Oracle 10g RAC reconstruction ASM and related error Solutions

I. The following error is reported when 10gRAC uses DBCA to reconstruct asm:
The ASM instance configured on the local node is a single-instance ASM. to create a single-instance database using this ASM instance, restart DBCA and select the single-instance database option, to create a RAC database using this ASM instance, convert it to rac asm first.

This is because the instance content in/etc/oratab is not removed.

II. The complete process of re-establishing the ASM instance
1. Stop the instance.
Srvctl stop asm-n o10n1
Srvctl stop asm-n o10n2

2. delete a service
Srvctl remove asm-n o10n1
Srvctl remove asm-n o10n2

3. Delete the configuration file (done on both nodes)

[Oracle @ o10n2 ~] $ Rm-f $ ORACLE_HOME/dbs/* ASM *
[Oracle @ o10n2 ~] $ Rm-fr $ ORACLE_BASE/admin/* ASM *

4. Delete the/etc/oratab instance information (done on both nodes)

5. Use dbca to recreate the asm instance

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