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    • 5. 发明申请
    • Snapshot maintenance apparatus and method
    • 快照维护装置及方法
    • US20070067585A1
    • 2007-03-22
    • US11282707
    • 2005-11-21
    • Naoto UedaNaohiro FujiiKoji Honami
    • Naoto UedaNaohiro FujiiKoji Honami
    • G06F12/16
    • G06F11/2094G06F11/1451G06F2201/84
    • Provided is a snapshot maintenance apparatus and method capable of maintaining a snapshot in a highly reliability manner. In a snapshot maintenance apparatus and method for maintaining an image at the time of creating a snapshot of an operation volume for reading and writing data from and to a host system, a difference volume and a failure-situation volume are set in a connected physical device; and difference data, which is the difference formed from the operation volume at the time of creating the snapshot and the current operation volume, is sequentially saved in the difference volume according to the writing of the data from the host system in the operation volume, and the difference data is saved in the failure-situation volume when a failure occurs in the difference volume.
    • 提供了能够以高度可靠性的方式保持快照的快照维护装置和方法。 在用于在创建用于从主机系统读取和写入数据的操作卷的快照时保持图像的快照维护装置和方法中,在连接的物理设备中设置差异卷和故障状态卷 ; 并且根据在操作体积中从主机系统写入的数据,将与创建快照时的操作卷和当前操作卷形成的差异数据差异数据顺序地保存在差分卷中,以及 差异数据在差异体积中发生故障时,将不同的数据保存在故障情况下。
    • 7. 发明授权
    • Image forming apparatus
    • 图像形成装置
    • US08965257B2
    • 2015-02-24
    • US14081109
    • 2013-11-15
    • Makoto NakuraShinya TomitaNaoto UedaYoshinari OnumaMasanori Takayasu
    • Makoto NakuraShinya TomitaNaoto UedaYoshinari OnumaMasanori Takayasu
    • G03G15/01G03G15/16
    • G03G15/1615G03G15/0136G03G2215/0129
    • An image forming apparatus includes an image carrier, a transfer unit to transfer the image onto a recording medium, a torque limit unit to transmit drive force to the transfer unit at a torque less than the torque for transmitting drive force, and drive the transfer unit to rotate at a circumferential velocity higher than that of the image carrier when the image carrier and the transfer unit are in contact with each other, and a drive unit to output drive force to drive the transfer unit such that the transfer unit rotates at a circumferential velocity lower than that of the image carrier when the image carrier and the transfer unit are separate from each other, and the transfer unit rotates at a circumferential velocity higher than that of the image carrier when the image carrier and the transfer unit are in contact with each other.
    • 图像形成装置包括图像载体,将图像转印到记录介质上的转印单元,以小于传递驱动力的扭矩的转矩传递驱动力的转矩限制单元,驱动转印单元 当图像载体和转印单元彼此接触时,以比图像载体高的圆周速度旋转;以及驱动单元,其输出驱动力以驱动转印单元,使得转印单元以周向旋转 当图像载体和转印单元彼此分离时,速度低于图像载体的速度,并且当图像载体和转印单元接触时,转印单元以比图像载体高的圆周速度旋转 彼此。
    • 10. 发明申请
    • Snapshot management apparatus and method, and storage system
    • 快照管理装置及方法及存储系统
    • US20090172039A1
    • 2009-07-02
    • US12379635
    • 2009-02-26
    • Koji HonamiMotoaki SatoyamaNaohiro FujiiNaoto Ueda
    • Koji HonamiMotoaki SatoyamaNaohiro FujiiNaoto Ueda
    • G06F12/00G06F12/16G06F17/30
    • G06F17/30088G06F2201/84Y10S707/99953
    • A high-performance and highly-reliable snapshot management apparatus and method, and a storage system are provided that can prevent the adverse influence of overhead when they retain a multiplicity of snapshots. An operational volume is set in a storage area provided by a first storage apparatus and a plurality difference volumes are set in a storage area provided by a second storage apparatus. In response to data writing to the operational volume, difference data is saved in the difference volumes and management tables for it are created, with each snapshot being managed according to the management tables. Each management table is divided according to one or more snapshots in accordance with the snapshot creation time. The second and any following management tables store specified inheritance information to inherit the content of the preceding management tables.
    • 提供了一种高性能和高可靠性的快照管理装置和方法,以及一种存储系统,可以防止在保留多个快照时开销的不利影响。 在由第一存储装置提供的存储区域中设置操作卷,并且在由第二存储装置提供的存储区域中设置多个差分卷。 响应于对操作卷的数据写入,差异数据保存在差异卷中,并创建管理表,并根据管理表管理每个快照。 每个管理表根据快照创建时间根据一个或多个快照进行划分。 第二个和任何以下管理表存储指定的继承信息来继承上述管理表的内容。