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Changing ASM redundancy level [message #264812] Tue, 04 September 2007 11:44 Go to next message
Messages: 113
Registered: April 2007
Location: Madison, WI
Senior Member

I am running Oracle10gR2 on RHEL 4 and I just finished configuring ASM. However, I realized that I needed to have EXTERNAL redundancy not NORMAL. So my question is that can I just go back and restart up the installer and choose EXTERNAL? Or do I have to go through some other process of removing disk groups and the sort?

thank you

Re: Changing ASM redundancy level [message #270733 is a reply to message #264812] Thu, 27 September 2007 22:06 Go to previous message
Messages: 121
Registered: August 2006
Senior Member
A normal redundancy disk group can tolerate the failure of one
failure group. If only one failure group fails, the disk group
remains mounted and serviceable, and ASM performs a rebalance of
the surviving disks (including the surviving disks in the failed
failure group) to restore redundancy for the data in the failed
disks. If more than one failure group fails, ASM dismounts the
disk group.

So far I havent came across any documented way to convert from normal to external

With that said, I would say go ahead and get clean start and setup all disk with external redundancy.

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