[INS-20802] Automatic Storage Management Configuration Assistant Failed

Cause:

This error occurs due to lot of reasons.But in my case, it occur due to existing oratab entry

Logs

[main] [ 2021-02-02 02:43:34.856 IST ] [UsmcaLogger.logExit:124]  Exiting oracle.sysman.assistants.usmca.backend.USMInstance Method : checkAndStartupInstance
[main] [ 2021-02-02 02:43:34.856 IST ] [UsmcaLogger.logException:173]  SEVERE:method oracle.sysman.assistants.usmca.backend.USMInstance:configureASM
[main] [ 2021-02-02 02:43:34.857 IST ] [UsmcaLogger.logException:174]  An ASM Instance with SID +ASM1 is already detected. ASM failed to start. <==================== Check /apps01/base/cfgtoollogs/asmca/asmca-210202AM024322.log for details.
[main] [ 2021-02-02 02:43:34.857 IST ] [UsmcaLogger.logException:175]  java.lang.Exception: An ASM Instance with SID +ASM1 is already detected. ASM failed to start. Check /apps01/base/cfgtoollogs/asmca/asmca-210202AM024322.log for details.

Workaround:

# cat /etc/oratab
..
+ASM1:/apps01/home/11.2.0/grid/:N

After removing the oratab entry,issue got resolved

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