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    Method and means for reducing device contention by random accessing and partial track staging of records according to a first DASD format but device mapped according to a second DASD format
    2.
    发明授权
    Method and means for reducing device contention by random accessing and partial track staging of records according to a first DASD format but device mapped according to a second DASD format 失效
    用于通过随机访问减少设备争用的方法和装置，以及根据第一DASD格式的记录的部分轨道分段，但是根据第二DASD格式映射的设备

    公开(公告)号：US06470421B1

    公开(公告)日：2002-10-22

    申请号：US09632413

    申请日：2000-08-04

    申请人： Thao B. Bui ,  James C. Chen ,  Chan Y. Ng

    发明人： Thao B. Bui ,  James C. Chen ,  Chan Y. Ng

    IPC分类号： G06F1200

    CPC分类号： G06F3/061 ,  G06F3/0638 ,  G06F3/065 ,  G06F3/0689 ,  G06F12/0866

    摘要： A staging method and means for both device read and update write operations in which messages and commands between a storage subsystem and a fixed-block formatted RAID array emulating a variable-length record (CKD) formatted device for both read and write operations are evaluated to ascertain whether the record addressing was random and truly in record mode. If they are in that mode, then partial track staging by the RAID array control from the fixed-block formatted HDDs to a subsystem cache or the like would reduce device contention by reading and staging less than full track.

    摘要翻译： 用于设备读取和更新写入操作的分段方法和装置，其中存储子系统和固定块格式的RAID阵列之间的消息和命令模拟用于读取和写入操作的可变长度记录（CKD）格式化的设备被评估为 确定记录寻址是否是随机的，真正的记录模式。 如果它们处于该模式，则通过RAID阵列控制从固定块格式的HDD到子系统高速缓存等的部分跟踪分级将通过读取和分期小于全部轨道来减少设备争用。