公开(公告)号：US07085970B2

公开(公告)日：2006-08-01

申请号：US10201868

申请日：2002-07-23

申请人： Gareth J. Nicholls ,  Alexander H. Ainscow ,  Jon D. Garlett ,  Bobak Modaress-Razavi ,  Vernon R. Norman ,  Martin L. Schmatz

发明人： Gareth J. Nicholls ,  Alexander H. Ainscow ,  Jon D. Garlett ,  Bobak Modaress-Razavi ,  Vernon R. Norman ,  Martin L. Schmatz

IPC分类号： H03M13/00 ,  G11B27/00 ,  H04L7/00

CPC分类号： H04L7/0083 ,  G11B20/10009 ,  G11B20/14 ,  H03L7/091 ,  H03L7/095 ,  H03L2207/14

摘要： A method, in an oversampling clock and data recovery system, for detecting that sampling is stuck taking place at a data edge, by detecting a data edge in an early or a late region relative to a good region and incrementing a stuck early or stuck late counter; and if one counter reaching a maximum, setting a condition indicating that sampling is stuck taking place at a data edge. If a data edge is detected in the good region, or in each of an early and a late region in a single data period, the stuck counters are reset to zero. The detection of which stuck counter has reached a maximum can cause the moving of a sampling clock forward or backward, ending when a data edge occurs in a good region, or in each of an early region and a late region in a single data period.

摘要翻译： 在过采样时钟和数据恢复系统中，通过检测相对于良好区域的早期或晚期区域中的数据边缘并且早期或卡滞的延迟增加来检测在数据边缘处发生采样的方法 计数器; 并且如果一个计数器达到最大值，则设置指示在数据边缘发生采样的条件。 如果在单个数据周期内的良好区域或早期和晚期区域的每个区域中检测到数据边缘，则卡住的计数器将重置为零。 哪个卡住的计数器的检测已经达到最大值可能导致采样时钟向前或向后移动，当数据沿出现在良好区域中时，或者在单个数据周期的早期区域和晚期区域中的每一个中结束。

公开(公告)号：US08090907B2

公开(公告)日：2012-01-03

申请号：US12169904

申请日：2008-07-09

申请人： Alexander H. Ainscow ,  John M. Clifton

发明人： Alexander H. Ainscow ,  John M. Clifton

IPC分类号： G06F12/08

CPC分类号： G06F12/0866 ,  G06F11/2064 ,  G06F11/2069 ,  G06F11/2076

摘要： A method, system, computer program product, and computer program storage device for receiving and processing I/O requests from a host device and providing data consistency in both a primary site and a secondary site, while migrating a SRC (Synchronous Peer to Peer Remote Copy) from a backend storage subsystem to a storage virtualization appliance. While transferring SRC from the backend storage subsystem to the storage virtualization appliance, all new I/O requests are saved in both a primary cache memory and a secondary cache memory, allowing a time window during which the SRC at the backend storage subsystem can be stopped and the secondary storage device is made as a readable and writable medium. The primary cache memory and secondary cache memory operates separately on each I/O request in write-through, read-write or no-flush mode.

摘要翻译： 一种方法，系统，计算机程序产品和计算机程序存储设备，用于在迁移SRC（同步对等体到对等体远程）的同时，从主站设备接收和处理I / O请求并在主站点和辅助站点中提供数据一致性 复制）从后端存储子系统到存储虚拟化设备。 在将SRC从后端存储子系统传输到存储虚拟化设备的同时，所有新的I / O请求均保存在主缓存和辅助高速缓存中，允许后端存储子系统上的SRC可以停止的时间窗 并且辅助存储设备被制成可读写的介质。 主缓冲存储器和二次高速缓存存储器以写入，读写或非刷新模式分别对每个I / O请求进行操作。

公开(公告)号：US20100011177A1

公开(公告)日：2010-01-14

申请号：US12169904

申请日：2008-07-09

申请人： Alexander H. Ainscow ,  John M. Clifton

发明人： Alexander H. Ainscow ,  John M. Clifton

IPC分类号： G06F13/00 ,  G06F12/16 ,  G06F12/08

CPC分类号： G06F12/0866 ,  G06F11/2064 ,  G06F11/2069 ,  G06F11/2076

摘要： A method, system, computer program product, and computer program storage device for receiving and processing I/O requests from a host device and providing data consistency in both a primary site and a secondary site, while migrating a SRC (Synchronous Peer to Peer Remote Copy) from a backend storage subsystem to a storage virtualization appliance. While transferring SRC from the backend storage subsystem to the storage virtualization appliance, all new I/O requests are saved in both a primary cache memory and a secondary cache memory, allowing a time window during which the SRC at the backend storage subsystem can be stopped and the secondary storage device is made as a readable and writable medium. The primary cache memory and secondary cache memory operates separately on each I/O request in write-through, read-write or no-flush mode.

摘要翻译： 一种方法，系统，计算机程序产品和计算机程序存储设备，用于在迁移SRC（同步对等体到对等体远程）的同时，从主站设备接收和处理I / O请求并在主站点和辅助站点中提供数据一致性 复制）从后端存储子系统到存储虚拟化设备。 在将SRC从后端存储子系统传输到存储虚拟化设备的同时，所有新的I / O请求均保存在主缓存和辅助高速缓存中，允许后端存储子系统上的SRC可以停止的时间窗 并且辅助存储设备被制成可读写的介质。 主缓冲存储器和二次高速缓存存储器以写入，读写或非刷新模式分别对每个I / O请求进行操作。