MAGNETIC TAPE DATA STORAGE SYSTEM BUFFER MANAGEMENT
    1.
    发明申请
    MAGNETIC TAPE DATA STORAGE SYSTEM BUFFER MANAGEMENT 审中-公开
    磁带数据存储系统缓冲器管理

    公开(公告)号:WO2004107158A3

    公开(公告)日:2005-07-07

    申请号:PCT/EP2004050771

    申请日:2004-05-18

    Abstract: A sequential buffer for a magnetic tape data storage system comprises a plurality of segments. A buffer management system buffers data in the sequential buffer, conducting a data transfer process. Subsequently, some of the buffered data is maintained in some, but less than all, the segments of the buffer. Additionally, the maintained buffered data is indicated as VALID data. Thus, a subsequent process may be conducted directly using the data maintained in the buffer, and avoids moving the tape to reread the data.

    Abstract translation: 用于磁带数据存储系统的顺序缓冲器包括多个段。 缓冲器管理系统缓冲顺序缓冲器中的数据,进行数据传输过程。 随后,一些缓冲的数据被保持在缓冲器的一些但是小于全部的段中。 另外,维护的缓冲数据被指示为VALID数据。 因此,可以使用缓冲器中保存的数据直接进行后续处理,并且避免移动磁带以重新读取数据。

    ACQUISITION OF DATA FREQUENCY HAVING HIGH VARIABILITY BY DIGITAL EDGE PROCESSING

    公开(公告)号:JPH11317028A

    公开(公告)日:1999-11-16

    申请号:JP1266999

    申请日:1999-01-21

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide a frequency controlling device with digital edge processor for estimating center frequencies of recorded signals having known formats of data recorded on a CLV optical disk or a magnetic tape or the like. SOLUTION: A read-in channel 110 includes a sampling detector 118 which supplies an edge position signal (PAT) indicating positions or recorded pulse edges by sampling a recorded signal at a known rate. An edge pattern identifying device being in a frequency controlling device 65 detects whether the edge signal of the recorded signal matches a presribed element of known format or not. There are, for example, a pulse having a prescribed length in which edges are opened with a prescribed interval, a prescribed pulse pattern or a pulse or a pattern having a known position in examples of the prescribed elements. An interval counter is connected to the pattern identifying device and measures the length of the interval between edges of a coincident pulse or pattern by making the length of a sample a unit.

    CODING METHOD, MAGNETIC TAPE MEDIUM AND SYSTEM

    公开(公告)号:JPH1139623A

    公开(公告)日:1999-02-12

    申请号:JP16474198

    申请日:1998-06-12

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To decode without using massive logic in addition to servo logic by using a periodical burst pattern and respectively shifting second, fourth bursts and second, third bursts from an equal interval position in respective bursts consisting of transitions of five ways and four ways. SOLUTION: Second, fourth transitions of five transitions burst are shifted, and second, third transitions of four transitions burst are shifted for an uncoded timing base servo pattern consisting of magnetic flux transition of an equal interval recorded on a track with a continuous length at a nonparallel angle as a coded servo pattern, and then, a bit is coded. That is, they are shifted so as to come close to or part from each other to be coded to '1' '0'. Thus, the necessity that massive logic are decoded is eliminated, and a simple technique suitable for tape drive of a low end is obtained.

    Identification of servo band arranged in horizontal direction using distinguishing property of servo pattern
    6.
    发明专利
    Identification of servo band arranged in horizontal direction using distinguishing property of servo pattern 有权
    使用伺服模式的判别性质确定水平方向上的伺服带的识别

    公开(公告)号:JP2006048854A

    公开(公告)日:2006-02-16

    申请号:JP2004230667

    申请日:2004-08-06

    Abstract: PROBLEM TO BE SOLVED: To make a pattern of a separated servo band have at least one distinguishing property for a pattern of the other separated servo band in a tape having the separated servo band of a pattern arranged in the horizontal direction over the whole tape. SOLUTION: The distinguishing property enables the identification of the separated servo band. For example, a pattern of the separated servo band has the detectable transition of a different azimuth orientation such as inversion in the horizontal direction for the other servo band. In the other method, a variation quantity in the width of a gap of a pattern is given to the other servo band. In the other method, a variation quantity in the number of the detectable transition of the pattern is given to the pattern of the other servo band. COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题:为了使分离的伺服带的图案在具有在水平方向上布置的图案的分离的伺服带的带中的另一个分离的伺服带的图案上具有至少一个区别特性, 整卷

    解决方案:区分特性使得能够识别分离的伺服带。 例如,分离的伺服带的图案具有不同方位取向的可检测转变,例如在另一个伺服带的水平方向上的反转。 在另一种方法中,对另一个伺服带给出了图案间隙宽度的变化量。 在另一种方法中,将图案的可检测转变次数的变化量给予另一个伺服带的图案。 版权所有(C)2006,JPO&NCIPI

    Tape servo information provided with superimpose data information providing servo band identification
    9.
    发明专利
    Tape servo information provided with superimpose data information providing servo band identification 有权
    带有超大型数据信息的带状服务信息提供伺服带识别

    公开(公告)号:JP2006048852A

    公开(公告)日:2006-02-16

    申请号:JP2004230471

    申请日:2004-08-06

    Abstract: PROBLEM TO BE SOLVED: To provide selected and different superimpose data information to identify a separated servo band for addressablility in which the separated servo band is independent in a magnetic tape having a vertical direction servo band in which servo information provided with superimpose data information is separated. SOLUTION: Servo information has transition extended in the horizontal direction not parallel to indicate the positioning of a horizontal direction, The selected different superimpose data information can have a lack of a part of the servo band. When the superimpose data information is the position information of a vertical direction, The selected different superimpose data information can have position information in which one or a plurality of servo bands are different. The selected different superimpose data information can have a band identifier in the superimpose data information of one or the plurality of servo bands. COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题:为了提供选择和不同的叠加数据信息以识别在具有垂直方向伺服频带的磁带中分离的伺服频带独立的可分辨的伺服频带,其中提供有叠加数据的伺服信息 信息是分开的。

    解决方案:伺服信息在水平方向上的转换不平行,以指示水平方向的定位。所选择的不同叠加数据信息可能缺少伺服带的一部分。 当叠加数据信息是垂直方向的位置信息时,所选择的不同叠加数据信息可以具有其中一个或多个伺服带不同的位置信息。 所选择的不同叠加数据信息可以在一个或多个伺服带的叠加数据信息中具有频带标识符。 版权所有(C)2006,JPO&NCIPI

    SERVO-GAP DETECTOR, DETECTING METHOD AND SERVO SYSTEM

    公开(公告)号:JP2001006140A

    公开(公告)日:2001-01-12

    申请号:JP2000139485

    申请日:2000-05-12

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To effectively and precisely identify the serve gap by dividing a detected group timing gap by a specified divisor, feeding a timing interval gap detection threshold, and measuring the timing intervals between detected transition stripes. SOLUTION: A divider 170 divides a detected group B timing interval by a specified divisor to output a divided timing interval gap detection threshold. The divisor is selected by a divisor selector 174 to generate longer thresholds than the timing interval between transition stripes of burst one by one, and this involves values for generating shorter thresholds than the timing intervals of a min. interval gap at the edge of a servo pattern. A servo gap output value of a comparator 110 is fed back to an interval counter 120, and the count is fixed to latch the detection. When a pulse detector 122 detects the next stripe transition, the interval counter is reset to zero again.

Patent Agency Ranking