1.Login as oracle and list ASM diskgroups
$ oracleasm listdisks
DATA1
2. Query Disk
$ oracleasm querydisk -d DATA1
Disk "DATA1" is a valid ASM disk on device [8, 33]
3. oracleasm querydisk DATA1 you will get in addition the major - minor numbers, that can be used to match the physical device,
# ls -l /dev |grep 8|grep 33
brw-r----- 1 root disk 8, 33 Aug 2 16:10 sdc1
Hope this help! Rupam
