You want to implement ASM for the existing database instances and define the following parameters in the parameter file of the ASM instance.
DB_UNIQUE_NAME = +ASM
ASM_POWER_LIMIT = 1
ASM_DISKSTRING = ‘/dev/dsk/*s2′,’/dev/dsk/c1*’
ASM_DISKGROUPS = dgroupA, dgroup B
LARGE_POOL_SIZE = 8MB
While starting the ASM interface, you get the following error message:
ORA-15021: parameter “asm_diskstring” is not valid in RDBMS instance.
And the instance startup fails.
What causes the instance startup to fail?
A.
ASM:DISKGROUPS cannot have two values.
B.
LARGE_POOL_SIZE should be set to lower value.
C.
ASM_POWER_LIMIT should be set to higher value.
D.
DB_NAME parameter should have been defined add set to ASM
E.
INSTANCE_TYPE parameter should have been defined add set to ASM
F.
AMS_DISKSTRING parameter should not contain any wildcard characters.
Explanation:
Some initialization parameters are specifically relevant to an ASM instance. Of those initialization parameters intended for a database instance, only a few are relevant to an ASM instance. You can set those parameters at database creation time using Database Configuration Assistant or later using Enterprise Manager. The INSTANCE_TYPE parameter must be set to ASM. This is the only required parameter. All other parameters
take suitable defaults for most environments.
REF.: Oracle(r) 10g Administrator Guide, 12-8