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2 Replies Latest reply: Aug 1, 2013 5:18 AM by user130038 RSS

Which "Disk Discovery Path" to use on RHEL?

user130038 Pro
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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

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