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    • 14. 发明申请
    • Disk array device having snapshot simulation function
    • 具有快照仿真功能的磁盘阵列设备
    • US20050086432A1
    • 2005-04-21
    • US10968017
    • 2004-10-20
    • Tomohiro Sakai
    • Tomohiro Sakai
    • G06F3/06G06F12/08
    • G06F3/065G06F3/0605G06F3/0632G06F3/0689G06F2201/84
    • A disk array device enabling an appropriate estimation of a physical disk capacity necessary prior to introducing a snapshot function. If a valid flag of the snapshot simulation function of a specified logical volume is on at receiving a data updating request from the host 100, snapshot simulation function control means 21 inquiries with update range determination means 10 and receives notice of bits on a bitmap corresponding to a range of update data, sets corresponding bits on a bitmap of the specified logical volume of bitmap information storage means 12 by means of bitmap information updating means 11, and executes data updating processing. Upon receiving an instruction of reporting a simulation result, snapshot simulation result reporting means 22 reports a physical disk capacity of the snapshot calculated by the snapshot simulation function.
    • 磁盘阵列设备能够在引入快照功能之前对所需的物理磁盘容量进行适当的估计。 如果在接收到来自主机100的数据更新请求时指定的逻辑卷的快照模拟功能的有效标志为ON,则快照模拟功能控制装置21与更新范围确定装置10进行查询,并接收对应于 一系列更新数据,通过位图信息更新装置11设置位图信息存储装置12的指定逻辑卷的位图上的对应位,并执行数据更新处理。 快照仿真结果报告装置22接收到报告仿真结果的指令后,报告由快照仿真功能计算的快照的物理磁盘容量。
    • 15. 发明授权
    • Connection apparatus for magnetic disk device
    • 磁盘装置连接装置
    • US5699533A
    • 1997-12-16
    • US669595
    • 1996-06-24
    • Tomohiro Sakai
    • Tomohiro Sakai
    • G06F13/10G06F3/06G06F13/40G06F13/42H01J13/00
    • G06F3/0601G06F13/4022G06F2003/0692
    • A connection apparatus for a magnetic disk device is connected between a plurality of host devices and a plurality of drive devices and includes a plurality of bus connection control units respectively provided in correspondence with the host devices. Each of the bus connection control units includes a first protocol controller for individually communicating with one of the host devices by using a small computer system interface (SCSI) bus, a plurality of second protocol controllers for respectively communicating with the drive devices by using SCSI buses, a switching circuit for switching connection between the first protocol controller and the second protocol controllers, and a control circuit for, when a command including the logical unit number of a drive device is generated from one of the host devices, controlling the switching circuit in accordance with the logical unit number and switching the first protocol controller to one of the second protocol controllers regardless of another connection between the host device and the drive device. Each of the drive devices is respectively connected to the second protocol controllers corresponding to the bus connection control units via the common SCSI bus.
    • 用于磁盘设备的连接装置连接在多个主机设备和多个驱动设备之间,并且包括分别与主机设备相对应地设置的多个总线连接控制单元。 每个总线连接控制单元包括第一协议控制器,用于通过使用小型计算机系统接口(SCSI)总线与主机设备之一单独通信,多个第二协议控制器分别通过使用SCSI总线与驱动设备通信 ,用于切换第一协议控制器和第二协议控制器之间的连接的切换电路,以及控制电路,用于当从主机设备之一产生包括驱动设备的逻辑单元号的命令时,控制切换电路 根据逻辑单元号码,并且将第一协议控制器切换到第二协议控制器之一,而不管主机设备和驱动设备之间的另一连接如何。 每个驱动装置分别通过公共SCSI总线连接到对应于总线连接控制单元的第二协议控制器。