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[grid@rac1 admin]$ oracleasm querydisk -p VDKBACK
Disk "VDKBACK" is a valid ASM disk
Path scan support is not available
[grid@rac1 admin]$ oracleasm querydisk -d VDKBACK
Disk "VDKBACK" is a valid ASM disk on device /dev/sdf1[8,81]