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Questions about: Where to find algorithms for RAID5 / RAID6

DISCUSSION Maurice Hilarius 2 participants 2 messages Apr 11, 2006 – Apr 16, 2006 MD RAID

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Good day.

I am looking for some information, and hope the readers of this list might be able to point me in the right direction:

Here is the scenario:
In RAID5 ( or RAID6) when a file is written, some parity data is created, (by some form of XOR process, I assume), then that parity data is written to disk.

I am looking to find the algorithm that is used to create that parity data and to decides where to place it on the disks.

Any help on this is deeply appreciated.

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With our best regards,


Maurice W. Hilarius        Telephone: 01-780-456-9771
Hard Data Ltd.  FAX:       01-780-456-9772
11060 - 166 Avenue         email:[email protected]
Edmonton, AB, Canada       http://www.harddata.com/
   T5X 1Y3
#1 lore raw
Quoted 10 lines · On Tuesday April 11, [email protected] wrote:

Good day.

I am looking for some information, and hope the readers of this list might be able to point me in the right direction:

Here is the scenario:
In RAID5 ( or RAID6) when a file is written, some parity data is created, (by some form of XOR process, I assume), then that parity data is written to disk.

Quoted 5 lines

I am looking to find the algorithm that is used to create that parity data and to decides where to place it on the disks.

Any help on this is deeply appreciated.

wikipedia has some useful information, and definitely has a link to a paper that described raid6 on linux.

NeilBrown