From: "Keld Jørn Simonsen" <keld@keldix.com>
To: Stan Hoeppner <stan@hardwarefreak.com>
Cc: "Keld Jørn Simonsen" <keld@keldix.com>,
"Jon Nelson" <jnelson-linux-raid@jamponi.net>,
"Mathias Burén" <mathias.buren@gmail.com>,
"Roberto Spadim" <roberto@spadim.com.br>,
Denis <denismpa@gmail.com>,
Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: What's the typical RAID10 setup?
Date: Fri, 4 Feb 2011 23:05:07 +0100 [thread overview]
Message-ID: <20110204220507.GA6876@www2.open-std.org> (raw)
In-Reply-To: <4D4C6C7B.2020304@hardwarefreak.com>
On Fri, Feb 04, 2011 at 03:15:39PM -0600, Stan Hoeppner wrote:
> Keld Jørn Simonsen put forth on 2/4/2011 2:42 PM:
>
> >>> So apparently their Disk Data Format specification doesn't include hybrid RAID
> >>> levels. This makes sense, as the _on disk_ layout of RAID 10 is identical to
> >>> RAID 1.
> >
> > I was puzzled here. I think you mean:
> >
> > "the _on disk_ layout of RAID 10 is identical to RAID 1 and RAID 0"
> >
> > If that is what you meant, I think we agree on most things here.
>
> I set a trap for you, of sorts. ;)
And I deliberately fell into your trap, tongue in cheek:-)
Maybe we should avoid traps and fooling around in them, as it
just confuses others and waistes our time. I do think there are valid
points coming out of our discussion here. I have tried to avoid your
ad hominem remarks and traps, and just try to be constructive.
> If what you say is true, then RAID 10 should
> be covered in the DDF, as migration from one device to another isn't possible
> without the RAID 10 on disk layout being defined in the DDF as with all the
> other RAID levels. True?
I am a little puzzled with what you mean here. RAID 1+0 is covered
in DDF 2.0 as a description of RAID-1 or RAID-1E , and then striping it
according to 4.3.1 . I do think they should add something about calling
it RAID 1+0 or maybe RAID-1E+0 or some such. And then explain something
about the term "RAID10" and why you should rather call it
RAID-1+0 or RAID-1E+0, to indicate it is a Secondary RAID level, and
to avoid ambiguity.
I have given some remarks on RAID10 on
http://www.snia.org/tech_activities/feedback/
Best regards
keld
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next prev parent reply other threads:[~2011-02-04 22:05 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-31 9:41 What's the typical RAID10 setup? Mathias Burén
2011-01-31 10:14 ` Robin Hill
2011-01-31 10:22 ` Mathias Burén
2011-01-31 10:36 ` CoolCold
2011-01-31 15:00 ` Roberto Spadim
2011-01-31 15:21 ` Robin Hill
2011-01-31 15:27 ` Roberto Spadim
2011-01-31 15:28 ` Roberto Spadim
2011-01-31 15:32 ` Roberto Spadim
2011-01-31 15:34 ` Roberto Spadim
2011-01-31 15:37 ` Roberto Spadim
2011-01-31 15:45 ` Robin Hill
2011-01-31 16:55 ` Denis
2011-01-31 17:31 ` Roberto Spadim
2011-01-31 18:35 ` Denis
2011-01-31 19:15 ` Roberto Spadim
2011-01-31 19:28 ` Keld Jørn Simonsen
2011-01-31 19:35 ` Roberto Spadim
2011-01-31 19:37 ` Roberto Spadim
2011-01-31 20:22 ` Keld Jørn Simonsen
2011-01-31 20:17 ` Stan Hoeppner
2011-01-31 20:37 ` Keld Jørn Simonsen
2011-01-31 21:20 ` Roberto Spadim
2011-01-31 21:24 ` Mathias Burén
2011-01-31 21:27 ` Jon Nelson
2011-01-31 21:47 ` Roberto Spadim
2011-01-31 21:51 ` Roberto Spadim
2011-01-31 22:50 ` NeilBrown
2011-01-31 22:53 ` Roberto Spadim
2011-01-31 23:10 ` NeilBrown
2011-01-31 23:14 ` Roberto Spadim
2011-01-31 22:52 ` Keld Jørn Simonsen
