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1. 发明申请

US20040210686A1 Data processing system and storage control device used therefor 有权
公开(公告)号：US20040210686A1
公开(公告)日：2004-10-21
申请号：US10839904
申请日：2004-05-05
申请人： Hitachi, Ltd.
发明人： Isamu Kurokawa , Hiroaki Nakanishi , Masaru Tsukada , Hisaharu Takeuchi , Masahiro Kawaguchi
IPC分类号： G06F003/00
CPC分类号： G06F3/0611 , G06F3/0631 , G06F3/0689
摘要： There is provided a data processing system which, from a point of view of increasing process efficiency of the entire data processing system to exhibit a maximum effect, may assign an alias device to a logic device. The data processing system of this invention comprises a host processing device (10) and a storage control device (20) connected thereto via a communication means (50), where the storage control device (20) has a deciding means for deciding, at a time of processing an I/O request of a certain base device, whether there is a need to newly assign an alias device to the base device according to a use situation of a physical device (203). When assignment is decided as necessary, the host processing device (10) is notified of such via the communication means, and the host processing device (10) newly assigns an alias device to the base device when there is the notification from the storage control device (20).

2. 发明申请

US20040039869A1 Information processing system 失效
标题翻译：信息处理系统
公开(公告)号：US20040039869A1
公开(公告)日：2004-02-26
申请号：US10628784
申请日：2003-07-28
申请人： HITACHI, LTD.
发明人： Isamu Kurokawa , Hiroaki Nakanishi , Junichi Muto , Hisaharu Takeuchi , Masahiro Kawaguchi
IPC分类号： G06F012/00 , G06F012/14 , G06F012/16 , G06F013/00 , G06F013/28
CPC分类号： G06F12/0862 , G06F3/0656 , G06F3/0689 , G06F12/0866
摘要： A data look-ahead control is provided to realize a high cache hit rate and improves responsiveness in an information processing system. In the data look-ahead control, when it is determined that the current input/output request is an access to a specific database that was the subject of a recent input/output request and whose I/O count exceeds a predetermined value, and it is also determined that a cache memory can be occupied to some extent and that there would be no impact on other input/output requests, data including one or more blocks (logical tracks) larger than a block that is the subject of the current I/O request are loaded to the cache memory.
摘要翻译：提供数据预测控制以实现高缓存命中率并提高信息处理系统中的响应能力。在数据预先控制中，当确定当前输入/输出请求是访问作为最近输入/输出请求的主题并且其I / O计数超过预定值的特定数据库时，并且它还确定高速缓存存储器可以在一定程度上占用，并且不会对其他输入/输出请求产生影响，数据包括大于作为当前I / O的主题的块的一个或多个块（逻辑磁道） O请求被加载到高速缓存中。

3. 发明申请

US20030061407A1 Data processing system and storage control device used therefor 有权
标题翻译：数据处理系统及其使用的存储控制装置
公开(公告)号：US20030061407A1
公开(公告)日：2003-03-27
申请号：US10251495
申请日：2002-09-20
申请人： Hitachi, Ltd.
发明人： Isamu Kurokawa , Hiroaki Nakanishi , Masaru Tsukada , Hisaharu Takeuchi , Masahiro Kawaguchi
IPC分类号： G06F003/00
CPC分类号： G06F3/0611 , G06F3/0631 , G06F3/0689
摘要： There is provided a data processing system which, from a point of view of increasing process efficiency of the entire data processing system to exhibit a maximum effect, may assign an alias device to a logic device. The data processing system of this invention comprises a host processing device (10) and a storage control device (20) connected thereto via a communication means (50) , where the storage control device (20) has a deciding means for deciding, at a time of processing an I/O request of a certain base device, whether there is a need to newly assign an alias device to the base device according to a use situation of a physical device (203). When assignment is decided as necessary, the host processing device (10) is notified of such via the communication means, and the host processing device (10) newly assigns an alias device to the base device when there is the notification from the storage control device (20).
摘要翻译：提供了一种数据处理系统，从整个数据处理系统的处理效率提高到显示最大效果的角度，可以将别名设备分配给逻辑设备。本发明的数据处理系统包括经由通信装置（50）连接到其上的主机处理装置（10）和存储控制装置（20），其中存储控制装置（20）具有决定装置，用于在处理某个基本设备的I / O请求的时间，是否需要根据物理设备的使用情况将归属设备新分配给基站设备（203）。当根据需要决定分配时，经由通信装置通知主处理装置（10），并且当存在来自存储控制装置的通知时，主机处理装置（10）向基站装置新分配别名装置（20）。

4. 发明申请

US20030174562A1 Disk control apparatus and its control method 失效
标题翻译：磁盘控制装置及其控制方法
公开(公告)号：US20030174562A1
公开(公告)日：2003-09-18
申请号：US10382804
申请日：2003-03-06
申请人： HITACHI, LTD.
发明人： Masahiro Kawaguchi , Kenichi Kageura , Takao Sato
IPC分类号： G11C007/00
CPC分类号： G11B20/1883 , G11B19/04 , G11B20/10 , G11B27/36 , G11B2220/20 , G11B2220/415
摘要： A disk system that conducts diagnoses of magnetic heads at regular or irregular interval to detect occurrence of unwritable failure. The history of regions on magnetic recording media where write operations took place is managed and a region where an unwritable failure occurred is specified. Data that corresponds to the unwritable failure is recovered by taking advantage of the redundancy of a RAID system. The disk system includes a unit that, upon reading data, checks whether the data to be read was written on the magnetic recording media through a normal write function. Through this, old data is prevented from being sent to host devices as a result of unwritable failure, and unwritable failures can be dealt with without increasing the processing time to detect unwritable failures.
摘要翻译：以规则或不规则间隔进行磁头诊断的磁盘系统，以检测不可写故障的发生。管理写入操作的磁记录介质上的区域的历史，并指定发生不可写失败的区域。通过利用RAID系统的冗余来恢复对应于不可写故障的数据。磁盘系统包括一个单元，当读取数据时，通过正常的写入功能来检查要读取的数据是否被写在磁记录介质上。由此，防止旧数据由于不可写故障而被发送到主机设备，并且可以处理不可写的故障，而不增加处理时间来检测不可写的故障。

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