From: Roberto Spadim <roberto@spadim.com.br>
To: Stan Hoeppner <stan@hardwarefreak.com>
Cc: Phillip Susi <psusi@cfl.rr.com>, Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: What's the typical RAID10 setup?
Date: Fri, 4 Feb 2011 19:13:45 -0200 [thread overview]
Message-ID: <AANLkTim2_x1LUoAwLUP9v4hVP_A6k1_eFEfKGxGFSi-i@mail.gmail.com> (raw)
In-Reply-To: <4D4C6A25.5070604@hardwarefreak.com>
http://www.lsi.com/DistributionSystem/AssetDocument/SCG_LSI_SAS_6Gbps_IR_PB_092909.pdf
raid10 = (can use linux raid10 too, but i´m just explaning raid 1+0)
mdadm --create /dev/md0 --level=1 --raid-devices 2 /dev/sda /dev/sdb
mdadm --create /dev/md1 --level=1 --raid-devices 2 /dev/sdc /dev/sdd
mdadm --create /dev/md2 --level=0 --raid-devices 2 /dev/md0 /dev/md1
2011/2/4 Stan Hoeppner <stan@hardwarefreak.com>:
> Robin Hill put forth on 2/4/2011 10:22 AM:
>> On Fri Feb 04, 2011 at 11:03:30AM -0500, Phillip Susi wrote:
>>
>>> FYI, you should get in the habit of using your mail client's reply to
>>> all function. I did not see this until now because you did not send me
>>> a copy.
>>>
>> I'll make an exception in this case, but I generally reply to messages
>> on mailing lists to the list only, and I have no plans to change this.
>>
>>> On 2/1/2011 4:20 AM, Robin Hill wrote:
>>>> No, it's RAID 10 or RAID 1+0. RAID 0+1 would be 2 mirrored pairs of
>>>> 5-disk RAID 0 arrays, in which case you could only lose 5 disks if
>>>
>>> In English we read from left to right and top to bottom, so 0+1 means
>>> stripe on top of mirror.
>>>
>> The vast majority of online sources would disagree with you. See:
>> http://en.wikipedia.org/wiki/Nested_RAID_levels
>> http://www.aput.net/~jheiss/raid10/
>> http://decipherinfosys.wordpress.com/2008/01/15/difference-between-raid-01-vs-raid-10/
>> http://www.raid.com/04_01_0_1.html
>> http://www.pcguide.com/ref/hdd/perf/raid/levels/multLevel01-c.html
>> http://www.adrc.com/raid-01.html
>>
>> The order it's written is the order of creation. RAID0+1 = RAID 0,
>> then RAID 1 (mirrored stripes) and RAID1+0 = RAID 1, then RAID 0
>> (striped mirrors).
>
> LSI is the undisputed king of HBA RAID, with all major server OEMs rebadging LSI
> cards and/or using their storage processor chips on the mobo, including Dell,
> HP, IBM, Intel, Sun, etc. Note the diagram at the bottom of this PDF showing
> the layout of RAID 10:
>
> http://www.lsi.com/DistributionSystem/AssetDocument/SCG_LSI_SAS_6Gbps_IR_PB_092909.pdf
>
> It clearly shows a stripe over two mirrors.
>
> --
> Stan
> --
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--
Roberto Spadim
Spadim Technology / SPAEmpresarial
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next prev parent reply other threads:[~2011-02-04 21:13 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
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 [this message]
2011-01-31 15:30 ` Robin Hill
2011-01-31 20:07 ` Stan Hoeppner
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