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本文档详细介绍了如何在Oracle RAC环境中通过ASMLib（Automatic Storage Management Library）创建ASM磁盘组。首先，需在两个节点上使用`oracleasm configure -i`进行配置并重启。接着，使用`fdisk`对磁盘进行分区，并创建ASM磁盘卷。在节点一上创建磁盘后，节点二通过扫描磁盘即可发现并使用已创建的磁盘组。最后，通过`oracleasm listdisks`验证磁盘组的创建成功。
1.首先创建共享磁盘组
https://blog.youkuaiyun.com/chenshijie2011/article/details/80594986
2.2创建ASM Disk Volumes
对磁盘需要新进行fdisk分区，在rac1上面进行分区。
[root@rac1 ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won’t be recoverable.
The number of cylinders for this disk is set to 11748.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and part
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