple segment-headers, free from any interleaved access of user data. Adjacent segment-headers are spaced by a predetermined interval to define multiple data storage segments. Segment-headers all contain a unique key, which is copied into a key index to identify valid segments. After formatting, normal tape accesses can be performed. Without erasing any old headers or data, a new formatting scheme can be established by writing new segment-headers on the tape. The new segment-headers include a new unique key, replacing the previous key in the key index. Previous segment-headers stored on the tape are ignored, since they lack the updated key. Segments may be selectively grouped to provide independently addressable partitions. Mapping between segments and partitions can use a fixed relationship (e.g. one-to-one), or each partition may be variably sized according to the amount of data to be stored therein. Variable-sized partitions may be automatically padded with a selected number of empty segments. Another feature is flexible-capacity scaling, which distributes an ordered set of device blocks on a multi-track magnetic tape medium. The device blocks are bi-directionally stored in a continuous configuration of multiple adjacent stacked serpentine patterns occupying some or all of the tape. This configuration permits sequential access of all device blocks without advancing the tape medium to skip over regions between adjacent device blocks.

Patent Agency Ranking