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    • 1. 发明授权
    • Storage system and method of control
    • 存储系统和控制方法
    • US5457791A
    • 1995-10-10
    • US57812
    • 1993-05-07
    • Yoshiko MatsumotoHisashi TakamatsuHisaharu TakeuchiYoshihiro UchiyamaMamoru TohchiHisayoshi KawabataTakao Sato
    • Yoshiko MatsumotoHisashi TakamatsuHisaharu TakeuchiYoshihiro UchiyamaMamoru TohchiHisayoshi KawabataTakao Sato
    • G11B20/10G06F3/06G06F11/10G11B20/12G11B20/18G06F11/00
    • G06F11/1076G06F11/1008G06F3/0601G11B20/1883G06F2003/0697G11B2220/20
    • A storage system comprises a disc drive unit including a plurality of logical drive groups each having a plurality of physical drives, and a disc drive control unit for controlling the information transfer between the disc drive unit and the host system. The logical data arriving from the host system is divided into a plurality of continuous data blocks, from which redundant data is prepared for data restoration. The redundant data is added to the continuous data blocks to provide updated logical data. The storage system is controlled in such a way as to write the updated logical data into a plurality of physical drives. In the case where a fault develops in any of the data blocks of the physical drives to be accessed, redundant data is generated from the updated logical data. The data block of the updated logical data of the physical drive corresponding to the data blocks that has not developed a fault, among the data blocks and the redundant data making up the updated logical data, is stored in the physical drive. The data block of the updated logical data of the physical drive corresponding to the data block that has developed a fault is stored in the nonvolatile memory. The completion of writing the updated logical data into the storage system is reported to the host system. In re-updating the updated logical data, the data block of the re-updated logical data corresponding to the data block of the physical drive that has developed a fault is stored in the physical drives. The data block stored in the nonvolatile memory are stored into an alternate block allocated to the physical drives.
    • 存储系统包括:盘驱动单元,其包括多个逻辑驱动组,每个逻辑驱动组具有多个物理驱动器;以及盘驱动器控制单元,用于控制盘驱动器单元和主机系统之间的信息传送。 从主机系统到达的逻辑数据被分成多个连续的数据块,准备冗余数据用于数据恢复。 将冗余数据添加到连续数据块以提供更新的逻辑数据。 控制存储系统以将更新后的逻辑数据写入到多个物理驱动器中。 在要访问的物理驱动器的任何数据块中发生故障的情况下,从更新的逻辑数据生成冗余数据。 在数据块和构成更新后的逻辑数据的冗余数据中,对应于未发生故障的数据块的物理驱动器的更新的逻辑数据的数据块被存储在物理驱动器中。 与发生故障的数据块对应的物理驱动器的更新逻辑数据的数据块被存储在非易失性存储器中。 将更新的逻辑数据写入存储系统的完成报告给主机系统。 在重新更新更新的逻辑数据时,对应于已经产生故障的物理驱动器的数据块的重新更新的逻辑数据的数据块被存储在物理驱动器中。 存储在非易失性存储器中的数据块被存储到分配给物理驱动器的替代块中。