Check the asm disk labelling # /etc/init.d/oracleasm querydisk /dev/sdn1 Device "/dev/sdn" is not marked as an ASM disk Create asm disk # /etc/init.d/oracleasm createdisk ARCDATA /dev/sdn1 Marking disk "ARCDATA" as an ASM disk: [ OK ] Check the asm disk labelling # /etc/init.d/oracleasm querydisk /dev/sdn1 Device "/dev/sdn1" is marked an ASM disk with the label "ARCDATA" List the asm disks present # /etc/init.d/oracleasm listdisks ARCDATA