You can look in /dev/oracleasm/disks at the Major and Minor numbers, and then map that back to the major and minor numbers of the mpath devices (assuming you are using asmlib). Matt ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Allan Nelson Sent: Monday, June 09, 2008 10:16 AM To: Oracle-L Freelists Subject: Linux devices for ASM We had consultant come in and build a 3 node rac for us. I need to know how to find out which /dev/mapper/mpath devices are used in the asm diskgroup. Oracle 10gR2 10.2.0.4 RHEL 4.6 Thanks Allan