Control apparatus and method for a RAID storage subsystem
    1.
    发明公开
    Control apparatus and method for a RAID storage subsystem 失效
    Steuervorrichtung und Verfahrenfürein RAID-Untersystem

    公开(公告)号:EP0800138A1

    公开(公告)日:1997-10-08

    申请号:EP97302239.5

    申请日:1997-04-01

    Abstract: The invention provides for a method and associated apparatus operable in a RAID subsystem having redundant disk array controllers to assure dual, redundant cache consistency while permitting operation of the RAID subsystem in response to host computer (120)I/O requests. The methods and apparatus of the present invention provide for a process of initializing the redundant disk array controllers (118.1, 118.2) in response to a power-on reset cycle (or other similar reset cycles). The first controller (118.1) partially initializes for processing of host requests then awaits the partial initialization of the second controller (118.2). After a brief timeout awaiting the second controller (118.2), or in response to an erroneous initialization of the second controller (118.2), the first controller (118.1) configures itself to perform host computer (120) I/O requests in a write-through mode (bypassing cache operations) until the second controller (118.2) eventually initializes. Once both controllers (118.1, 118.2) are initialized, the redundant caches are synchronized. Finally, the initialized controllers having synchronized the redundant caches begin normal, mirrored, redundant operation. Until such time as the redundant caches are synchronized, the first controller (118.1) continues operations in response to host computer (120) I/O requests but with the degraded performance associated with the cache write-through mode.

    Abstract translation: 本发明提供了一种可在具有冗余磁盘阵列控制器的RAID子系统中操作的方法和相关联的装置,以在允许响应于主计算机(120)I / O请求的RAID子系统的操作的同时确保双冗余高速缓存一致性。 本发明的方法和装置提供了响应于上电复位周期(或其他类似的复位周期)来初始化冗余磁盘阵列控制器(118.1,118.2)的过程。 第一控制器(118.1)部分地初始化用于处理主机请求,然后等待第二控制器(118.2)的部分初始化。 在等待第二控制器(118.2)的短暂超时之后,或者响应于第二控制器(118.2)的错误初始化,第一控制器(118.1)配置自身以在写操作中执行主计算机(120)I / O请求, 直到第二控制器(118.2)最终初始化为止(旁路高速缓存操作)。 一旦两个控制器(118.1,118.2)被初始化,冗余高速缓存就被同步。 最后,同步冗余高速缓存的初始化控制器开始正常,镜像,冗余操作。 在冗余高速缓存同步之前,第一控制器(118.1)响应于主计算机(120)I / O请求继续操作,但是与缓存直写模式相关联的性能下降。

    Data transfer method and apparatus
    2.
    发明公开
    Data transfer method and apparatus 失效
    Verfahren und Vorrichtung zurDatenübertragung

    公开(公告)号:EP0744696A1

    公开(公告)日:1996-11-27

    申请号:EP96303632.2

    申请日:1996-05-21

    CPC classification number: G06F12/0804 G06F12/0866

    Abstract: The invention provides for a method of transferring data to a storage medium (39) arranged with a host computer (10) and which includes the steps of providing a controller (18) having a cache memory (33), generating a cache-flushing parameter in the host computer (10), transferring the cache-flushing parameter from the host computer (10) to the controller (18), and writing a quantity of write request data from the cache memory (33) of the controller (10) to the storage medium (39) in accordance with the cache-flushing parameter.

    Abstract translation: 本发明提供一种将数据传送到与主计算机(10)一起布置的存储介质(39)的方法,并且包括以下步骤:提供具有高速缓存存储器(33)的控制器(18),产生高速缓冲存储器刷新参数 在所述主计算机(10)中,将所述主机计算机(10)的所述高速缓存刷新参数传送到所述控制器(18),并将所述写入请求数据从所述控制器(10)的高速缓冲存储器(33)写入到 所述存储介质(39)根据所述缓存刷新参数。

Patent Agency Ranking