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    • 4. 发明授权
    • Memory system using a flash memory and method of controlling the memory
system
    • 使用闪存的存储器系统和控制存储器系统的方法
    • US5930193A
    • 1999-07-27
    • US998998
    • 1997-12-29
    • Kyosuke AchiwaAkira YamamotoHirotsugu Yamagata
    • Kyosuke AchiwaAkira YamamotoHirotsugu Yamagata
    • G06F12/16G06F12/02G11C16/02G11C16/34G11C17/00G11C8/00
    • G06F12/023G06F12/0246G06F2212/401G11C16/349
    • A memory system includes a flash memory having a plurality of individually erasable physical blocks, table section for holding the relationship in correspondence between the logical blocks allocated by the allocation section and the physical blocks first counting and managing section for counting and managing write counts of the respective logical blocks, first classifying section for classifying the logical blocks into a plurality of groups on the basis of the respective write counts of the logical blocks, erasure section for erasing data in a physical block allocated to a logical block to produce a free physical block, second counting and managing section for counting and managing the erasure counts of the respective physical blocks, second classifying section for classifying the physical blocks into a plurality of groups on the basis of the respective erasure counts of the physical blocks, control section for allocating the respective logical blocks to the physical blocks; and managing section for managing free physical blocks which are not allocated to any logical blocks.
    • 存储器系统包括具有多个可单独擦除的物理块的闪速存储器,用于保持由分配部分配的逻辑块之间的对应关系的表部分和用于计数和管理写入计数的物理块第一计数和管理部分 各个逻辑块,第一分类部分,用于根据逻辑块的相应写入计数将逻辑块分类成多个组;擦除部分,用于擦除分配给逻辑块的物理块中的数据,以产生空闲物理块 用于计数和管理各个物理块的擦除计数的第二计数和管理部分,用于根据物理块的各个擦除计数将物理块分类成多个组的第二分类部分,用于分配物理块的控制部分 相应的逻辑块到物理块; 以及用于管理不分配给任何逻辑块的空闲物理块的管理部分。
    • 5. 发明授权
    • Memory system using flash memory and method of controlling the memory
system
    • 使用闪存的内存系统和控制存储系统的方法
    • US5737742A
    • 1998-04-07
    • US495165
    • 1995-06-27
    • Kyosuke AchiwaAkira YamamotoHirotsugu Yamagata
    • Kyosuke AchiwaAkira YamamotoHirotsugu Yamagata
    • G06F12/16G06F12/02G11C16/02G11C16/34G11C17/00G06F12/00
    • G06F12/023G06F12/0246G06F2212/401G11C16/349
    • A memory system includes a flash memory having a plurality of individually erasable physical blocks, table section for holding the relationship in correspondence between the logical blocks allocated by the allocation section and the physical blocks first counting and managing section for counting and managing write counts of the respective logical blocks, first classifying section for classifying the logical blocks into a plurality of groups on the basis of the respective write counts of the logical blocks, erasure section for erasing data in a physical block allocated to a logical block to produce a free physical block, second counting and managing section for counting and managing the erasure counts of the respective physical blocks, second classifying section for classifying the physical blocks into a plurality of groups on the basis of the respective erasure counts of the physical blocks, control section for allocating the respective logical blocks to the physical blocks; and managing section for managing free physical blocks which are not allocated to any logical blocks, wherein the allocation control section performs an exchanging process as required which comprises the steps of allocating a logical block belonging to a logical block group having a larger write count to a free physical block belonging to a physical block group having a smaller erasure count and allocating a logical block belonging to a logical block group having a smaller write count to a free physical block belonging to a logical block group having a larger erasure count, increasing the service life of the memory system by preventing requests from collecting in a particular sector.
