2 Replies Latest reply: Aug 1, 2013 7:18 AM by user130038 RSS

    Which "Disk Discovery Path" to use on RHEL?

    user130038

      Hi

       

      Environment: Oracle 10gR2 (10.2.0.5) + ASM

      Platform: RHEL 5.8 64-bit

       

      I am configuring ASM Disk groups on a brand new ASM installation. I am confused what should I use for the "Disk Discovery Path" value?

       

      • Should I use "/dev/sd*"?
      • Or should I use "/dev/disk/by-path/*"

       

      Both options give me list of the devices that have been configured. The RHEL Sys Admin mentioned that if a new device is added to any of the controllers, the device names under "/dev/sd*" will change (e.g., /dev/sdd  may become /dev/sde) which can make ASM corrupt - whereas the values under "/dev/disk/by-path/*" will NEVER change. I am not using ASMLib.

       

      I wonder which one should I use as "Disk Discovery Path" (I believe this will become value for ASM_DISKSTRING parameter)?

       

      Please advise.

       

      Best regards