RE: Are RAID 1+0 and 10 the same thing?

From: Gaja Krishna Vaidyanatha <oraperfman_at_yahoo.com>
Date: Thu, 20 Sep 2001 11:20:58 -0700
Message-ID: <F001.0039403A.20010920112525@fatcity.com>

Hi Ed & list,

Actually, I did not mention any "implementation differences" in the RAID paper, as I did not think it added much value. At any rate, now that you have asked, I shall try to deliver.

One of the differences that I allude to in my article, is that RAID 10 or 1+0 is a striped device whose segments (or stripe units) are mirrored (RAID 1). But, when you compare one vendor's implementation to another's, you may observe that the location and placement of each RAID 1 segment may be different, when compared to a RAID 1+0 device. This is purely dependent on "vendor implementation", which is the reason why I mention, that they are "functionally equivalent", but may different in implementation.

Hope that helps,

Gaja

• "Shevtsov, Eduard" <EShevtsov_at_flagship.ru> wrote:
  >
  > thanks for the reply. I share your opinion but
  > believe there is some minor
  > difference.
  > According to Gaja's article:
  > <blockquote>
  > It must be noted here that RAID 10 is a derivative
  > of RAID 1+0 with similar
  > performance and availability characteristics, but
  > with some implementation
  > differences.
  > </blockquote>
  > I'm curious what implementation differences did Gaja
  > mention?
  >
  > Regards,
  > Ed
  >
  > >
  > > Yes. Both are same.
  > >
  > >
  > >
  > > -----Original Message-----
  > > Eduard
  > > Sent: Thursday, September 20, 2001 4:35 AM
  > > To: Multiple recipients of list ORACLE-L
  > >
  > >
  > > Hi List,
  > >
  > > is there any difference between 1+0 and 10?
  > >
  > > Regards,
  > > Ed
  > > --
  > --
  > Please see the official ORACLE-L FAQ:
  > http://www.orafaq.com
  > --
  > Author: Shevtsov, Eduard
  > INET: EShevtsov_at_flagship.ru
  >
  > Fat City Network Services -- (858) 538-5051 FAX:
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Gaja Krishna Vaidyanatha
Director, Storage Management Products,
Quest Software, Inc.
Co-author - Oracle Performance Tuning 101 http://www.osborne.com/database_erp/0072131454/0072131454.shtml

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Received on Thu Sep 20 2001 - 13:20:58 CDT