Sector size导致ORA-27061: waiting for async I/Os failed with root.sh

测试环境： 数据库节点系统：rhel 6.8 x86_64 数据库版本：Oracle 11.2.0.4 RAC 背景： 对比分布式存储和IBM传统存储性能对比。 共三块磁盘，冗余模式采取normal。 在安装数据库集群时，节点一执行root.sh执行失败，提示ORA-27061: waiting for async I/Os failed  with root.sh 初步怀疑由于磁盘属性或数组问题，对比两台数据库主机映射磁盘正常，权限正确。 使用grid用户读写共享盘，验证通过 dd if=/dev/urandom of=/dev/asm/asm-diskb bs=4096 count=1000 dd if= =/dev/asm/asm-diskb of=/dev/zero   bs=4096 count=1000 多次搜索无果，打算采取外部冗余，测试每块磁盘，此时分布式管理人员该问题可能由于三块共享盘sector size不一致导致。 检查分布式磁盘，发现一块磁盘sector size 是4096，其他两台为512。 [root@htdb01 ~]# fdisk -l ...... Disk /dev/mapper/c1p1: 1600.3 GB, 1600321314816 bytes 255 heads, 63 sectors/track, 194561 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 4096 bytes / 524288 bytes Disk identifier: 0x00000000 Disk /dev/mapper/c2p1: 1600.3 GB, 1600321314816 bytes 255 heads, 63 sectors/track, 194561 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 4096 bytes / 524288 bytes Disk identifier: 0x00000000 Disk /dev/mapper/c3p1: 1600.3 GB, 1600321314816 bytes 255 heads, 63 sectors/track, 194561 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 4096 bytes / 4096  bytes I/O size (minimum/optimal): 4096 bytes / 524288 bytes Disk identifier: 0x00000000 确认问题后，调整分布式系统上磁盘属性，涉及命令为hdm，软件为：hdm-core-3.3.0-25.ga-x86_64.rpm 安装后检查分布式磁盘信息： [root@yxcel03 soft]# hdm scan [1C58SDM00001F5A7HUSMR7632BHP3010023]   Product Name        = Ultrastar SN260   Device Type         = NVMe Controller   Device Path         = /dev/nvme0   UID                 = 1C58SDM00001F5A7HUSMR7632BHP3010023   Alias               = @nvme0   Vendor Name         = HGST   Model Name          = HUSMR7632BHP301   Vendor ID           = 1C58   Device ID           = 0023   NVM Subsystem UID   = 1C58SDM00001F5A7HUSMR7632BHP301 [000CCA0B018E1280]   Device Type         = NVMe Namespace   Device Path         = /dev/nvme0n1   UID                 = 000CCA0B018E1280   Alias               = @nvmens0   Parent Product Name = Ultrastar SN260   Parent Device Type  = NVMe Controller   Parent Device Path  = /dev/nvme0   Parent UID          = 1C58SDM00001F5A7HUSMR7632BHP3010023   NVM Subsystem UID   = 1C58SDM00001F5A7HUSMR7632BHP301   Namespace ID        = 1 ...... 调整磁盘sector大小 [root@htcel02 soft]# hdm format --sector-size 512 -p /dev/nvme0 This operation will erase all user data on the specified devices. Before starting this operation, unmount any mounted file systems on the devices or take the devices offline. After this operation is complete, the specified devices will be reset, which may cause other operations to be interrupted. Press 'y' to continue: y [Notes]   A system restart or shutdown is required to complete the operation.     Device Reference = /dev/nvme0 Results for format: Operation succeeded. See Notes. [root@htcel02 soft]# reboot 重启系统后，数据库集群root.sh脚本执行完成。