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Lord Xeb
 Post subject: Question about RAID5
PostPosted: April 16th, 2011, 22:52 
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Joined: March 28th, 2011, 23:01
Posts: 15
Location: New York
With RAID5, is the Parity information distrubuted across all the drives, or are one of the drives dedicated to it (like with RAID3)?

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Vulcan
 Post subject: Re: Question about RAID5
PostPosted: April 16th, 2011, 23:32 
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Joined: May 6th, 2008, 22:53
Posts: 2138
Location: England
Lord Xeb wrote:
With RAID5, is the Parity information distrubuted across all the drives

Yes. The normal definition of RAID 5 includes the concept of distributed parity across all the drives. The exact details of that parity distribution can vary with different vendors, although the SNIA are attempting to standardise things...

Wikipedia isn't perfect, but this will give you a starting point for research:
http://en.wikipedia.org/wiki/Standard_RAID_levels

Hope that helps. :)
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DR-Kiev
 Post subject: Re: Question about RAID5
PostPosted: April 18th, 2011, 5:56 
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Joined: March 7th, 2009, 12:43
Posts: 1076
Location: Angel Data Recovery
Lord Xeb wrote:
With RAID5, is the Parity information distrubuted across all the drives, or are one of the drives dedicated to it (like with RAID3)?


You mean Raid4 ?

Raid3 is Byte-level striping with dedicated parity.

Raid4 is Block-level striping with dedicated parity.

Raid5 is Block-level striping Block with distributed parity.

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