RE: Does ASM's EXTERNAL REDUNDANCY concatenate?
- From: "Oliver Jost" <Oliver.Jost@xxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 30 Jun 2008 15:09:25 -0400
Hi Martin,
Oracle will stripe (1MB) across your RAID (creating a plaid) which is
okay as long as the stripes of your raid are a multiple of 1MB (e.g.
256KB stripes). You could create you backend RAID and present with 6
(x2GB) LUNs carved from your RAID config as your diskgroups.
Just some thoughts.
Good luck,
Oliver
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Martin Klier
Sent: Monday, June 30, 2008 2:54 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Does ASM's EXTERNAL REDUNDANCY concatenate?
Hi list,
does ASM's EXTERNAL REDUNDANCY feature stripe the data or does it
concatenate them?
Background:
Oracle EE x86_64 on Linux, Version 10.2.0.4
Setup:
2x Adaptec 5085, each connected to an own SAS JBOD with 16x 1TB HDD, one
of them is global hot spare disk
I want a diskgroup with 12TB in size, 6TB on each JBOD.
Another sad thing: Due to Metalink note 6453944.8, I can't create ASM
diskgroups with disk members larger than 2TB due to corruption risks and
ORA-15099 (which is really nasty!).
Any ideas to the question or to my sceanrio in general are greatly
appreciated!
Thanks in advance
Martin Klier
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