2011-01-31 23:00 ` Roberto Spadim
2011-02-01 10:01 ` David Brown
2011-02-01 13:50 ` Jon Nelson
2011-02-01 14:25 ` Roberto Spadim
2011-02-01 14:48 ` David Brown
2011-02-01 15:41 ` Roberto Spadim
2011-02-03 3:36 ` Drew
2011-02-03 8:18 ` Stan Hoeppner
[not found] ` <AANLkTikerSZfhMbkEvGBVyLB=wHDSHLWszoEz5As5Hi4@mail.gmail.com>
[not found] ` <AANLkTikLyR206x4aMy+veNkWPV67uF9r5dZKGqXJUEqN@mail.gmail.com>
2011-02-03 14:35 ` Roberto Spadim
2011-02-03 15:43 ` Keld Jørn Simonsen
2011-02-03 15:50 ` Roberto Spadim
2011-02-03 15:54 ` Roberto Spadim
2011-02-03 16:02 ` Keld Jørn Simonsen
2011-02-03 16:07 ` Roberto Spadim
2011-02-03 16:16 ` Roberto Spadim
2011-02-01 22:05 ` Stan Hoeppner
2011-02-01 23:12 ` Roberto Spadim
2011-02-02 9:25 ` Robin Hill
2011-02-02 16:00 ` Roberto Spadim
2011-02-02 16:06 ` Roberto Spadim
2011-02-02 16:07 ` Roberto Spadim
2011-02-02 16:10 ` Roberto Spadim
2011-02-02 16:13 ` Roberto Spadim
2011-02-02 19:44 ` Keld Jørn Simonsen
2011-02-02 20:28 ` Roberto Spadim
2011-02-02 21:31 ` Roberto Spadim
2011-02-02 22:13 ` Keld Jørn Simonsen
2011-02-02 22:26 ` Roberto Spadim
2011-02-03 1:57 ` Roberto Spadim
2011-02-03 3:05 ` Stan Hoeppner
2011-02-03 3:13 ` Roberto Spadim
2011-02-03 3:17 ` Roberto Spadim
2011-02-01 23:35 ` Keld Jørn Simonsen
2011-02-01 16:02 ` Keld Jørn Simonsen
2011-02-01 16:24 ` Roberto Spadim
2011-02-01 17:56 ` Keld Jørn Simonsen
2011-02-01 18:09 ` Roberto Spadim
2011-02-01 20:16 ` Keld Jørn Simonsen
2011-02-01 20:32 ` Keld Jørn Simonsen
2011-02-01 20:58 ` Roberto Spadim
2011-02-01 21:04 ` Roberto Spadim
2011-02-01 21:18 ` David Brown
2011-02-01 0:58 ` Stan Hoeppner
2011-02-01 12:50 ` Roman Mamedov
2011-02-03 11:04 ` Keld Jørn Simonsen
2011-02-03 14:17 ` Roberto Spadim
2011-02-03 15:54 ` Keld Jørn Simonsen
2011-02-03 18:39 ` Keld Jørn Simonsen
2011-02-03 18:41 ` Roberto Spadim
2011-02-03 23:43 ` Stan Hoeppner
2011-02-04 3:49 ` hansbkk
2011-02-04 7:06 ` Keld Jørn Simonsen
2011-02-04 8:27 ` Stan Hoeppner
2011-02-04 9:06 ` Keld Jørn Simonsen
2011-02-04 10:04 ` Stan Hoeppner
2011-02-04 11:15 ` hansbkk
2011-02-04 13:33 ` Keld Jørn Simonsen
2011-02-04 20:35 ` Keld Jørn Simonsen
2011-02-04 20:42 ` Keld Jørn Simonsen
2011-02-04 21:15 ` Stan Hoeppner
2011-02-04 22:05 ` Keld Jørn Simonsen [this message]
2011-02-04 23:03 ` Stan Hoeppner
2011-02-06 3:59 ` Drew
2011-02-06 4:27 ` Stan Hoeppner
2011-02-04 11:34 ` David Brown
2011-02-04 13:53 ` Keld Jørn Simonsen
2011-02-04 14:17 ` David Brown
2011-02-04 14:21 ` hansbkk
2011-02-06 4:02 ` Drew
2011-02-06 7:58 ` Keld Jørn Simonsen
2011-02-06 12:03 ` Roman Mamedov
2011-02-06 14:30 ` Roberto Spadim
2011-02-01 8:46 ` hansbkk
2011-01-31 19:37 ` Phillip Susi
2011-01-31 19:41 ` Roberto Spadim
2011-01-31 19:46 ` Phillip Susi
2011-01-31 19:53 ` Roberto Spadim
2011-01-31 22:10 ` Phillip Susi
2011-01-31 22:14 ` Denis
2011-01-31 22:33 ` Roberto Spadim
2011-01-31 22:36 ` Roberto Spadim
2011-01-31 20:23 ` Stan Hoeppner
2011-01-31 21:59 ` Phillip Susi
2011-01-31 22:08 ` Jon Nelson
2011-01-31 22:38 ` Phillip Susi
2011-02-01 10:05 ` David Brown
2011-02-01 9:20 ` Robin Hill
2011-02-04 16:03 ` Phillip Susi
2011-02-04 16:22 ` Robin Hill
2011-02-04 20:35 ` [OT] " Phil Turmel
2011-02-04 20:35 ` Phillip Susi
2011-02-04 21:05 ` Stan Hoeppner
2011-02-04 21:13 ` Roberto Spadim
2011-01-31 15:30 ` Robin Hill
2011-01-31 20:07 ` Stan Hoeppner
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