Re: RAC storage newbee question
Date: Mon, 26 May 2014 19:56:37 -0500
Message-ID: <CAH4ZrrtBS_aQxjr=QKE8yEV4vBv+PbGCg26fPcCmYQi7gxtxjA_at_mail.gmail.com>
I would be very surprised to hear of a storage admin that can't provide RAID 1 volumes as raw disk - then you can add each RAID 1 volume as an externally redundant ASM disk, and then stripe across them.
On Mon, May 26, 2014 at 11:40 AM, Chris King <ckaj111_at_yahoo.ca> wrote:
> Thanks in advance for your feedback on this question.
>
> We built RAC in a lab using VMs and now are planning to build on metal.
> We're using ASM for disk storage management, so I requested raw disk.
>
> I'm told by the storage admin that he can not provide raw disk. Although
> he could provide raid 0.
>
> So my question is:
> If I ask the storage manager to provide disk that is already raid 0+1, and
> then I create ASM disk groups using the "external" option. Is this approach
> any better/worse than providing ASM raw disk to manage?
>
> (I would use the external option so that I don't end up striping and
> mirroring disk that is already striped and mirrored.)
>
> Or would it be better to have him provide all the disks as raid0, and have
> ASM handle all the redundancy?
>
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-- Adam Musch ahmusch_at_gmail.com -- http://www.freelists.org/webpage/oracle-lReceived on Tue May 27 2014 - 02:56:37 CEST