参考文章: https://support.microsoft.com/en-us/kb/2510009 http://stackoverflow.com/questions/9465451/how-can-i-determine-the-sector-size-in-windows https://blogs.msdn.microsoft.com/psssql/2011/01/13/sql-server-new-drives-use-4k-sector-size/ https://msdn.microsoft.com/en-us/library/windows/desktop/hh848035%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396 http://ask.zol.com.cn/q/16407.html http://www.cnblogs.com/diabloxl/p/4422120.html解决办法:通过fusionIO或者一些SSD磁盘的管理界面修改磁盘的参数例如惠普的fusionIO,进去管理界面,将4KB扇区大小改为512字节修改为估计Hyper-V是无法修改磁盘的物理扇区大小,那如果使用Hyper-v就只能所有副本都用Hyper-V,而不能有些副本使用物理机,有些副本使用Hyper-V跑在虚拟机里面京东IO卡为第一代产品,与目前最新采购的第三代产品 第一代产品为512字节,第三代产品为4KB Node_A:第一代产品 Node_B:第三代产品由于格式化磁盘的时候可以选择分配单元512字节~64KB,所以log block要适应文件系统的分配单元否则不能原子写入磁盘https://blogs.msdn.microsoft.com/psssql/2013/05/15/sql-serverstorage-spacesvhdx-and-4k-sector-size/ Is this safe for SQL Server?
The answer is yes. An I/O subsystem can return a larger sector size than actual, physical sector size as long as all reported values can be evenly divided by 512 bytes. 4096的块只要能被512整除就无问题 As the diagram below shows, SQL Server maintains parity on 512 byte boundaries, for the log, regardless of the reported sector size. This allows SQL Server to detect a partial write (torn behavior.) For example, if the system reported a sector size of 4K but the physical sector size was 512 bytes, the I/O subsystem is only guaranteed to flush to a 512 byte mark. If the first 4, physical sectors are flushed (2K of the 4K aligned block) and a power outage occurs, SQL Server will be able to detect the entire 4K was not properly flushed.
Microsoft SQL Server IO Internals ppt下载地址
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