文档解释
ORA-27611: Smart I/O failed due to a block corruption detected on the host. The block was received from cell “string”. disk: “string”, block: “string”, disk offset: “string”
Cause: The data block indicated was corrupted on the host, but a corruption was not found on the cell.
Action: This may be due to a transient network error or a real block corruption. Check your network for any errors. Analyze the segment to which the file belongs. If there is indeed a corruption, try to restore the block using RMAN block recovery. If there is a trace file, report the errors in it to Oracle Support Services. If analyze did not report an error and network did not have any error, report the problem to Oracle Support Services as this appears to be a software error.
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ORA-27611是一个与Smart I/O有关的错误，当从某个存储单元收到的块有损坏时就会发生这种错误。它可以在诊断跟踪文件中找到。
官方解释
ORA-27611错误表明检测到一个数据块损坏或无效，并且无法处理。
常见案例
ORA-27611常常出现在Smart I/O过程中，例如使用并行查询或并行应用程序将使用Smart I/O读取多个集群时。此外，由主机传输的块可能会携带错误，从而导致此错误。
一般处理方法及步骤
1.确认错误的来源，以便了解错误的根源，以及哪些参数（例如块号，磁盘号，磁盘偏移量）。
2.检查并确认是否有数据块损坏的情况。
3.如果是由于数据块损坏的原因，则需要进行数据库恢复程序。
4.重新设计并安装高可用性技术，例如Oracle Dataguard/Oracle RAC/Oracle RMAN来确保数据可靠性。
5.最好在生产环境中安装容灾和复制，以在出现数据块损坏的情况时快速恢复。
