From: Stan Hoeppner <stan@hardwarefreak.com>
To: Peter Rabbitson <rabbit+list@rabbit.us>
Cc: Phil Turmel <philip@turmel.org>, linux-raid@vger.kernel.org
Subject: Re: Suboptimal raid6 linear read speed
Date: Wed, 16 Jan 2013 14:29:43 -0600 [thread overview]
Message-ID: <50F70DB7.6020104@hardwarefreak.com> (raw)
In-Reply-To: <20130116025857.GA31112@rabbit.us>
On 1/15/2013 8:58 PM, Peter Rabbitson wrote:
> On Tue, Jan 15, 2013 at 08:48:23PM -0600, Stan Hoeppner wrote:
>> With only 4 drives RAID6 doesn't make sense as RAID10 is superior in
>> every way.
>
> Except raid6 can lose any random 2 drives, while raid10 can't.
This isn't a legitimate argument. The probability of you being struck
by lightning is greater than two drives in the same mirror in a 4 drive
RAID10 dying before a rebuild completes.
I challenge you to do an exhaustive search for anyone, at any time in
history, who was managing the array properly, suffering such a two drive
failure and losing a RAID10 array, 4 drives or greater. Note that
controller failures with all drives on one controller don't count, as
that failure mode will take down any array of any RAID level.
--
Stan
next prev parent reply other threads:[~2013-01-16 20:29 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-15 12:33 Suboptimal raid6 linear read speed Peter Rabbitson
2013-01-15 12:45 ` Mikael Abrahamsson
2013-01-15 12:56 ` Peter Rabbitson
2013-01-15 16:13 ` Mikael Abrahamsson
2013-01-15 12:49 ` Phil Turmel
2013-01-15 12:55 ` Peter Rabbitson
2013-01-15 17:09 ` Charles Polisher
2013-01-15 19:57 ` keld
2013-01-16 4:43 ` Charles Polisher
2013-01-16 6:37 ` Tommy Apel Hansen
2013-01-16 9:36 ` keld
2013-01-16 16:09 ` Charles Polisher
2013-01-16 20:40 ` EJ Vincent
2013-01-15 23:17 ` Phil Turmel
2013-01-16 2:48 ` Stan Hoeppner
2013-01-16 2:58 ` Peter Rabbitson
2013-01-16 20:29 ` Stan Hoeppner [this message]
2013-01-16 21:20 ` Roy Sigurd Karlsbakk
2013-01-17 15:51 ` Mikael Abrahamsson
2013-01-18 8:31 ` Stan Hoeppner
2013-01-18 9:18 ` Mikael Abrahamsson
2013-01-18 22:56 ` Stan Hoeppner
2013-01-19 7:43 ` Mikael Abrahamsson
2013-01-19 22:48 ` Stan Hoeppner
2013-01-19 23:51 ` Maarten
2013-01-20 0:16 ` Chris Murphy
2013-01-20 0:49 ` Maarten
2013-01-20 1:37 ` Phil Turmel
2013-01-20 9:44 ` Chris Murphy
2013-01-20 6:26 ` Mikael Abrahamsson
2013-01-20 9:39 ` Chris Murphy
2013-01-20 16:55 ` Mikael Abrahamsson
2013-01-20 17:15 ` Chris Murphy
2013-01-20 17:17 ` Mikael Abrahamsson
2013-01-20 17:20 ` Chris Murphy
2013-01-19 23:53 ` Phil Turmel
2013-01-20 9:04 ` Wolfgang Denk
2013-01-20 19:28 ` Peter Grandi
2013-01-20 21:09 ` Mikael Abrahamsson
2013-01-20 21:50 ` Peter Grandi
2013-01-21 5:24 ` Mikael Abrahamsson
2013-01-21 14:40 ` Peter Rabbitson
2013-01-21 20:32 ` Peter Grandi
2013-01-21 20:55 ` Peter Grandi
2013-01-21 22:00 ` Peter Grandi
2013-01-19 13:21 ` Roy Sigurd Karlsbakk
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