1) on ASM instance configure disk group alter system set asm_diskstring ='ORCL:DGRAID','ORCL:DGFAIL1','ORCL:DGFAIL2' scope=both; alter system set asm_diskgroup='DGRAID','DGFAIL' scope=both; ** asm_diskstring specifies where the asm instance should look to find drives it can use. for example: '\\.\*:' means all local drives. '\\.\D:' means D: drive. 2) on ASM instance create disk group create diskgroup dgfail normal reducdancy failgroup ctl1 disk '/dev/raw/raw5' failgroup ctl2 disk '/dev/raw/raw6'; create diskgroup dgraid external redundancy disk '/dev/raw/raw3'; 3) on oracle db instance create tablespace on ASM disk group. create tablespace iotest datafile '+DGRAID/iotest.dbf' size 500m reuse extent management local uniform size 256k segment space management auto
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