    • 存储器系统包括具有多个可单独擦除的物理块的闪速存储器,用于保持由分配部分配的逻辑块之间的对应关系的表部分和用于计数和管理写入计数的物理块第一计数和管理部分 各个逻辑块,第一分类部分,用于根据逻辑块的相应写入计数将逻辑块分类成多个组;擦除部分,用于擦除分配给逻辑块的物理块中的数据,以产生空闲物理块 用于计数和管理各个物理块的擦除计数的第二计数和管理部分,用于根据物理块的各个擦除计数将物理块分类成多个组的第二分类部分,用于分配物理块的控制部分 相应的逻辑块到物理块; 以及用于管理未被分配给任何逻辑块的空闲物理块的管理部分,其中,所述分配控制部分执行所需的交换处理,其包括以下步骤:将属于具有较大写入次数的逻辑块组的逻辑块分配给 属于具有较小擦除次数的物理块组的空闲物理块,并且将属于具有较小写入计数的逻辑块组的逻辑块分配给属于具有较大擦除次数的逻辑块组的自由物理块,增加该服务 通过防止在特定部门收集请求来记忆系统的生命。
    • 8. 发明授权
    • Computer system and data sharing method between computers
    • 计算机之间的计算机系统和数据共享方法
    • US07117249B1
    • 2006-10-03
    • US09697088
    • 2000-10-25
    • Manabu KitamuraKenji YamagamiAkira YamamotoMinoru Kosuge
    • Manabu KitamuraKenji YamagamiAkira YamamotoMinoru Kosuge
    • G06F15/167G06F17/30G06F13/00
    • G06F3/0631G06F3/0617G06F3/0646G06F3/067G06F17/30067H04L67/1097Y10S707/99953Y10S707/99955
    • A data sharing method for use in a computer system provided with a first computer, a second computer and a data storage subsystem for connection with the first and second computers is disclosed. The data storage subsystem has a plurality of memory units and a control unit for controlling the plurality of memory units. The control unit forms a paired state of a first memory unit storing data for use by the first computer and a second memory unit, the paired state being so controlled as to match the contents of the first memory unit and those of the second memory unit. When data used by the first computer are to be used by the second computer, the control unit releases the paired state between the first memory unit and the second memory unit to stop updating of the first memory unit to be reflected in the second memory unit. After that, the control unit re-maps a third memory unit used by the second computer and the second memory unit with each other, and so performs control that the access by the second computer to the third memory unit be made to the second memory unit.
    • 公开了一种用于计算机系统的数据共享方法,该计算机系统具有第一计算机,第二计算机和用于与第一和第二计算机连接的数据存储子系统。 数据存储子系统具有多个存储单元和用于控制多个存储单元的控制单元。 控制单元形成第一存储单元的配对状态,该第一存储单元存储用于由第一计算机和第二存储器单元使用的数据,所述成对状态被如此控制以匹配第一存储器单元和第二存储器单元的内容。 当由第一计算机使用的数据由第二计算机使用时,控制单元释放第一存储器单元和第二存储器单元之间的配对状态,以停止第一存储器单元的更新以反映在第二存储器单元中。 之后,控制单元重新映射由第二计算机和第二存储器单元使用的第三存储器单元,并且因此执行控制,使得第二计算机对第三存储器单元的访问被做成到第二存储器单元 。
    • 10. 发明授权
    • Storage unit and storage unit subsystem
    • 存储单元和存储单元子系统
    • US6098191A
    • 2000-08-01
    • US327158
    • 1999-06-03
    • Akira YamamotoYasutomo YamamotoManabu KitamuraTakao Satoh
    • Akira YamamotoYasutomo YamamotoManabu KitamuraTakao Satoh
    • G06F12/16G06F3/06G06F11/10G11C29/00
    • G06F11/1076G06F2211/1009
    • An intermediate value derived from old and new data record values or old and new data themselves are sent from a control unit to a disk unit which stores a parity record as information necessary for updating parity. The disk unit reads an old parity record and generates a new value of parity record based on the read old parity and the information received from the control unit. The generated new value is stored in an empty record on the storage medium to which a read/write head is first positioned after the generation of the new value and in which effective data has not been stored. In a disk array system, a time required to update the parity record due to the updating of the data record is reduced and a performance of the storage unit subsystem is improved.
    • 从旧的和新的数据记录值或旧的和新的数据本身导出的中间值从控制单元发送到存储奇偶校验记录的磁盘单元,作为更新奇偶校验所需的信息。 磁盘单元读取旧的奇偶校验记录,并根据读取的旧奇偶校验和从控制单元接收的信息生成奇偶校验记录的新值。 所生成的新值被存储在存储介质上的空记录中,该记录在读/写头首先定位在新值之后并且其中没有存储有效数据。 在磁盘阵列系统中,减少了由于数据记录的更新而更新奇偶校验记录所需的时间,并提高了存储单元子系统的性能。