Mapping Oracle ASM disks to physical disks can be done using the /etc/init.d/oracleasm command:
# /etc/init.d/oracleasm querydisk -p ASMDISK1
This will result something like this:
Disk "ASMDISK1" is a valid ASM disk /dev/sdg: LABEL="ASMDISK1" TYPE="oracleasm" /dev/mapper/mpathy: LABEL="ASMDISK1" TYPE="oracleasm" /dev/sdn: LABEL="ASMDISK1" TYPE="oracleasm" /dev/sdu: LABEL="ASMDISK1" TYPE="oracleasm" /dev/sdab: LABEL="ASMDISK1" TYPE="oracleasm"
