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1. 发明授权

US08880802B1 I/O control, synchronization method in a raid environment with co-existing hardware and software-based I/O paths 有权
标题翻译： I / O控制，具有共存硬件和基于软件的I / O路径的raid环境中的同步方法
公开(公告)号：US08880802B1
公开(公告)日：2014-11-04
申请号：US13212364
申请日：2011-08-18
申请人： Naveen Krishnamurthy , Robert L. Sheffield, Jr. , Rajeev Srinivasa Murthy
发明人： Naveen Krishnamurthy , Robert L. Sheffield, Jr. , Rajeev Srinivasa Murthy
IPC分类号： G06F12/00
CPC分类号： G06F12/0808 , G06F3/0611 , G06F3/0659 , G06F3/0689 , G06F11/1076 , G06F12/0804
摘要： The present invention is directed to a command block protocol which may implemented by RAID firmware for synchronizing I/Os in a RAID system which includes co-existing hardware and software-based I/O paths. The command block protocol of the present disclosure ensures that there aren't any I/Os outstanding in the fast path or any other hardware engine by making sure that the region lock (ex.—Sentinel Region Lock) is taken for the entire size of the volume. When the Sentinel Region Lock is granted, the RAID firmware may assume that there aren't any commands outstanding in the fast path hardware or pending for the region lock to be obtained. The RAID firmware would not be able to maintain integrity of user data in the absence of the new command block protocol disclosed herein.
摘要翻译：本发明涉及一种命令块协议，其可以由RAID固件实现，用于在包括共存的硬件和基于软件的I / O路径的RAID系统中同步I / O。本公开的命令块协议确保在快速路径或任何其他硬件引擎中没有出现任何I / O，确保区域锁定（例如哨兵区域锁定）是针对整个大小的音量。当授予Sentinel区域锁定时，RAID固件可以假设在快速路径硬件中没有任何未完成的命令，或者为了获得区域锁定而挂起。在没有本文公开的新命令块协议的情况下，RAID固件将无法保持用户数据的完整性。

2. 发明授权

US08583840B1 Methods and structure for determining mapping information inconsistencies in I/O requests generated for fast path circuits of a storage controller 有权
标题翻译：用于确定为存储控制器的快速路径电路生成的I / O请求中映射信息不一致的方法和结构
公开(公告)号：US08583840B1
公开(公告)日：2013-11-12
申请号：US13455826
申请日：2012-04-25
申请人： James A. Rizzo , Robert L. Sheffield, Jr. , Rajeev Srinivasa Murthy , Naveen Krishnamurthy
发明人： James A. Rizzo , Robert L. Sheffield, Jr. , Rajeev Srinivasa Murthy , Naveen Krishnamurthy
IPC分类号： G06F3/00 , G06F12/00
CPC分类号： G06F3/0613 , G06F3/0635 , G06F3/067 , G06F11/0745 , G06F11/0763 , G06F11/1076 , H04L67/1097
摘要： Methods and structure are disclosed for improved processing of fast path I/O requests in a storage controller utilizing version information embedded in the fast path I/O requests. The version information allows the storage controller to determine if the mapping information utilized by the host system in generating a fast path I/O request specifies the mapping information utilized by the storage controller. The controller comprises a fast path I/O request processing circuit tightly coupled with host system drivers for fast processing of requests directed to storage devices of a logical volume. The controller also comprises a logical volume I/O processing software stack for processing I/O requests from a host system directed to a logical volume. If the mapping information utilized by the host does not match the mapping information utilized by the storage controller, fast path I/O requests are transferred to the I/O request processing stack for subsequent processing.
摘要翻译：公开了用于利用嵌入在快速路径I / O请求中的版本信息的存储控制器中的快速路径I / O请求的改进处理的方法和结构。版本信息允许存储控制器确定主机系统在生成快速路径I / O请求时使用的映射信息是否指定存储控制器使用的映射信息。控制器包括与主机系统驱动程序紧密耦合的快速路径I / O请求处理电路，用于快速处理针对逻辑卷的存储设备的请求。控制器还包括用于处理来自指向逻辑卷的主机系统的I / O请求的逻辑卷I / O处理软件栈。如果主机使用的映射信息与存储控制器所使用的映射信息不匹配，则快速路径I / O请求被传送到I / O请求处理堆栈以用于后续处理。

3. 发明授权

US08812901B2 Methods and apparatus for marking writes on a write-protected failed device to avoid reading stale data in a RAID storage system 有权
标题翻译：在写保护的故障设备上标记写入的方法和设备，以避免在RAID存储系统中读取过时的数据
公开(公告)号：US08812901B2
公开(公告)日：2014-08-19
申请号：US13241711
申请日：2011-09-23
申请人： Robert L. Sheffield, Jr.
发明人： Robert L. Sheffield, Jr.
IPC分类号： G06F11/07
CPC分类号： G06F11/1662 , G06F11/1092 , G06F11/2094 , G06F2211/1059
摘要： Methods and apparatus for improved building of a hot spare storage device in a RAID storage system while avoiding reading of stale data from a failed storage device. In the recovery mode of the failed device, all data is write protected on the failed device. A RAID storage controller may copy as much readable data as possible from the failed device to the hot spare storage device. Unreadable data may be rebuilt using redundant information of the logical volume. Write requests directed to the failed device cause the addressed logical block address (LBA) to be marked as storing stale data. When a read request is directed to such a marked LBA, the read request returns an error status from the failed device to indicate that the data is stale. The RAID controller then rebuilds the now stale data for that LBA from redundant information of the logical volume.
摘要翻译：用于在RAID存储系统中改进构建热备用存储设备的方法和装置，同时避免从故障存储设备读取过时的数据。在故障设备的恢复模式下，所有数据在发生故障的设备上都被写保护。 RAID存储控制器可将尽可能多的可读数据从故障设备复制到热备用存储设备。可以使用逻辑卷的冗余信息重建不可读数据。针对故障设备的写请求导致寻址的逻辑块地址（LBA）被标记为存储过期数据。当读请求被引导到这样一个标记的LBA时，读请求从故障设备返回错误状态，以指示数据过时。 RAID控制器然后从逻辑卷的冗余信息重构该LBA的现在的数据。

4. 发明授权

US07093033B2 Integrated circuit capable of communicating using different communication protocols 有权
标题翻译：能够使用不同通信协议进行通信的集成电路
公开(公告)号：US07093033B2
公开(公告)日：2006-08-15
申请号：US10442705
申请日：2003-05-20
申请人： Richard C. Beckett , Robert L. Sheffield, Jr. , Pak-Lung Seto
发明人： Richard C. Beckett , Robert L. Sheffield, Jr. , Pak-Lung Seto
IPC分类号： G06F13/00
CPC分类号： G06F13/4295
摘要： A method according to one embodiment may include discovering, at least in part, by an integrated circuit of at least one communication protocol via which at least one device external to the integrated circuit is capable of communicating. In this embodiment, the integrated circuit may be capable of communicating in accordance with a plurality of different communication protocols. The method according to this embodiment may also include selecting, at least in part, by the integrated circuit of the at least one communication protocol to use to communicate with the at least one device. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.
摘要翻译：根据一个实施例的方法可以包括至少部分地由至少一个通信协议的集成电路发现，集成电路外部的至少一个设备可以通过该集成电路进行通信。在本实施例中，集成电路可以根据多种不同的通信协议进行通信。根据本实施例的方法还可以包括至少部分地由至少一个通信协议的集成电路来选择以用于与至少一个设备通信。当然，在不偏离本实施例的情况下，可以进行许多替代，变化和修改。

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