Re: ASM and using more than one diskgroup

From: Li Li <>
Date: Fri, 27 Jun 2008 09:22:51 -0500
Message-ID: <>

Hi, Rick,

I don't think there's any reason that you have to use more than 1 ASM diskgroup. You might use 1 more diskgroup for FLASH_RECOVERY_AREA if you use it. Since you have SAN, you probably want SAN to do the mirroring/stripping for you instead of doing it in ASM because you've already invested in it and the performance should be better. You do need to ask what RAID group(RAID 5, 10, etc) was the LUN was created in and how many disks are in that RAID group so that you know how your data will be mirrored/stipped.

just my nonsense.

On Fri, Jun 27, 2008 at 8:08 AM, Rick Ricky <> wrote:
> I am currently using ASM with 1 production database. are there any reasons
> why I would consider using more than one diskgroup? This is just an opinion
> based queston. One reason might be if i want to spread IO on different
> disks.
> I am on a SAN. I have my SAN administrator present me space as follows
> Raid Group 1 -> Lun 1-> Linux Partition 1
> Raid Group 2 -> Lun 2 -> Linix Partition 2
> I can use the different diskgroups to spread out my IO. Or would I want 1
> diskgroup and then enable oracle striping and mirroring ?
> This design is in contrast to just creating a black box on the SAN where I
> might get multiple Luns, but I don't know what disks/raid groups they are
> pointing to.

Received on Fri Jun 27 2008 - 09:22:51 CDT

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