Matching Oracle ASM disks names with the physical devices
Quite often it’s required to find a physical device which backs up ASM disk. The easiest way a Linux administrator could accomplish that is by using oracleasm command (of course, if ASMlib was used to create them):
# oracleasm listdisks ASMARCHIVE1 ASMARCHIVE2 ASMARCHIVE3 ASMDATA1 ASMDATA2 ASMDATA3 OCR1 OCR2 VOTEDISK1 VOTEDISK2 VOTEDISK3
# oracleasm querydisk -p OCR1 Disk "OCR1" is a valid ASM disk /dev/mapper/mpath6: LABEL="OCR1" TYPE="oracleasm" /dev/sdx: LABEL="OCR1" TYPE="oracleasm" /dev/sdh: LABEL="OCR1" TYPE="oracleasm" /dev/sdan: LABEL="OCR1" TYPE="oracleasm" /dev/sdbd: LABEL="OCR1" TYPE="oracleasm"