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1. 发明授权

US06681290B2 Physical data layout to reduce seeks in a raid system 失效
标题翻译：物理数据布局，以减少在RAID系统中的寻求
公开(公告)号：US06681290B2
公开(公告)日：2004-01-20
申请号：US09772265
申请日：2001-01-29
申请人： William John Brower, Jr. , Carl Evan Jones , Joe Edward Smothers
发明人： William John Brower, Jr. , Carl Evan Jones , Joe Edward Smothers
IPC分类号： G06F1200
CPC分类号： G06F3/0638 , G06F3/0611 , G06F3/0689 , Y10S707/99953 , Y10S707/99955
摘要： A data storage subsystem which reduces seek time, by defining a logical storage space wherein part of the logical storage space is defined to correspond to a primary storage space of a first physical data storage device, and correspond to a secondary storage space of a second physical data storage device, and another part of the logical storage space is defined to correspond to a primary storage space of the second physical data storage device, and correspond to a secondary storage space of the first physical data storage device. For hard disk drives having an arm assembly with a read/write head, the average seek distance for both drives reduced, since the pivoting arm assembly need not travel as far to reach each physical storage address within a primary storage area. The invention may additionally take advantage of geometric or other aspects of the storage devices which result in some portion of the device having a faster access time that another portion. For hard disk drives which assign a larger number of logical blocks to the outer tracks of the disk than to the inner tracks, the storage controller can map the primary storage space of a given one of the drives to the outer tracks of the drive.
摘要翻译：一种数据存储子系统，其通过定义逻辑存储空间来减少搜索时间，其中所述逻辑存储空间的一部分被定义为对应于第一物理数据存储设备的主存储空间，并且对应于第二物理数据存储装置，并且所述逻辑存储空间的另一部分被定义为对应于所述第二物理数据存储装置的主存储空间，并且对应于所述第一物理数据存储装置的辅助存储空间。对于具有带有读/写头的臂组件的硬盘驱动器，两个驱动器的平均搜索距离减小，因为枢转臂组件不需要行进到达到主存储区域内的每个物理存储地址。本发明还可以利用存储设备的几何或其他方面，这导致设备的一些部分具有更快的访问时间，即另一部分。对于将硬盘驱动器分配到磁盘的外部磁道而不是内部磁道的磁盘驱动器，存储控制器可将给定驱动器的主存储空间映射到驱动器的外部磁道。

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