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    • 3. 发明申请
    • DEVICE, METHOD, AND COMPUTER PROGRAM PRODUCT FOR DATA MIGRATION
    • 用于数据移动的设备,方法和计算机程序产品
    • US20110149707A1
    • 2011-06-23
    • US12643194
    • 2009-12-21
    • KAZUHIRO OZEKIShinobu FujiharaHiroshi ItagakiTakeshi Ishimoto
    • KAZUHIRO OZEKIShinobu FujiharaHiroshi ItagakiTakeshi Ishimoto
    • G11B9/00
    • G06F3/061G06F3/0647G06F3/0653G06F3/0686
    • A device, method, and computer program product are provided for migrating pieces of data from a first recording location to a second recording location based on access frequency. The device comprises an obtaining unit for obtaining, for each of the pieces of data, first information indicating the number of times any data has been read from the first recording location after the piece of data is written to the first recording location and second information indicating the number of times the piece of data has been read from the first recording location. Moreover, the device comprises a tracking unit for tracking access frequency with respect to each of the pieces of data using the first information and the second information. Furthermore, the device comprises a determining unit for determining recording positions of each of the pieces of data in the second recording location based on the tracked access frequency.
    • 提供了一种设备,方法和计算机程序产品,用于基于访问频率将数据片段从第一记录位置迁移到第二记录位置。 所述设备包括:获取单元,用于为每个所述数据获取指示在将所述数据写入所述第一记录位置之后从所述第一记录位置读取任何数据的次数的第一信息,以及指示 从第一记录位置读取数据的次数。 此外,该设备包括跟踪单元,用于使用第一信息和第二信息来跟踪相对于每条数据的访问频率。 此外,该设备包括:确定单元,用于基于跟踪的访问频率确定第二记录位置中的每个数据段的记录位置。
    • 4. 发明授权
    • Device, method, and computer program product for data migration
    • 用于数据迁移的设备,方法和计算机程序产品
    • US08009541B2
    • 2011-08-30
    • US12643194
    • 2009-12-21
    • Kazuhiro OzekiShinobu FujiharaHiroshi ItagakiTakeshi Ishimoto
    • Kazuhiro OzekiShinobu FujiharaHiroshi ItagakiTakeshi Ishimoto
    • G11B7/00G11B5/09
    • G06F3/061G06F3/0647G06F3/0653G06F3/0686
    • A device, method, and computer program product are provided for migrating pieces of data from a first recording location to a second recording location based on access frequency. The device comprises an obtaining unit for obtaining, for each of the pieces of data, first information indicating the number of times any data has been read from the first recording location after the piece of data is written to the first recording location and second information indicating the number of times the piece of data has been read from the first recording location. Moreover, the device comprises a tracking unit for tracking access frequency with respect to each of the pieces of data using the first information and the second information. Furthermore, the device comprises a determining unit for determining recording positions of each of the pieces of data in the second recording location based on the tracked access frequency.
    • 提供了一种设备,方法和计算机程序产品,用于基于访问频率将数据片段从第一记录位置迁移到第二记录位置。 所述设备包括:获取单元,用于为每个所述数据获取指示在将所述数据写入所述第一记录位置之后从所述第一记录位置读取任何数据的次数的第一信息,以及指示 从第一记录位置读取数据的次数。 此外,该设备包括跟踪单元,用于使用第一信息和第二信息来跟踪相对于每条数据的访问频率。 此外,该设备包括:确定单元,用于基于跟踪的访问频率确定第二记录位置中的每个数据段的记录位置。
    • 10. 发明申请
    • Same Wrap Backhitchless Write Method to Encode Data on a Tape Storage Medium
    • 相同的无背编写方法在磁带存储介质上编码数据
    • US20090303633A1
    • 2009-12-10
    • US12134091
    • 2008-06-05
    • Hiroshi ItagakiJames Mitchell KarpTakashi KatagiriMotoko OeYutaka Ooishi
    • Hiroshi ItagakiJames Mitchell KarpTakashi KatagiriMotoko OeYutaka Ooishi
    • G11B5/584
    • G11B5/00813G11B5/584
    • A method to write information to a tape storage medium by disposing a tape storage medium in a tape drive apparatus comprising a write head. The method moves the tape storage medium in a first direction, writes data from a buffer to the tape storage medium, and thereby empties the buffer while the tape storage medium is moving in the first direction. The method determines, while the tape storage medium is moving in the first direction, whether to enable a backhitchless write wherein the tape storage medium is not stopped and moved in a second and opposition direction, prior to writing new data to the tape storage medium. By not stopping the movement of the tape storage medium, and by not moving the tape storage medium in a reverse direction to reposition the write head, the method eliminates the time overhead required to stop the tape and reposition the tape head. Applicants' method achieves this time efficiency without adverse impact to the nominal storage capacity of the tape information medium.
    • 一种通过将带存储介质配置在包括写入头的带驱动装置中来将信息写入磁带存储介质的方法。 该方法使磁带存储介质沿第一方向移动,将数据从缓冲器写入磁带存储介质,从而在磁带存储介质沿第一方向移动时清空缓冲器。 该方法在磁带存储介质在第一方向上移动时,确定在将新数据写入磁带存储介质之前是否启用磁带存储介质在第二和相对方向上不停止和移动的无间隙写入。 通过不停止磁带存储介质的移动,并且通过不使磁带存储介质沿相反方向移动以重新定位写入头,该方法消除了停止磁带所需的时间开销并重新定位磁带头。 申请人的方法实现了这种时间效率,而不会对磁带信息介质的标称存储容量产生不利影响。