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Date:      Thu, 22 Jul 2004 20:10:39 +0400
From:      Anton Nikiforov <anton@nikiforov.ru>
To:        freebsd-hardware@freebsd.org
Subject:   Re: Is it possible to migrate raid 5 array to another controller?
Message-ID:  <40FFE6FF.5010901@nikiforov.ru>
In-Reply-To: <9BC86C67C3AF7646B9C5382020457A944E4C2A@VIP10-WIN2K>
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[-- Attachment #1 --]
Eric Toll wrote:
>  
> 
> 
>>-----Original Message-----
>>From: owner-freebsd-hardware@freebsd.org 
>>[mailto:owner-freebsd-hardware@freebsd.org] On Behalf Of 
>>Artem Koutchine
>>Sent: Thursday, July 22, 2004 6:05 AM
>>To: freebsd-questions@freebsd.org
>>Cc: freebsd-hardware@freebsd.org
>>Subject: Is it possible to migrate raid 5 array to another controller?
>>
>>Hello!
>>
>>If i am running raid5 on 3ware can i use the same disk array as
>>raid5 on, for example, high point controller without 
>>rebuilding the array, just reattching disks to a new 
>>controller? Basically, i am asking if raid5 is a industrially 
>>standard or every manufacturer adds something to its specs.
>>
>>Artem
> 
> 
> Hmm, I'm thinking no.  In order for the new controler to work it needs to
> be setup. When new it has no config. You'd need to create a logical drive
> stripe size, array size etc from the new controller bios point of view. 
> Make sure these settings are exactly the same setup as the old controller is using.
> Usually creating a logical drive (RAID X) Is a destructive process.  I could be wrong.  
> Get a good backup first before changing controllers, then try it, and you'll have
> Nothing but time to loose.
> 
Hello!
I could sertify that you cannot use the same drive on another controller 
without destruction of the data. Even if the controller storing volume's 
data on the disks in RAID.
All controllers have their own DDF (Disk data format) so they wount read 
disk from another controllers properly.

Anton

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