Subsystem replacement method
    5.
    发明授权
    Subsystem replacement method 有权
    子系统更换方法

    公开(公告)号:US06240494B1

    公开(公告)日:2001-05-29

    申请号:US09212410

    申请日:1998-12-16

    IPC分类号: G06F1208

    摘要: In order to enable data migration between old and new subsystems to be performed under stopless operation, a plurality of first access paths are prepared between a CPU and an old CU (old subsystem) having an old VOL and a plurality of third access paths are set between the old CU and a new CU (new subsystem) having a new VOL. The connection is switched from the first access paths of the old subsystem as a replacement source to the second access paths of the new subsystem as a replacement destination on a plurality of occasions. When the CPU accesses the new subsystem via the second access paths on the new subsystem side during the connection change, a path replacement controller relays the access to the old subsystem via the third access paths and allows the access to be processed. Data migration from the old subsystem to the new subsystem is executed after all of the first access paths are switched to the second access paths.

    摘要翻译: 为了使旧系统和新子系统之间的数据迁移能够在无级运行下进行,在CPU和具有旧VOL的旧CU(旧子系统)和多个第三访问路径被设置之间准备多个第一访问路径 在旧的CU和具有新的VOL的新的CU(新的子系统)之间。 在多个场合,连接从作为替换源的旧系统的第一访问路径切换到新子系统的第二访问路径作为替换目的地。 当CPU在连接更改期间通过新子系统侧的第二个访问路径访问新子系统时,路径更换控制器通过第三个访问路径中继对旧系统的访问,并允许访问进行处理。 在将所有第一访问路径切换到第二访问路径之后,执行从旧子系统到新子系统的数据迁移。

    Subsystem replacement method
    6.
    发明授权
    Subsystem replacement method 失效
    子系统更换方法

    公开(公告)号:US06647476B2

    公开(公告)日:2003-11-11

    申请号:US09742191

    申请日:2000-12-22

    IPC分类号: G06F1202

    摘要: In order to enable data migration between old and new subsystems to be performed under stopless operation, a plurality of first access paths and are prepared between a CPU and an old CU (old subsystem) having an old VOL and a plurality of third access paths and are set between the old CU and a new CU (new subsystem) having a new VOL. The connection is switched from the first access paths and of the old subsystem as a replacement source to the second access paths and of the new subsystem as a replacement destination on a plurality of occasions. When the CPU accesses the new subsystem via the second access paths and on the new subsystem side during the connection change, a path replacement controller relays the access to the old subsystem via the third access paths and and allows the access to be processed. Data migration from the old subsystem to the new subsystem is executed after all of the first access paths are switched to the second access paths.

    摘要翻译: 为了使得能够在无级操作下执行旧系统和新子系统之间的数据迁移,在CPU和具有旧VOL和多个第三接入路径的旧CU(旧系统)之间准备多个第一接入路径,以及 设置在旧CU和具有新VOL的新CU(新子系统)之间。 在多个场合,连接从作为替换源的第一访问路径和旧子系统切换到第二访问路径和新子系统作为替换目的地。 当CPU在连接改变期间通过第二访问路径和新的子系统侧访问新的子系统时,路径更换控制器通过第三访问路径中继对旧的子系统的访问,并且允许访问被处理。 在将所有第一访问路径切换到第二访问路径之后,执行从旧子系统到新子系统的数据迁移。