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1. 发明授权

US6157962A Multipath I/O storage systems with multiipath I/O request mechanisms 失效
标题翻译：具有多路径I / O请求机制的多路I / O存储系统
公开(公告)号：US6157962A
公开(公告)日：2000-12-05
申请号：US64593
申请日：1998-04-21
申请人： Paul Hodges , Michael Garwood Hurley , Norman Kenneth Ouchi , Mien Shih
发明人： Paul Hodges , Michael Garwood Hurley , Norman Kenneth Ouchi , Mien Shih
IPC分类号： G06F3/06 , G06F13/16 , G06F13/00
CPC分类号： G06F13/1642
摘要： A data processing system having multiple independent paths for communication between a host and a plurality of storage devices where each path has its own queue for servicing requests generated by the host for accessing the storage devices. Each request is assigned a unique sequential ID before it is stored, along with its unique ID, in all the queues. Each storage device has a "mailbox" register where the ID and the status of the latest request being carried out is stored. Queues are serviced and their status updated based on the content of the mailbox in each storage device. The combination of assigning a unique task ID to each request and a "mailbox" register in each storage device allows the queue in each path to be completely out of sync with each of the queues in the other paths without causing data integrity problems, duplication of requests at the device level, or a need for complex locking schemes to keep the queues in sync with each other.
摘要翻译：一种数据处理系统，具有用于主机与多个存储设备之间的通信的多个独立路径，其中每个路径具有其自己的队列，用于维护由主机生成的访问存储设备的请求。在向所有队列存储之前，每个请求被分配唯一的顺序ID及其唯一的ID。每个存储设备都有一个“邮箱”寄存器，其中存储了正在执行的最新请求的ID和状态。服务队列，并根据每个存储设备中邮箱的内容更新其状态。为每个请求分配唯一任务ID和每个存储设备中的“邮箱”寄存器的组合允许每个路径中的队列与其他路径中的每个队列完全不同步，而不会导致数据完整性问题，重复在设备级别的请求，或需要复杂的锁定方案来保持队列彼此同步。

2. 发明授权

US5787304A Multipath I/O storage systems with multipath I/O request mechanisms 失效
标题翻译：具有多路径I / O请求机制的多路I / O存储系统
公开(公告)号：US5787304A
公开(公告)日：1998-07-28
申请号：US597092
申请日：1996-02-05
申请人： Paul Hodges , Michael Garwood Hurley , Norman Kenneth Ouchi , Mien Shih
发明人： Paul Hodges , Michael Garwood Hurley , Norman Kenneth Ouchi , Mien Shih
IPC分类号： G06F3/06 , G06F13/16 , G06F13/00
CPC分类号： G06F13/1642
摘要： A data processing system having multiple independent paths for communication between a host and a plurality of storage devices where each path has its own queue for servicing requests generated by the host for accessing the storage devices. Each request is assigned a unique sequential ID before it is stored, along with its unique ID, in all the queues. Each storage device has a "mailbox" register where the ID and the status of the latest request being carried out is stored. Queues are serviced and their status updated based on the content of the mailbox in each storage device. The combination of assigning a unique task ID to each request and a "mailbox" register in each storage device allows the queue in each path to be completely out of sync with each of the queues in the other paths without causing data integrity problems, duplication of requests at the device level, or a need for complex locking schemes to keep the queues in sync with each other.
摘要翻译：一种数据处理系统，具有用于主机与多个存储设备之间的通信的多个独立路径，其中每个路径具有其自己的队列，用于维护由主机生成的访问存储设备的请求。在向所有队列存储之前，每个请求被分配唯一的顺序ID及其唯一的ID。每个存储设备都有一个“邮箱”寄存器，其中存储了正在执行的最新请求的ID和状态。服务队列，并根据每个存储设备中邮箱的内容更新其状态。为每个请求分配唯一任务ID和每个存储设备中的“邮箱”寄存器的组合允许每个路径中的队列与其他路径中的每个队列完全不同步，而不会导致数据完整性问题，重复在设备级别的请求，或需要复杂的锁定方案来保持队列彼此同步。

3. 发明授权

US5528755A Invalid data detection, recording and nullification 失效
标题翻译：无效的数据检测，记录和无效
公开(公告)号：US5528755A
公开(公告)日：1996-06-18
申请号：US995092
申请日：1992-12-22
申请人： Brent C. Beardsley , Michael T. Benhase , Susan K. Candelaria , Joel H. Cord , Michael H. Hartung , Bruce M. Henry , Paul Hodges , Paul L. Leung , Robert W. Shomler
发明人： Brent C. Beardsley , Michael T. Benhase , Susan K. Candelaria , Joel H. Cord , Michael H. Hartung , Bruce M. Henry , Paul Hodges , Paul L. Leung , Robert W. Shomler
IPC分类号： G06F11/00 , G11C29/00 , G06F11/34 , G06F7/06
CPC分类号： G11C29/88 , G06F11/004
摘要： Often in DASD subsystems, circumstances can occur which prevent the full transfer of the required data from channel to subsystem during a write operation. The disclosed methods prevents this data from later being read and treated as valid data by the host processor. This is achieved by marking data as invalid within the storage subsystem once it is determined that a channel error has occured. Subsequently, upon reading that data, the host processor can be made aware of the data invalidity and treat the data accordingly. In a second embodiment, invalid data is discarded rather than stored over the previous valid version of the data, before it is ever stored on DASD.
摘要翻译：通常在DASD子系统中，可能会发生这种情况，从而阻止在写入操作期间将所需数据从通道全部传输到子系统。所公开的方法防止该数据稍后被主机处理器读取并被视为有效数据。一旦确定出现通道错误，就可以在存储子系统内将数据标记为无效来实现。随后，在读取该数据时，可以使主机处理器知道数据无效并相应地处理数据。在第二实施例中，在将数据存储在DASD之前，无效数据被丢弃而不是先于数据的有效版本存储。