ORACLE: Basic ASM Management

1. ASM Disk Type

Select 1: bare device/dev/raw/, which requires raw service support.
Select 2: asmlib management. You need to install the RPM package of asmlib in Linux and create the vol that can be recognized by ASM.

2. ASM disk management

Delete the disk member alter diskgroup dgroup1 drop disk vol2 in the disk group;
Delete a disk group drop diskgroup diskgroup1 including contents; the disk can be deleted from ASM only when the disk in the disk group is deleted.
Create diskgroup diskgroup2 external redundancy disk '/dev/raw/raw3','/dev/raw/raw4'; External redundancy is used as an example.
Add disk alter diskgroup diskgroup2 add disk '/dev/raw/raw5 ';

3. query the ASM disk group and disk members.

V $ asm_disk;
V $ asm_diskgroup;