asm add disk to diskgroup

最新推荐文章于 2025-07-25 17:35:15 发布

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最新推荐文章于 2025-07-25 17:35:15 发布

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本文详细介绍了如何使用Oracle ASM实例将新磁盘D4添加至DGROUPA磁盘组的过程，包括自动成员化、重新平衡及耗时的文件分配单元迁移。

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Action:
Consider the following configuration: /devices/D1 is a member of disk group dgroupA. /devices/D2 is a member of disk group dgroupA. /devices/D3 is a member of disk group dgroupA. You plan to add a new disk, /devices/D4,to the disk group dgroupA. You execute the following command: SQL> ALTER DISKGROUP dgroupA ADD DISK '/devices/D*'; Editor’s notes: /devices/D1 is a member of disk group DGROUPA. /devices/D2 is a member of disk group DGROUPA. /devices/D3 is a member of disk group DGROUPA. /devices/D4 is a candidate disk. So,if you execute the command above,oracle will add a member au tomaticly. Reblanceis automatically done as disks are added, dropped, or r esized ALTER DISKGROUP dgroupA ADD DISK '/devices/D*'; 将 D4 添加到 DGROUPA 磁盘组。由于其它磁盘已经是 DGROUPA 磁盘组的成员， 因此即使它们与搜索字符串匹配，第二个语句仍将忽略这些磁盘。向磁盘 组添加磁盘时，ASM 实例将确保该磁盘是可寻址的并且可用，然后，才会对该磁 盘进行格式化并使其重新平衡。由于需要将每个文件的分配单元移到新磁盘上， 因此重新平衡过程非常耗时。